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Farmers’ perception of impacts of bovine trypanosomosis and tsetse fly in selected districts in Baro-Akobo and Gojeb river basins, Southwestern Ethiopia

Abstract

Background

Trypanosomosis, via causing anaemia, emaciation, production loss and death, is arguably the most important constraint to livestock development in Sub-Saharan countries, including Ethiopia and its impact in Baro-Akobo and Gojeb river basins (endemic areas for tsetse flies) is unknown. This study was carried out from November 2011 to April 2012 to assess farmers’ perception on the presence, impact, management and the need of intervention programs of bovine trypanosomosis and tsetse fly in selected districts located in Baro-Akobo and Gojeb river basins, Southwestern Ethiopia. A standardized questionnaire survey was employed to collect the relevant information from the farmers.

Results

The result of this study showed that 94.1% of the respondents considered bovine trypanosomosis as an economically important cattle disease which accounted for 64.6% of the total annual deaths in the year 2011/2012. Estimated mean annual financial loss via mortality due to trypanosomosis was reported to be 3501 Ethiopian Birr (US$200)/household. The reported trypanosomosis suggestive signs were consistent with published reports and farmers strongly associated the occurrence of the disease with biting flies (particularly, tsetse fly). Respondents also explained that the seasonality of the disease and its vectors, i.e. May and June are peak risk months of the year. Chemotherapy was reported the major method to combating the problem, mean frequency of treatment being 5.7 times per animal per year. Because of the economic burden of the disease, farmers expressed their strong interest and support for the establishment of intervention program in their area.

Conclusion

The study revealed that livestock keepers are familiar with bovine trypanosomosis and its vectors as well as its impacts. Thus, trypanosomosis and tsetse control strategies should be integrated with the local communities’ participation to minimize the impacts of the disease and its vectors in the area.

Background

Tsetse transmitted animal trypanosomosis is an important constraint to livestock development in Africa. It occurs in around 10 million km2 in 37 sub-Saharan countries [1] and constitutes a major threat to the survival and productivity of domestic livestock in sub-Saharan Africa [2]. In Ethiopia, it has been described as a major impediment to the livestock development and agricultural production; contributing negatively to the overall development in general and to food self-reliance efforts of the country in particular. The annual losses to the national economy are estimated to exceed US$200 million, due to its direct and indirect impact to the agricultural and livestock production. Currently, this disease and its vector (tsetse) are excluding about 180,000-220,000 km2 of agriculturally suitable land of Ethiopia and also 14 million cattle, an equivalent number of shoats and nearly of a million equines are at risk of contracting the disease [3, 4].

Tsetse and trypanosomosis control and eradication would benefit to promote human and livestock health, diversified agricultural systems, food production and security, and livelihood of the community and utilization of available natural resources. Several control approaches are available to eradicate trypanosomosis and its biological vector, the tsetse fly, from the area [1, 5]. For the successful of these control strategies greater involvement of farmers and communities in decision making, program designing, program implementing, program evaluating and creating awareness are crucial [68]. Understanding of farmers’ knowledge and perceptions on the impacts of trypanosomosis and tsetse fly and their participation in developing intervention strategies are prerequisites for effective implementation [9].

Baro-Akobo and Gojeb river basins are found in the main tsetse infested tropical humid zones of Ethiopia and these are potential areas for cash crop production mainly coffee. The river basins have suitable climate for livestock production and rearing. However, livestock production is constrained by tsetse-borne trypanosomosis [10] and there have been a few reports on the prevalence of this disease [11, 12]. However, the information on the impacts of trypanosomosis and its vector tsetse fly on livestock production are scanty in the area, even in Ethiopia [13]. It is, therefore; imperative to assess farmers’ knowledge and attitudes, on the presence, impact, diagnosis, treatment and control of trypanosomosis and its vectors in Baro-Akobo and Gojeb river basins. Hence, this study at a hand was conducted to assess farmers’ perception on the presence, impact, management and the need of intervention programs of bovine trypanosomosis and its vector tsetse fly in selected districts located in Baro-Akobo and Gojeb river basins, Southwestern Ethiopia.

Methods

Study location

The study was conducted in two selected districts located within Baro-Akobo and Gojeb river basins in Southern Nations National Peoples Regional State (SNNPR), Southwestern Ethiopia. Both river basins are found in the tsetse fly belt of Southwestern Ethiopia. Gimbo and Guraferda districts were selected from Gojeb and Baro-Akobo river basins, respectively. Baro-Akobo in the west shares international border with the eastern part of the South Sudan. Both river basins fall in the humid tropical rain forest region of Ethiopia. The annual average rainfall is among the highest in Ethiopia with a relatively dry season in January, February, March and May. Though the main rain season usually lasts from June to September; it may exceed to 8 months which is not uncommon. This trend has been, however, on gradual change. As a result, there is gradual decrease in the amount of rainfall with concomitant increase in temperature. The study areas have variable altitudes that range from 500 m to 3000 m above sea level and they are the homelands of coffee production in Ethiopia. The annual average temperature and rainfall ranges from 15.1°C to 40°C and 1200 mm to 2000 mm, respectively.

Study design

A standardized questionnaire survey was employed to generate information on the knowledge and attitude of farmers on the presence, impact and management of bovine trypanosomosis in the study areas.

Sampling strategy

A multistage random sampling procedure was applied as per Mahama et al.[14] to select districts, peasant associations and households/farmers in the study districts. The sample size of participants was determined using the formula (n = 0.25/SE2) given by Arsham [15] at the standard error (SE) of 0.0545 with 95% confidence interval. Animal health/production extension workers and, village community leaders and elders were involved in the identification of key informants and households that keep livestock within the area. Field assistants/enumerators with knowledge of animal health/production, familiarity with the study areas and ability to speak the local languages, were hired in order to support as well as carry out the interviews. Consequently, a semi-structured questionnaire was administered to a total of 84 randomly selected farmers/livestock keepers (42 from each district) in order to assess their knowledge on constraints of cattle production mainly on bovine trypanosomosis and its vectors. Before the interview, the objective of the research was explained to each participant and full consent of the interviewee was obtained. Identities of the livestock keepers interviewed were kept confidential to facilitate open and accurate responses. Each interview was restricted to 40–45 minutes. Initially, the semi-structured questionnaire was pre-tested to sort out the relevance of the tool. The questionnaire focused mainly on farmers’ perception on the presence, impact and management of trypanosomosis in cattle, and their desire for establishment of intervention programs against the disease. Then, major information obtained from individual interviewee was later supplemented by discussion with key informants (animal health personnel and agricultural extension works, community elders etc.).

Statistical analysis

Microsoft Excel spread sheet program was used to manage the raw data. Both SPSS 16 [16] and STATA 11 STATA-11 [17]) statistical analysis tools were used to analyze and interpret the data. Descriptive statistics (frequency, percentage, mean, and chi-square test) were used to analyze the qualitative data. T-test was also used to compare mean annual cost of treating trypanosomosis and other diseases per house hold. Poisson regression analysis was employed to compare the mortality rates of cattle among the study districts and PA’s where cattle number of the house hold was used as exposed population. Mortality rates were calculated by adding all deaths of cattle that occurred in the house holds due to trypanosomosis during the last 12 months (only animals which showed the common signs of trypanosomosis before their death were taken into account to quantify mortalities due to trypanosomosis). Linear regression was used to compare the cost of trypanocidal drugs in relation to expenses for treating all animal diseases in the same year. Throughout the analysis, p-value < 0.05 was considered to have statistically significant difference.

Ethical considerations

The permission to carry out this study was granted by Addis Ababa University (Addis Ababa, Ethiopia) and the Ethical and the Higher Degrees Committees of University of Gondar, Faculty of Veterinary Medicine (Gondar, Ethiopia), approved with a reference number: Ref. No.: RCS229/2011 how to use humans for interview and discussion purpose and all protocols or procedures in this study. We used those ethical approaches, which have been documented by Rollin [18] as a guide line. The objectives of this study were well explained to all participating farmers who all expressed their consent to participate in the interview and discussion. Questionnaire responses were given on a voluntary basis to all participants and respondents were permitted to withdraw their consent up to three days before data submission.

Results

Constraints associated with cattle production

Respondents reported different constraints that hinder the success of cattle production. Diseases, shortage of feed, improper grazing land management, lack of institutional support, inadequate veterinary services and market problem were most frequently reported constraints of cattle production in the study districts. Diseases resulting in high mortality and morbidity were perceived by 96.4% of livestock owners’ or respondents as the most important constraints associated with cattle production. As indicated in Table 1, trypanosomosis (95.2%), fly strike/nuisance (66.7%), ectoparasite (tick) infestation (52.4%), pasteurellosis (42.9%), blackleg (35.7%) and internal parasites (33.3%) were most frequently reported diseases in that order.

Table 1 The reported common types of cattle diseases in the study districts or river basins (n, %)

Farmers’ perception on the presence and impact of tsetse and trypanosomosis

Most livestock keepers 95.2% (92.9% in Gimbo and 97.6% in Guraferda) reported that they are familiar with bovine trypanosomosis (locally called “Gendi or Golebo”). Among these, 94.1% of the respondents listed bovine trypanosomosis as the prime economically important cattle disease in the river basins/districts. According to the respondents, among the 65 cattle deaths reported (Table 2), trypanosomosis accounted for 64.6% of the total annual deaths in the last 12 months of the year (2011/2012) and the mortality rate of cattle was 6.4%. The estimated mean financial loss due to cattle mortality as a result of bovine trypanosomosis was about 3502 ETB (US$ 200; “according to NBE 1 US$ is equivalent to 17 ETB”) per household in the study districts. However, key informants and greater number of the respondents (77.8%) said that the status/trends of trypanosomosis and its biological vector density now a day’s is decreasing gradually. In contrast to this, 16.1% of respondents said that the risk of fly and the disease has not changed while 6.2% of them reported the challenges increased time to time, and the difference between these two groups of respondents was statistically significant (P < 0.05).

Table 2 Mean mortality rates and estimated financial loss due to bovine trypanosomosis in the year (2011/2012)

Ninety-five percent of respondents in Guraferda district and eighty six percent in Gimbo district were aware of the causal association between flies (biting flies) and bovine trypanosomosis. Some respondents also associated trypanosomosis with tick bite, watering animals at river, river side grass grazing and drinking stagnant water. 44.6% of respondents also reported that wild animals are important sources of trypanosomosis etiology.

49.4% of livestock keepers have stated that bovine trypanosomosis is most severe in draft oxen (Figure 1) than in other groups of cattle whereas 21.7% asserted that the disease is equally severe in all group of animals. On the other hand, 13.3% and 15.5% of the respondent farmers noted that more trypanosomosis problem has been encountered in draft oxen and lactating cows, and lactating cows alone, respectively. Draft power loss due to sickness of oxen, treatment cost, production losses (milk and growth reduction), interference with agricultural activities, induced mortalities and replacement cost were considered as important impact of bovine trypanosomosis for 68.3%, 53.7%, 48.8%, 45.15%, 35.4% and 25.6% of the respondents, respectively.

Figure 1
figure 1

Group of cattle most severely affected by trypanosomosis as perceived by owners.

Farmers’ perception of signs of bovine trypanosomosis

Livestock owners’ noticed that different clinical signs of trypanosomosis that could be easily identified through visual observation. Though, the level of precision depends on the experience of the livestock keepers, among the observed signs of bovine trypanosomosis: ruffled hair, progressive emaciation, physical weakness, anorexia, and reduced production and performance were the most frequently reported clinical signs of trypanosomosis by livestock keepers (Table 3). In addition to this, respondents emphasized that in cattle suspected of trypanosomosis, noticeable reductions could be observed on milk production, body condition, working ability of oxen, growth rate, and price of the animal in addition to increased mortality rate in untreated cases.

Table 3 Frequently observed clinical signs of trypanosomosis according to respondents’ perception

Perception on seasonality of trypanosomosis and tsetse fly challenges

Interviewees and key informants have declared that trypanosomosis and tsetse fly challenges have wide seasonal variations (Figure 2). About 64.2% of the respondents explained that trypanosomosis and its vectors challenge reach peak level at the beginning of long rainy season (end of April-June) in terms of profound morbidity and mortality effect of the disease, fly density and fly nuisance effect. In this aspect, there was no difference (P > 0.05) among districts. On the other hand, majority of the respondents ascertained that the challenges of trypanosomosis and its vectors become mild in the dry season, particularly, in November, December, January and February.

Figure 2
figure 2

Monthly variation in the risk of trypanosomosis and tsetse fly as perceived by farmers.

Perception on the management of trypanosomosis and its cost

Overall, trypanocides 96.3% (79/82) followed by anthelmintics 67.1% (55/82), antibiotics 47% (39/82) and acaricide 35.4% (29/82) (to control ectoparasites) have been most commonly used drugs against cattle illness and ectoparasite infestation in the study districts. Use of trypanocides and ecto-pour (mainly in Guraferda district) were the only ways of managing/combating bovine trypanosomosis in the study areas at the time of this study. However, livestock keepers complain against ecto-pour/pour-on, a pour-on permethrin-piperonyl butoxide insecticide because it causes hair loss and skin damage on the back of cattle. Among those responded to have used trypanocides, most indicated Diaminazine aceturate and Isometamidium chloride (Veridium) as the most common drugs used in the study districts. These drugs have been mainly sourced from public veterinary clinics, private veterinary drug shops/stores and local markets. In this aspect, veterinary public health clinic is the main drug source in Guraferda district for 92.7% and in Gimbo district for 62% respondents; which was significantly different (P < 0.05). In addition; according to the livestock keepers report, trypanocidal drugs are commonly administered by animal health personnel (animal health assistants and community animal health workers) while significant number of cases were reported to be treated by animal owners or their family members.

The average number of trypanocidal treatments per year/cattle as indicated by the respondents was 5.7 times (range: 1–12). Mean number of treatments per individual animal per year was 7.4 times in Guraferda and 4.6 times in Gimbo district and the difference between districts was statistically significant (P < 0.05). According to the respondents, the mean (±σ) cost of trypanocidal treatment per single dose was 10 ± 2 ETB. It was higher in Gimbo (11 ± 2) than Guraferda (9 ± 2) and the difference is significant (P < 0.05). Therefore, on an average livestock keepers spent about 55 ± 14ETB (3US$) for single large animal for trypanosomosis per annum. Moreover, the average (±σ) amount of money expenditure per household per year to purchase trypanocidal drugs in the study areas for the treatment of bovine trypanosomosis was 225 ± 121 ETB (13 ± 7 US$) (Table 4). Over all costs of treating trypanosomosis was significantly (P < 0.05) higher than all costs of treating other diseases in both districts. Costs for treating other diseases in the study districts were mainly due to the purchase of antibiotics, acaricide and anthelmintics.

Table 4 Mean annual cost of treating trypanosomosis and other diseases per house hold per year

Willingness of livestock owners for establishment of intervention program

According to the information obtained, there was no launched governmental or non-governmental tsetse and trypanosomosis intervention activity in the study areas. Almost all (96.3%) of the respondents, had positive attitude for the establishment of trypanosomosis and tsetse fly intervention program in their surroundings. 87.7%, 35.4% and 30.5% of the livestock keepers expect fly and disease eradication, treatment services and drug supply benefits from the coming project, respectively. Moreover, most (92.7%) interviewees and key informants have stated their willingness to contribute their support (by money, labor and/or protection) if intervention program will be established in their surroundings.

Discussion

In order to improve the welfare and security of rural communities in Africa, particularly Ethiopia, rapid method for assessing risk and diagnosing urgent problems are needed for the control of both human and animal diseases. Therefore, this survey was conducted with the objective of seeking information about constraints of cattle production, diseases of cattle particularly the impact of bovine trypanosomosis and its management in selected districts in Baro-Akobo and Gojeb river basins. The results of the survey indicated that diseases resulting in high mortality and morbidity were highly prevalent in both districts and perceived as the most important constraints associated to cattle production. Of the reported diseases, trypanosomosis has been perceived as the number one obstacle to cattle production in the study areas. In agreement with the report of Rowlands et al.[19], the ranking of trypanosomosis as the first most important constraint to cattle production is not surprising given that both study districts were tsetse infested and that the disease causes observable losses in many aspects of production. Similarly, Stein et al. [10] observed that most respondents from tsetse infested parts of Ethiopia considered trypanosomosis as the main animal health impediment in their areas. In Afework et al.[20] and Tewelde et al.[21] studies, farmers strongly recognized trypanosomosis as the primary problem for livestock productivity and agricultural development in the northwestern and western parts of Ethiopia, respectively. This is also in agreement with reports from other tsetse infested parts of the country and elsewhere in Africa [2227]. Survey conducted in tsetse and trypanosomosis control project areas in Nigeria showed that tsetse and trypanosomosis are of much concern to farmers and represents as major obstacle to livestock production and development of allied industries [2].

In the present survey, trypanosomosis accounted for significant annualized cattle deaths. This is in agreement with the reports of Muturi [28] and Tesfaye et al. [27] who recorded 6.5% and 4.4% mortality rate of cattle in southern rift valley and Northwest Ethiopia. In Africa, more than 3–7 million cattle die due to bovine trypanosomosis (about 6% mortality rate per year) from more than 50 million cattle population at risk in the tsetse-infested areas [29, 30]. The estimated mean financial loss via cattle mortality as a result of bovine trypanosomosis in this current survey is significantly higher than other reports in the country and elsewhere in Africa [27].

Significantly higher numbers of respondents in the study districts are aware of the causal association between biting flies and bovine trypanosomosis but not considered as the etiological factor. This coupled with their knowledge on the signs of the disease and treatment suggests that the farmers have comparable understanding of the problem as reported earlier [9, 25, 31] in other African countries.

Though, the level of precision depends on the experience of the livestock keepers, most farmers could determine clinical signs suggestive of bovine trypanosomosis that are commonly described for the disease [5, 32]. Similarly, studies conducted in tsetse-infested areas of Ethiopia [10, 13, 26, 27], Kenya [9, 25, 33] and other west African countries [31] have revealed that most of the interviewed livestock farmers were able to mention the common symptoms that are used as diagnostic tool for trypanosomosis suspected cases.

According to respondents in the present survey, bovine trypanosomosis is most severe in draft oxen followed by lactating cows. This might be attributed to stress associated with work overload, lactation and pregnancy. As Rowlands et al. [34], Okech et al. [35], Swallow [30] and, Taylor and Authié [36], animals with work overload, lactation and pregnancy are highly susceptible to the diseases. In addition to this, respondents have emphasized that in cattle suspected of trypanosomosis, noticeable reductions could be observed on milk production, body condition, working ability of oxen, growth rate and price of the animal and increased mortality in untreated cases. This is in accordance with Swallow [30], Shaw [37] and Radostits et al.[32] who pointed out the impact of trypanosomosis.

Ability of livestock keepers to determine seasonal variations and peak level of trypanosomosis and its vectors as recorded in the present study is in line with the reports of Chernet et al. [38], Shimelis et al. [26] and Tesfaye et al. [27] from Ethiopia, Catley et al. [33] from Kenya and Grace et al. [31] from west Africa. Wet and warm months of the year (such as May and June) are favorable periods for vectors and trypanosomes growth and multiplication and are observed as peak months of the disease. This could be attributed to the favorable temperature and moisture for tsetse fly puparium development. Most livestock keepers have strongly associated the disease with bites of tsetse flies followed by Stomoxys and Tabanus species of flies. Similarly, in Catley et al. [33], Machila et al. [9], Ohaga et al. [25] and Stein et al. [10] studies, farmers have suggested tsetse fly as prime transmitter of bovine trypanosomosis but did not consider being the sole etiological factor for the disease. In addition to this, livestock keepers have also identified river side, forest, bushy grass land and grazing area as the most risky places for fly and trypanosomosis exposure. This is in line with the scientific description about the biology and ecology of the flies [39, 40].

To treat sick animals suspected of trypanosomosis, livestock keepers have relied upon the use of modern veterinary drugs, mainly Diaminazine aceturate and Isometamidium chloride (Veridium) whereas ecto-pour, which was disliked by most farmers due to its side effect on the skin, was reported to be employed against flies in one of study districts (Guraferda). However, the high frequency of trypanocidal application coupled with the report of self preparation and injection of the drugs by significant number of farmers indicates that there is high risk of development of drug resistance in the areas. According to Geerts and Holmes [41], repeated use of chemicals as pesticides or chemotherapeutic agents inevitably leads to the development of resistance in the target organism. Van den Bossche et al.[42], Holmes et al.[43] and Radostits et al.[32] also stressed that prolonged or frequent use of trypanocidal drugs in high challenge areas results in high selection pressure for resistance or causes development of drug resistant or drug fastness. The frequency of treatment reported in the present study is higher than earlier reports from other parts of Ethiopia [20, 21, 2628]. Therefore, this observation deserves further study on the efficacy of the common trypanocidal drugs that are being used.

In general, according to Uilenberg [44] and Maudlin et al.[5], the number of treatments over a year reflects the magnitude of trypanosome and tsetse fly challenge and drug resistance presence in the area. In agreement with this, the mean financial expenditures to purchase trypanocidal drugs per household per year in the study areas were higher than all costs of treating other diseases in both districts. This is in accordance with the work of Tesfaye et al.[27] that had been conducted in highly tsetse infested areas of northwest Ethiopia. The absence of organized governmental or non-governmental intervention program related to trypanosomosis and tsetse fly in the study areas, the expressed need for the establishment of intervention scheme and farmers’ willingness to support in many aspects also suggests the severity of the problem and the need for urgent action. This is in line with previous findings in East and West Africa [4549].

Conclusion

The study conducted on the livestock keepers’ perceptions about tsetse fly and trypanosomosis in Baro-Akobo and Gojeb river basins, provided important information on the disease situation and farmers’ perception on impact of the disease. In this study, livestock owners are familiar with bovine trypanosomosis and strongly acknowledged that it is the main sanitary constraint to livestock development in Baro-Akobo and Gojeb river basins. Livestock owners also identified the vector, tsetse fly and associated it with the disease trypanosomosis. They also had good knowledge on the suggestive signs of trypanosomosis and its impact on the agricultural activity and on the livelihood and well-being of cattle as well as on the owners themselves. Moreover; livestock keepers in the present survey expressed their strong desire for the establishment of intervention program in their areas. In addition, they expressed their willingness to support any intervention project to be implemented. In general; farmers are fully perceived and well aware of bovine trypanosomosis and its vector, impact, seasonality and intervention options. Hence, it is advisable to incorporate farmers’ knowledge in designing and implementing of the intervention program in the areas.

References

  1. Pan African Tsetse and trypanosomosis Eradication Campaign (PATTEC): A continental plan of action for the eradication of Tsetse and trypanosomosis. The Organization of African Unity pathway for the PATTEC initiative 7–16 December. 2000, Nairobi: OAU/STRC Publication

    Google Scholar 

  2. Oluwafemi RA, Ilemobade AA, Laseinde EAO: The impact of African animal trypanosomosis and tsetse on the livelihood and wellbeing of cattle and their owners in the BICOT study area of Nigeria. Sci Res Essay. 2007, 2 (9): 380-383.

    Google Scholar 

  3. Abebe G: Review article: trypanosomosis in Ethiopia. Ethiop J Biol Sci. 2005, 4 (1): 75-121.

    Google Scholar 

  4. Ministry of agriculture (MOA): Monthly Health Status Report: Ministry of Agriculture and Rural Development Veterinary Series, Epidemiology Unit. Addis Ababa, Ethiopia: MEGA Printing Press: 2005.

    Google Scholar 

  5. Maudlin I, Holmes PH, Miles MA: The Trypanosomiasis. Wallingford, UK: CAB International Publishing; 2004:1-634.

    Book  Google Scholar 

  6. Dransfield RD, Brightwell R: Community participation in Tsetse control: the principles, potential and practice. In The Trypanosomiasis. Edited by Maudlin I, et al. Wallingford, UK: CAB International Publishing; 2004:533–546.

    Chapter  Google Scholar 

  7. Grace D: Participative Trypanosomosis Control in Burkina Faso. Working paper 2: International Livestock Research Institute (ILRI): 2003.

    Google Scholar 

  8. Sindato C, Kimbita EN, Kibona SN: Factors influencing individual and community participation in the control of tsetse flies and human African trypanosomosis in Urambo district, Tanzania. Tanzania J Health Res. 2008, 10 (1): 20-27.

    Article  CAS  Google Scholar 

  9. Machila N, Wanyangu SW, McDermott J, Welburn SC, Maudlin I, Eisler MC: Cattle owners’ perceptions of African bovine trypanosomosis and its control in Busia and Kwale districts of Kenya. Acta Trop. 2003, 86: 25-34.

    Article  PubMed  Google Scholar 

  10. Stein J, Ayalew W, Rege ED, Mulatu W, Lemecha H, Tadesse Y, Tekle T, Philipsson J: Trypanosomosis and phenotypic features of four indigenous cattle breed in an Ethiopian field study. Vet Parasitol. 2011, 178: 40-47.

    Article  PubMed  Google Scholar 

  11. Fasil M: Study on prevalence of trypanosomosis among domestic animals in Bench-Maji zone, South-western Ethiopia. Addis Ababa University, Faculty of Veterinary Medicine: DVM thesis: 2004.

    Google Scholar 

  12. Tadesse A, Tsegaye B: Bovine trypanosomosis and its vector in two districts of Bench Maji Zone, south western Ethiopia. Trop Anim Health Prod. 2010, 42: 1757-1762.

    Article  PubMed  Google Scholar 

  13. Simon R, Wollny C, Workneh A, Temesgen A: Conference on International Agricultural Research for Development Tropentag 2007. Participatory assessment of incidence and perception of bovine trypanosomosis by cattle farmers in Dano, Western Ethiopia. Witzenhausen, Germany: University of Kassel-Witzenhausen and University of Gottingen: 2007.

    Google Scholar 

  14. Mahama CI, Desquesnes M, Dia ML, Losson B, De Deken R, Geerts S: A cross-sectional epidemiological survey of bovine trypanosomosis and its vectors in the Savelugu and West Mamprusi districts of northern Ghana. Vet Parasitol. 2004, 122: 1-13.

    Article  PubMed  CAS  Google Scholar 

  15. Arsham H: Descriptive Sampling Data Analysis. Statistical Thinking for Managerial Decision Making. 2002, accessed: http://home.ubalt.edu/ntsbarsh/Business-stat

    Google Scholar 

  16. SPSS-16: Statistical package for Social sciences. Version 16. Chicago: SPSS Inc: 2007.

    Google Scholar 

  17. STATA-11: StataCorp. Version 11. 4905 Lake-way Drive College station, TX 77845 USA: Stata Corp LP: 2009.

    Google Scholar 

  18. Rollin BE: An introduction to Veterinary Medical ethics: Theory and cases. 2nd edition. Iowa, USA: Blackwell publishing; 2006:1–315.

    Google Scholar 

  19. Rowlands GJ, Mulatu W, Authié E, D'Ieteren GDM, Leak SGA, Nagda SM: Effects of trypanosomosis on reproduction of East African zebu cows exposed to drug-resistant trypanosomes. Prevent Vet Med. 1994, 21: 237-249.

    Article  Google Scholar 

  20. Afework Y, Clausen PH, Abebe G, Tilahun G, Mehlitz D: Multiple-drug resistant Trypanosome congolense populations in village cattle of metekel district, north-west Ethiopia. Acta Trop. 2000, 76 (3): 231-238.

    Article  Google Scholar 

  21. Tewelde T, Abebe G, Eisler MC, McDermott J, Greiner M, Afework Y, Kyule M, Munstermann S, Zessin KH, Clausen PH: Application of field methods to assess Isometamidium resistance of trypanosomes in cattle in western Ethiopia. Acta Trop. 2004, 90: 163-170.

    Article  PubMed  CAS  Google Scholar 

  22. Muangirwa CJ, Kimaro EE, Mujuni P, Assey T, Lugembe KKM, Sikay M, Mwitumba A: Distribution of tsetse flies in Mara Region, northwestern Tanzania and appraisal of community based intervention. Proceedings of the 26th Meeting of the OAU/STRC, Ouagadougou, Burkina Faso. Nairobi: OAU/STRC Publication; 2001:398-406.

    Google Scholar 

  23. Njoku CI, Uzoigwe NR, Afagbonna VN, Abubakar A, Usman B: Community perception of animal trypanosomosis in Durbi village, Jos east Local Government Area of Plateau State, Central Nigeria. Proceedings of the 27th Meeting of the OAU/STRC, 29 September, Pretoria, South Africa. Nairobi: OAU/STRC Publication: 2003.

    Google Scholar 

  24. Nyamwaro SO, Muriuki GW, Mukira PW: A socio-economic appraisal of current practices, constraints and opportunities of livestock health, production and utilization in the tsetse-infected Transmara district, Kenya. Proceedings of the 27th Meeting of the ISCTRC, 29 September, Pretoria, South Africa. 2003, Nairobi: OAU/STRC Publication

    Google Scholar 

  25. Ohaga SO, Kokwaro ED, Ndiege IO, Hassanali A, Saini RK: Livestock farmers’ perception and epidemiology of bovine trypanosomosis in Kwale district, Kenya. Prev Vet Med. 2007, 80: 24-33.

    Article  PubMed  CAS  Google Scholar 

  26. Shimelis D, Sangwan AK, Getachew A: Epidemiology of bovine trypanosomosis in the Abay (Blue Nile) basin areas of northwest Ethiopia. Rev Med Vet. 2005, 58 (3): 151-157.

    Google Scholar 

  27. Tesfaye D, Speybroeck N, Deken RD, Thys E: Economic burden of bovine trypanosomosis in three villages of Metekel zone, Northwest Ethiopia. Trop Anim Health Prod. 2011, 44 (4): 873-879.

    Article  PubMed  Google Scholar 

  28. Muturi KS: MSc thesis, submitted to Addis Ababa University, Ethiopia and Freie Univesrsitat Berlin, Germany. Epidemiology of bovine trypanosomosis in selected sites of southern rift valley of Ethiopia. Addis Ababa University Printing Press: Addis Ababa; 1999:1-112.

    Google Scholar 

  29. Gilbert M, Jenner C, Pender J, Rogers D, Slingenbergh J, Wint W: Programme against African Trypanosomosis Information System (PAATIS). World Class Parasites. 2002, 1: 11-24.

    Article  Google Scholar 

  30. Swallow BM: Impacts of trypanosomiasis on African Agriculture. PAAT Technical and Scientific Series 2. Rome: FAO: 2000,52.

    Google Scholar 

  31. Grace D, Randolph T, Affognon H, Dramane D, Diall O, Clausen PH: Characterization and validation of farmers’ knowledge and practice of cattle trypanosomosis management in the cotton zone of West Africa. Acta Trop. 2009, 111: 137-143.

    Article  PubMed  Google Scholar 

  32. Radostits OM, Gay CC, Hinchliff KW, Constable PD: A textbook of the diseases of cattle, horses, sheep, pigs and goats. 10th edition. New York: Saunders Edinburgh; 2007:1531–1540.

    Google Scholar 

  33. Catley A, Irungu P, Simiyu K, Dadye J, Mwakio W, Kirangu J, Nyamwaro SO: Participatory investigations of bovine trypanosomosis in Tana River district, Kenya. Med Vet Entomol. 2002, 16: 55-66.

    Article  PubMed  CAS  Google Scholar 

  34. Rowlands GJ, Mulatu W, Authié E, Leak SGA, Peregrine AS: Epidemiology of bovine trypanosomosis in the Gibe valley, Southwest Ethiopia. Acta Trop. 1995, 53: 135-150.

    Article  Google Scholar 

  35. Okech G, Dolan RB, Stevenson P, Alushula H, Watson ED, Luckins AG, Omus JK: The effect of trypanosomosis on pregnancy in trypanotolerant Orma Boran cattle. Theriogenol. 1996, 46: 441-447.

    Article  CAS  Google Scholar 

  36. Taylor K, Authié EML, et al: Pathogenesis of Animal Trypanosomosis. The Trypanosomiasis. Edited by: Maudlin E. Wallingford, UK: CAB International Publishing: 2004.

    Google Scholar 

  37. Shaw APM, et al: Economics Impacts of African Trypanosomiasis. The Trypanosomosis. Edited by: Maudlin . Walling ford, UK: CAB International Publishing; 2004:369-402.

    Chapter  Google Scholar 

  38. Chernet T, Sani RA, Panandam JM, Nadzr S, Speybroeck N, Van den Bossche P: Seasonal prevalence of bovine trypanosomosis in a tsetse-infested zone and a tsetse-free zone of the Amhara Region, Northwest Ethiopia. Onderstepoort J Vet Res. 2004, 71 (4): 307-312.

    Google Scholar 

  39. Hargrove JW, et al: Tsetse population dynamics. The Trypanosomiasis. Edited by: Maudlin I. Wallingford, UK: CAB International Publishing; 2004:113-137.

    Chapter  Google Scholar 

  40. Leak SGA: Tsetse biology and Ecology: their role in the epidemiology and control of trypanosomosis. Tsetse challenge and its relationship to trypanosome prevalence in cattle. Acta Trop. 1999, 53: 121-134.

    Article  Google Scholar 

  41. Geerts S, Holmes PH: Drug management and parasite resistance in bovine trypanosomosis in Africa. Rome (Italy): FAO, PAAT Technical and Scientific Series, no.1: 1998.

    Google Scholar 

  42. Van den Bossche P, Doran M, Conner RJ: An analysis of trypanocidal use in the eastern province of Zambia. Acta Trop. 2000, 75: 247-258.

    Article  PubMed  CAS  Google Scholar 

  43. Holmes PH, Eisler MC, Geerts S, et al: Current Chemotherapy of Animal Trypanosomosis. The Trypanosomiasis. Edited by: Maudlin I. Wallingford, UK: CAB International Publishing; 2004:431-444.

    Chapter  Google Scholar 

  44. Uilenberg G: A field guide for diagnosis, treatment and prevention of African animal trypanosomosis. Adapted from the original edition by W.P. Boyt. Rome: Food and Agriculture Organization of the United Nations (FAO); 1998:43-135.

    Google Scholar 

  45. Echessah NP, Swallow BM, Kamara DW, Curry JJ: Willingness to contribute labor and money to tsetse control: application of contingent valuation in Busia district, Kenya. World Dev. 1997, 25 (2): 239-253.

    Article  Google Scholar 

  46. Kamuanga M, Swallow BM, Sigue H, Bauer B: Evaluating contingent and actual contribution to a local public good: Tsetse control in the Yale agro-pastoral zone, Burkina Faso. Ecol Econ. 2001, 39: 115-130.

    Article  Google Scholar 

  47. Mugalla CI: Household decision making under different levels of trypanosomosis risk: an investigation of factors affecting diseases control, labor participation, and income decisions in rural household of the Gambia. Pennsylvania State University, Department of Agricultural Economics and Rural Sociology, Pittsburg (USA): PhD thesis: 2000.

    Google Scholar 

  48. Pokou K, Kamuanga MJ, N’Gbo AGM: Farmers’ willingness to contribute to tsetse and trypanosomosis control in West Africa: the case of northern Cote d’Ivoire. Biotechnol Agron Soc Environ. 2010, 14 (3): 441-450.

    Google Scholar 

  49. Swallow BM, Woudyalew M: Evaluating willingness to contribute to a local public good: application of contingent valuation to tsetse control in Ethiopia. Ecol Econ. 1994, 11: 153-161.

    Article  Google Scholar 

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Acknowledgment

We wish to extend our sincere appreciation to Addis Ababa University, office of the Vice President for Research and Dean of Graduate Studies for financial support.

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Correspondence to Zewdu Seyoum.

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ZS: Developed the project, wrote the protocol, collected the data during field work, analyzed the data and interpreted the result, drafted the manuscript and final proof reading of the manuscript before was submitted to the journal. GT: Developed the project, Project leader, gave support during field work, read, reviewed and corrected the manuscript on technical and language part. HA: Developed the project, Assistant project leader, read, edited and gave technical support on the manuscript before was submitted to the journal. All authors read and approved the final manuscript.

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Seyoum, Z., Terefe, G. & Ashenafi, H. Farmers’ perception of impacts of bovine trypanosomosis and tsetse fly in selected districts in Baro-Akobo and Gojeb river basins, Southwestern Ethiopia. BMC Vet Res 9, 214 (2013). https://0-doi-org.brum.beds.ac.uk/10.1186/1746-6148-9-214

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