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Table 1 Prevalence of bacteria in udder quarter secretions of heifers

From: Host adapted intramammary infections in pregnant heifers which were co-housed and reared on fresh milk as calves

Herds (quarters)

No Growth

STA*

SAG*

CNS**

STR**

ENT**

Other bact. **

N (%)

N (%)

N (%)

N (%)

N (%)

N (%)

N (%)

A (1246)

844 (67.74)

6 (0.48)

0

307 (24.64)

9 (0.72)

6 ( 0.48)

74 (5.94)

B (1404)

883 (62.89

10 (0.71)

3 (0.21)

437 (31.13)

23 (1.64)

5 ( 0.36)

43 (3.06)

C (804)

576 (71.64)

0

1 (0.12)

166 (20.65)

30 (3.73)

5 (0.62)

26 (3.23)

D (1756)

1233 (70.22)

37 (2.11)

0

390 (22.21)

8 (0.46)

7 (0.4)

81 (4.61)

E (640)

363 (56.72)

14 (2.19)

0

217 (33.91)

6 (0.94)

2 (0.31)

38 (5.94)

F (1123)

883 (78.63)

4 (0.36)

3 (0.27)

178 (15.85)

22 (1.96)

6 (0.53)

27 (2.4)

G (932)

478 (51.29)

6 (0.64)

0

366 (39.27)

12 (1.29)

2 (0.21)

68 (7.3)

H (352)

225 (63.92)

1 (0.28)

0

98 (27.84)

5 (1.42)

1 (0.28)

22 (6.25)

All (8257)

5485 (66.43)

78 (0.94)

7 (0.08)

2159 (26.15)

115 (1.39)

34 (0.41)

379 (4.59)

  1. STA = Staphylococcus aureus; CNS = coagulase negative staphylococci; SAG = Streptococcus agalactiae; STR = Streptococcus uberis, Streptococcus dysgalactiae, Enterococcus faecalis; ENT = Gram negative bacteria; Other bact. = Staphylococcus pseudintermedius, Micrococcus, Bacillus spp., & mixed growth.
  2. * = Host-adapted pathogens. **Environmental pathogens.