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Table 5 Zootechnical results, clinical and necropsy findings

From: Observation of risk factors, clinical manifestations and genetic characterization of recent Newcastle Disease Virus outbreak in West Malaysia

Risk factor

Affected farms

Negative controls

Age of first occurrence of disease

15.9a

28.0a

Age of clinical and necropsy examination

24.8a

32.5a

Mortality at grow-out, %

32.3 %a

4.5 %b

Presence of respiratory disease

100 %a

100 %a

Presence of enteric disease

100 %a

0 %b

Torticolis and neurological signs

91.7 %a

0 %b

Haemorrhages in more than 1 visceral organ

83.3 %a

0 %b

Thymus atrophy

100 %a

0 %b

Bursal atrophy

75 %a

50 %b

Ascites

8.3 %a

50 %a

Air-sacculitis, perihepatitis and peritonitis

16.7 %a

50 %b

Clouded air sacs

50 %c

100 %d

  1. Note: a,bValues in different columns bearing different superscripts are significantly different (P < 0.05), c,dValues in different columns bearing different superscripts are significantly different (P < 0.01)