Significant rising antibody titres to influenza A are associated with an acute reduction in milk yield in cattle

T. R. Crawshaw, I. H. Brown, S. C. Essen, S. C.L. Young

Research output: Contribution to journalArticle

Abstract

Sporadic cases of an acute fall in milk production, "milk drop", were investigated in a Holstein Friesian dairy herd in Devon. The investigation was a case control study with two controls per case. Paired blood samples demonstrated that rising antibody titres to human influenza A/Eng/333/80 (H1N1) and human influenza A/Eng/427/88 (H3N2) were associated with an acute fall in milk production. Rising titres to Bovine respiratory syncytial virus (BRSV), Bovine virus diarrhoea virus (BVD), Infectious bovine rhinotracheitis (IBR), and Parainfluenza virus 3 (PI3) were not associated with an acute fall in milk production. Cases with rises in antibody to influenza A had significantly higher respiratory scores and rectal temperatures than their controls. The mean loss of milk production for the cases with rises in antibody to influenza A compared to their controls was 159.9 litres. This study provides further evidence that influenza A persists in cattle and causes clinical disease.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalCattle Practice
Volume15
Issue number3
Publication statusPublished - 01 Nov 2007

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