Field and experimental epidemiology of Salmonella infection in calves

R.A. Robinson

Ruakura Agricultural Research Centre, Hamilton

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Proceedings of the New Zealand Society of Animal Production. 1966, 26: 134-144

A survey of 2,868 calves, approximately 4 days old, from 78 randomly-selected dairy farms showed a low level ( <1%) of animals excreting salmonella organisms in the faeces. Where young calves are congregated in large groups, rapid transfer of infection can occur. Retaining calves on the farm until 14 to 21 days of age is likely to reduce cross infection occurring during transport and holding prior to slaughter. Salmonellae can be isolated from 14- to 21-day-old calves either dosed with approximately 10 Salmonella typhimurium at 2 days of age or exposed to infection from other excreting calves on the farm. The longer calves are retained on a property the more likely are they to clear themselves of S. typhimurium infection. Where calves are brought on to a property at a young age for rearing, isolation in groups for two to three weeks is sound husbandry practice. Clinical salmonellosis in young calves is often associated with poor hygiene and management.

Keywords: NZSAPAB;

Last Updated 24-08-2000