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Salmonella saint-paul infection in calves

Published online by Cambridge University Press:  19 October 2009

M. M. Aitken ,
G. T. H. Brown ,
P. W. Jones  and
P. Collins
M. M. Aitken
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berkshire RG16 0NN
G. T. H. Brown
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berkshire RG16 0NN
P. W. Jones
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berkshire RG16 0NN
P. Collins
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berkshire RG16 0NN
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Summary

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A natural outbreak of Salmonella saint-paulinfection in two Institute herds was monitored clinically, bactcriologically and immunologically. This paper describes the findings in calves. Morbidity and mortality became apparent 30 days after S. saint-paul was first isolated on routine sampling of neonatal calf faeces. All heifer calves were treated with a tetracycline or ampicillin preparation when they showed clinical signs of disease, while the effects of intradermal vaccination with heat-killed S. saint-paul were assessed in a proportion of the bull calves.

Antibiotic treatment reduced mortality and the number of persistent excretors; vaccination did not affect mortality but, if given during the first week of life, reduced the duration of faecal excretion. Calves which were untreated and unvaccinated, or vaccinated when older than 16 days, excreted S. saint-paul for periods of up to 18 months. Of six ‘recovered’ calves, which had been negative on faecal culture for 5–8 weeks, four yielded S. saint-paul at necropsy. Agglutinating antibody titres were highest in those unvaccinated calves which were persistent excretors.

Type
Research Article
Information
Journal of Hygiene , Volume 91 , Issue 2 , October 1983 , pp. 259 - 265
Copyright
Copyright © Cambridge University Press 1983

References

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