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The serology of experimental Salmonella dublin infections of cattle

Published online by Cambridge University Press:  15 May 2009

G. A. Hall ,
P. W. Jones ,
Maureen M. Aitken  and
K. R. Parsons
G. A. Hall
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berks RG16 0NN
P. W. Jones
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berks RG16 0NN
Maureen M. Aitken
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berks RG16 0NN
K. R. Parsons
Affiliation:
Agricultural Research Council, Institute for Research on Animal Diseases, Compton, Newbury, Berks RG16 0NN
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Agglutinating antibodies to somatic ‘O’ and flagellar ‘H’ antigens of S. dublin were measured in the serum of 43 pregnant heifers before intravenous or oral infection with S. dublin and in the serum of 21 uninfected control animals. The data from these animals were analysed statistically and a titre of 1/80, to both antigens, has been interpreted as of doubtful significance and a titre of 1/160 to both antigens, has been interpreted as significantly raised. Animals in which fetal infection occurred after challenge by either the intravenous or oral route developed significant increases in ‘H‘O’ titres indicating the value of measuring ‘H’ titres in the diagnosis of S. dublin abortion. In animals which were infected orally and in which infection appeared to be confined to the alimentary tract the ‘H’ titre did not become significantly raised. Lack of correlation between antibody titres and faecal excretion of S. dublin and persistence of infection in carcasses confirms that the serum agglutination test is of no value in detecting latent carriers.

Type
Research Article
Information
Journal of Hygiene , Volume 81 , Issue 1 , August 1978 , pp. 31 - 41
Copyright
Copyright © Cambridge University Press 1978

References

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