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A comparative study of spirochaetes from the porcine alimentary tract

Published online by Cambridge University Press:  25 March 2010

Ruth M. Lemcke  and
M. R. Burrows
Ruth M. Lemcke
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Berkshire. RG16 0NN, England
M. R. Burrows
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Berkshire. RG16 0NN, England
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Summary

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Strains of Treponema hyodysenteriae capable of inducing swine dysentery in specific pathogen-free pigs were compared with other spirochaetes from the porcine alimentary tract by biochemical and serological tests and by electrophoresis of their proteins. Carbohydrate fermentation and esculin hydrolysis were similar in all the spirochaetes. Indole was produced by T. hyodysenteriae and by some of the other spirochaetes. Analysis of the fatty acids produced from glucose showed a difference between T. hyodysenteriae and other spirochaetes only in the amount of n-butyric acid produced. The indirect fluorescent antibody test showed extensive cross-reactions between all the spirochaetes unless antisera were first absorbed. A microtitre agglutination test and a growth-inhibition test were both more specific; strains of T. hyodysenteriae could be distinguished from the other spirochaetes using unabsorbed sera. Both tests revealed some antigenic heterogeneity among strains of T. hyodysenteriae. The cell proteins of a single strain of T. hyodysenteriae gave an electrophoretic pattern distinct from those of the other spirochaetes.

Two of the six spirochaetes not associated with swine dysentery, PWS/B and PWS/C, were indistinguishable serologically and electrophoretically. The other four strains were serologically distinct from one another and from PWS/B and PWS/C. Only two of these spirochaetes were examined electrophoretically, but each gave a different pattern from PWS/B and PWS/C. The diversity observed among spirochaetes not associated with swine dysentery indicates that their suggested inclusion in a single species, T. innocens, may prove to be unjustified.

Type
Research Article
Information
Journal of Hygiene , Volume 86 , Issue 2 , April 1981 , pp. 173 - 182
Copyright
Copyright © Cambridge University Press 1981

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