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The production of mastitis in cows by the intramammary inoculation of T-mycoplasmas

Published online by Cambridge University Press:  19 October 2009

R. N. Gourlay ,
C. J. Howard  and
J. Brownlie
R. N. Gourlay
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Newbury, Berkshire
C. J. Howard
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Newbury, Berkshire
J. Brownlie
Affiliation:
A.R.C. Institute for Research on Animal Diseases, Compton, Newbury, Berkshire
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Six milking cows were inoculated with bovine and human T-mycoplasmas and control materials into the udder via the teat canal. Control materials produced only a slight transient cell response in the milk. Bovine T-mycoplasmas produced clinical mastitis in nine out of ten quarters inoculated. Seven developed clinical mastitis together with visible changes in the milk, excretion of T-mycoplasmas and greatly increased cell counts in the milk. In three of these quarters, in two different cows, milk secretion ceased completely. Two quarters in a different cow showed visible milk changes, excretion of T-mycoplasmas and increased cell counts. Two quarters were inoculated with human T-mycoplasmas and neither produced any signs of mastitis.

Infection of the udder with T-mycoplasmas did not stimulate high-titre serum antibody levels as measured by the metabolic inhibition test, but whey samples gave high titres in two of the cows that were able to control and resolve the infection.

Type
Research Article
Information
Journal of Hygiene , Volume 70 , Issue 3 , September 1972 , pp. 511 - 521
Copyright
Copyright © Cambridge University Press 1972

References

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