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Naturally occurring subclinical Corynebacterium kutscheri infection in laboratory rats: strain and age related
E Suzuki1, K Mochida, M Nakagawa
1Department of Veterinary Science, National Institute of Health, Tokyo, Japan.
Abstract:
Naturally occurring subclinical Corynebacterium kutscheri infection was analyzed by antibody response related to the strain of rats. Wistar-Lewis, Wistar and Spraque-Dawley rats were high responders in seroconversion rates and antibody titers, while Brown Norway and Fischer rats were low responders. The antibody response was related to age also. Some young rats had maternal antibody to C. kutscheri, but antibody disappeared before 8 weeks of age. Rats were antibody-negative for several months thereafter and became antibody-positive after 6 months of age. The antibody response was highest at 8 to 9 months of age in subclinical C. kutscheri infection. This antibody response was very late, compared to the antibody response to Sendai virus and Mycoplasma infections.
