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. 1985 Dec;50(3):647–654. doi: 10.1128/iai.50.3.647-654.1985

Strain differences in susceptibility to murine respiratory mycoplasmosis in C57BL/6 and C3H/HeN mice.

J K Davis, R F Parker, H White, D Dziedzic, G Taylor, M K Davidson, N R Cox, G H Cassell
PMCID: PMC261127  PMID: 4066026

Abstract

Not only is murine respiratory mycoplasmosis, due to Mycoplasma pulmonis, a complication of biomedical research, it provides excellent animal models to study the development of a naturally occurring respiratory disease induced by an infectious agent. The understanding of pathogenic mechanisms of disease can be greatly facilitated by studying genetic differences in susceptibility. Five strains of mice with various H-2K haplotypes were examined for their susceptibility to murine respiratory mycoplasmosis; of these, C57BL/6 and C3H/HeN mice were chosen for additional study. There were no significant differences in the incidence of infection in either the upper or lower respiratory tract or in the severity of upper respiratory tract lesions in the two strains as determined at 14 days postinfection. In striking contrast, the C57BL/6 mice were significantly more resistant to the development of gross and microscopic lung lesions and to death due to pneumonia as shown by an almost 100-fold difference in the 50% lethal dose, 50% gross pneumonia dose, and 50% microscopic lesion dose. The most apparent differences in lung lesions between the two strains were in the severity of acute lesions of the bronchial epithelium, the amount of mixed inflammatory response in the alveoli, and the amount of lymphoid infiltrates. All were significantly more severe in C3H/HeN mice. In addition, more C3H/HeN mice developed antibody responses to M. pulmonis. The amount of antibody correlated with lesion severity in both strains.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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