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Vet Microbiol. 1986 Feb;11(1-2):79-91.

Identification of Mycoplasmatales in pneumonic calf lungs.


Lungs from 153 calves with clinical signs of pneumonia were examined post-mortem (PM) for the presence of mycoplasmas and ureaplasmas during a 38-month period. Sixty-two percent of the cases were submitted during the months when wide fluctuations in climatic conditions occur. Using indirect fluorescent antibody tests (IFAT) and culture, mycoplasmas and/or ureaplasmas were detected in 63% of the lungs examined. Mycoplasma dispar was detected in 39%, M. bovis in 36%, Ureaplasma spp. in 22% and M. bovirhinis in 8.5% of the lungs. Thirty percent of the lungs were infected with more than one species; the most frequent combination was M. bovis, M. dispar and Ureaplasma spp. (10.5%). M. arginini, M. bovigenitalium and acholeplasmas were not cultured. M. dispar was shown to remain viable for up to 15 days PM in apical and cardiac lobes held at 4 degrees C and also was detected by IFAT in the same tissues for 49 days.

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