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bronchiectasis in yearling feedlot cattle.thoughout all of 1974, we surveyed, for illnesses and deaths, about 407,000 yearling feedlot cattle. from the 3,943 dead cattle, 1,988 necropsies were made; of the cattle necropsied, 32 (1.6%) had bronchiectasis. in this disease, the permanently dilated small bronchi and bronchioles, located in ventral parts of the lungs, were filled with accumulations of exudate and microorganisms, including pasteurella hemolytica, pasteurella multocida, corynebacterium pyogenes, escherichia coli, salmonella an ...1976956033
a bighorn sheep die-off in southern colorado involving a pasteurellaceae strain that may have originated from syntopic cattle.we investigated a pasteurellosis epizootic in free-ranging bighorn sheep (ovis canadensis) wherein a pasteurellaceae strain carried by syntopic cattle (bos taurus) under severe winter conditions appeared to contribute to pneumonia in affected bighorns. twenty-one moribund or dead bighorn sheep were found on the "fossil ridge" herd's winter range, colorado, usa, between 13 december 2007 and 29 february 2008. eight carcasses examined showed gross or microscopic evidence of acute to subacute fibrin ...201020966277
how respiratory pathogens contribute to lamb mortality in a poorly performing bighorn sheep ( ovis canadensis ) herd.we evaluated bighorn sheep ( ovis canadensis ) ewes and their lambs in captivity to examine the sources and roles of respiratory pathogens causing lamb mortality in a poorly performing herd. after seven consecutive years of observed december recruitments of <10%, 13 adult female bighorn sheep from the remnant gribbles park herd in colorado, us were captured and transported to the thorne-williams wildlife research center in wyoming in march 2013. ewes were sampled repeatedly over 16 mo. in april ...201727690193
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