Pathology of Bovine Abortion and Newborn Calf Death Caused by Dual Infection with Chlamydia psittaci and Infectious Bovine Rhinotracheitis Virus.

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  • Chlamydia psittaciおよび牛伝染性鼻気管炎ウイルスの混合感染による牛流産および新生子牛死の病理学的観察
  • Pathology of bovine abortion and newbor

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Abstract

Nine aborted fetuses and one newborn calf, diagnosed as Chlamydia psittaci (C.psittaci) infection, were pathologically examined. The characteristic lesions in the liver were focal necrosis in 9 aborted fetuses and granulomatous necrotic foci in the newborn calf. Moderate numbers of intranuclear inclusion bodies were found in necrotic foci of the liver, spleen, thymus, lymph nodes, adrenal gland, kidney, lung and forestomach. Immunohistologically, a small number of C.psittaci antigens was demonstrated in necrotic foci of the liver and correlated with distribution of elementary bodies. Moderate numbers of infectious bovine rhinotracheitis (IBR) virus antigens were also detected in degenerating and necrotizing parenchymal cells in various organs and correlated with distribution of intranuclear inclusion bodies. Thus, these aborted bovine fetuses and newborn calf were interpreted as being dually infected with C.psittaci and IBR virus during pregnancy.

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