Barr S C, Brown C C, Dennis V A, Klei T R
Department of Clinical Sciences, School of Veterinary Medicine, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853.
J Parasitol. 1991 Aug;77(4):624-7.
The prevalence of Trypanosoma cruzi in 48 opossums and 98 armadillos from southern Louisiana was studied. Sixteen opossums (33.3%) and 1 armadillo (1.1%) were positive for T. cruzi by blood culture. Hearts from 45 opossums and the tissues from the 1 blood culture-positive armadillo were available for histopathological examination. Although histopathology revealed T. cruzi pseudocysts in 6 opossums, 2 were not positive on blood culture. Therefore, 18 opossums (37.5%) were positive for T. cruzi. Twenty-two of 45 opossums had histological evidence of myocarditis. No lesion typical of infection with T. cruzi was observed in the armadillo tissues. These results substantiate that the opossum is a current reservoir host of T. cruzi infection in southern Louisiana and that armadillos may be of relatively minor importance.
对路易斯安那州南部的48只负鼠和98只犰狳体内克氏锥虫的感染率进行了研究。通过血培养，16只负鼠（33.3%）和1只犰狳（1.1%）的克氏锥虫呈阳性。45只负鼠的心脏以及1只血培养呈阳性的犰狳的组织可用于组织病理学检查。尽管组织病理学显示6只负鼠体内有克氏锥虫假囊肿，但其中2只血培养呈阴性。因此，18只负鼠（37.5%）的克氏锥虫呈阳性。45只负鼠中有22只具有心肌炎的组织学证据。在犰狳组织中未观察到典型的克氏锥虫感染病变。这些结果证实，负鼠是路易斯安那州南部目前克氏锥虫感染的储存宿主，而犰狳的重要性可能相对较小。
