De La Fuente José, Golsteyn Thomas Elizabeth J, van den Bussche Ronald A, Hamilton Robert G, Tanaka Elaine E, Druhan Susan E, Kocan Katherine M
Department of Veterinary Pathobiology, College of Veterinary Medicine, Stillwater, Oklahoma 74078, USA.
Appl Environ Microbiol. 2003 Aug;69(8):5001-5. doi: 10.1128/AEM.69.8.5001-5005.2003.
Anaplasma marginale (Rickettsiales: Anaplasmataceae), a tick-borne pathogen of cattle, is endemic in tropical and subtropical regions of the world. Although serologic tests have identified American bison, Bison bison, as being infected with A. marginale, the present study was undertaken to confirm A. marginale infection and to characterize isolates obtained from naturally infected bison in the United States and Canada. Major surface protein (MSP1a and MSP4) sequences of bison isolates were characterized in comparison with New World cattle isolates. Blood from one U.S. bison was inoculated into a susceptible, splenectomized calf, which developed acute anaplasmosis, demonstrating infectivity of this A. marginale bison isolate for cattle. The results of this study showed that these A. marginale isolates obtained from bison were similar to ones from naturally infected cattle.
边缘无形体(立克次氏体目:无形体科)是一种牛的蜱传病原体,在世界热带和亚热带地区流行。尽管血清学检测已确定美洲野牛(Bison bison)感染了边缘无形体,但本研究旨在确认边缘无形体感染,并对从美国和加拿大自然感染野牛中获得的分离株进行特征分析。将来自一头美国野牛的血液接种到一头易感的、脾切除的小牛体内,该小牛患上了急性无形体病,证明这种边缘无形体野牛分离株对牛具有感染性。本研究结果表明,从野牛中获得的这些边缘无形体分离株与从自然感染牛中获得的分离株相似。