Neimark Harold, Hoff Brent, Ganter Martin
Department of Microbiology and Immunology, Box 44, College of Medicine, State University of New York, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.
Animal Health Laboratory, Laboratory Service Division, University of Guelph, Guelph, Ontario, Canada NIH 6R8.
Int J Syst Evol Microbiol. 2004 Mar;54(Pt 2):365-371. doi: 10.1099/ijs.0.02858-0.
Eperythrozoon ovis, an erythrocytic agent that causes haemolytic anaemia in sheep and goats, occurs worldwide and is currently thought to be a rickettsia. To determine the relationship between this agent and other haemotrophic bacterial parasites, the 16S rRNA gene of this organism was sequenced. Phylogenetic analysis revealed that this wall-less bacterium is not a rickettsia, but a mycoplasma. This mycoplasma is related closely to several other uncultivated, epierythrocytic mycoplasmas that comprise a recently identified group, the haemotrophic mycoplasmas (haemoplasmas). The haemoplasma group is composed of former Eperythrozoon and Haemobartonella species, as well as newly identified epierythrocytic mycoplasmas. Haemoplasmas parasitize the surface of erythrocytes of a wide variety of vertebrate animal hosts and are transmitted mainly by blood-feeding arthropod vectors. Recognition that E. ovis is a mycoplasma provides a new approach to dealing with this bacterium. It is proposed that E. ovis should be reclassified as Mycoplasma ovis comb. nov.
绵羊附红细胞体是一种可导致绵羊和山羊溶血性贫血的红细胞病原体，在全球范围内均有发生，目前被认为是一种立克次氏体。为了确定该病原体与其他血营养性细菌寄生虫之间的关系，对该生物体的16S rRNA基因进行了测序。系统发育分析表明，这种无细胞壁细菌并非立克次氏体，而是支原体。这种支原体与其他几种未培养的、红细胞表面寄生的支原体密切相关，这些支原体构成了一个最近鉴定出的群体——血营养性支原体（血支原体）。血支原体群体由以前的附红细胞体属和血巴尔通体属物种以及新鉴定出的红细胞表面寄生支原体组成。血支原体寄生于多种脊椎动物宿主的红细胞表面，主要通过吸血节肢动物媒介传播。认识到绵羊附红细胞体是一种支原体为处理这种细菌提供了一种新方法。建议将绵羊附红细胞体重新分类为绵羊支原体，新组合。
