Lainson Ralph, Carneiro Liliane A, Silveira Fernando T
Departamento de Parasitologia, Instituto Evandro Chagas, Belém, PA, Brasil.
Mem Inst Oswaldo Cruz. 2007 May;102(2):183-9. doi: 10.1590/s0074-02762007005000008.
Redescriptions are given of the mature oocysts of Eimeria aguti Carini 1935, E. cotiae Carini, 1935 and E. paraensis Carini, 1935, in the faeces of five specimens of the rodent Dasyprocta leporina (Rodentia: Dasyproctidae) from the state of Pará, North Brazil. New information is provided on the sporulation time of these parasites and the prepatent period in experimentally infected D. leporina. Some endogenous stages of E. cotiae are described in the epithelial cells of the ileum, and the absence of any oocysts in the gall-bladder contents of the infected animals indicates that the intestine is also the site of development of E. aguti and E. paraensis. Difficulties in separating E. cotiae and E. paraensis on morphology of the oocysts are discussed. The oocysts of both parasites share many structural features and have a wide size range. It is concluded that although it is at present best to maintain these names, the possibility exists that they were separately given to oocysts of smaller dimensions (E. cotiae) and larger dimensions (E. paraensis) of a single parasite. Location of an endogenous site of development for E. paraensis that is distinctly separate from that of E. cotiae might establish more definitely the separate specific status of the two parasites.
对来自巴西北部帕拉州的5只豚鼠（啮齿目：豚鼠科）粪便中的1935年卡里尼艾美耳球虫、1935年科蒂艾美耳球虫和1935年帕拉艾美耳球虫的成熟卵囊进行了重新描述。提供了这些寄生虫的孢子化时间以及实验感染豚鼠的潜伏期的新信息。描述了科蒂艾美耳球虫在回肠上皮细胞中的一些内发育阶段，并且感染动物胆囊内容物中未发现任何卵囊，这表明肠道也是卡里尼艾美耳球虫和帕拉艾美耳球虫的发育部位。讨论了根据卵囊形态区分科蒂艾美耳球虫和帕拉艾美耳球虫的困难。这两种寄生虫的卵囊具有许多结构特征，并且大小范围很广。得出的结论是，尽管目前最好保留这些名称，但有可能它们分别被用于单一寄生虫较小尺寸（科蒂艾美耳球虫）和较大尺寸（帕拉艾美耳球虫）的卵囊。确定帕拉艾美耳球虫与科蒂艾美耳球虫明显不同的内发育部位可能会更明确地确定这两种寄生虫的独立种的地位。
