Couch Lee, Laakkonen Juha, Goodman Steven, Duszynski Donald W
Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA.
J Parasitol. 2011 Apr;97(2):293-6. doi: 10.1645/GE-2611.1. Epub 2010 Oct 8.
Fecal samples from 126 insectivorous mammals in Madagascar were collected between spring 1999 and fall 2001. In the Afrosoricida, 21 species in 5 genera were sampled, including 17 species of Microgale (31/96, 32% infected), Hemicentetes semispinosus (1/2, 50%), Oryzorictes hova (1/5, 20%), Setifer setosus (8/13, 61.5%), and Tenrec ecaudatus (5/8, 62.5%); in the Soricomorpha, only Suncus murinus was examined and 1/2 (50%) were infected. Two morphotypes of eimeriid oocysts, representing 2 presumptive new species, were found in 47 (37%) infected animals; only 2 afrosoricid hosts (2% of all hosts, 4% of infected hosts) had both oocyst morphotypes. Sporulated oocysts of the first morphotype, Eimeria tenrececaudata n. sp., are subspheroidal, 18.8 × 17.4 (17-22 × 15-20), with a length∶width ratio (L/W) of 1.1 (1.0-1.2); they lack a micropyle but may contain 0-2 polar granules and a single, small round oocyst residuum, 3 × 2.3. Sporocysts are lemon-shaped, 9.9 × 6.6 (9-11 × 5-8), with a L/W of 1.5 (1.2-2.0); they have a prominent, slightly flattened Stieda body and a substieda body but lack a parastieda body. The sporocyst residuum consists of only a few granules between the sporozoites, which are sausage-shaped and have a large posterior refractile body. Oocysts of the second morphotype, Eimeria setifersetosa n. sp. are spheroidal to subspheroidal, 30.1 × 28.6 (27-34 × 25-34), with a L/W of 1.1 (1.0-1.2); they lack both micropyle and oocyst residuum, but 1-2 polar granules are usually present. Sporocysts are subspheroidal to broadly ellipsoidal, 9.6 × 7.3 (9-11 × 6-8), with a L/W of 1.3 (1.1-1.7); they have a broad Stieda body, lack sub- and parastieda bodies, and have a residuum of a few granules scattered throughout the sporocyst. Sporozoites were not clearly defined, but what seemed to be a single large refractile body is seen, presumably in each sporozoite.
1999年春季至2001年秋季期间，从马达加斯加的126只食虫哺乳动物身上采集了粪便样本。在非洲猬目动物中，对5个属的21个物种进行了采样，包括17种小麝鼩（31/96，32% 感染）、半刺猬（1/2，50%）、霍氏稻田猬（1/5，20%）、刚毛猬（8/13，61.5%）和无尾猬（5/8，62.5%）；在鼩形目动物中，仅检查了臭鼩，其中1/2（50%）被感染。在47只（37%）受感染动物中发现了两种艾美球虫卵囊形态型，代表2个推测的新物种；只有2只非洲猬目宿主（占所有宿主的2%，受感染宿主的4%）同时具有两种卵囊形态型。第一种形态型的孢子化卵囊，即尾猬艾美球虫新种，呈近球形，大小为18.8×17.4（17 - 22×15 - 20），长宽比（L/W）为1.1（1.0 - 1.2）；它们没有卵孔，但可能含有0 - 2个极粒和一个单个的小圆形卵囊残体，大小为3×2.3。孢子囊呈柠檬形，9.9×6.6（9 - 11×5 - 8），L/W为1.5（1.2 - 2.0）；它们有一个突出的、稍扁平的斯氏体和一个亚斯氏体，但没有副斯氏体。孢子囊残体仅由子孢子之间的少数颗粒组成，子孢子呈香肠形，有一个大的后折光体。第二种形态型的卵囊，即刚毛刺猬艾美球虫新种，呈球形至近球形，30.1×28.6（27 - 34×25 - 34），L/W为1.1（1.0 - 1.2）；它们既没有卵孔也没有卵囊残体，但通常有1 - 2个极粒。孢子囊呈近球形至宽椭圆形，9.6×7.3（9 - 11×6 - 8），L/W为1.3（1.1 - 1.7）；它们有一个宽的斯氏体，没有亚斯氏体和副斯氏体，并且有一些颗粒状残体散布在整个孢子囊中。子孢子没有清晰界定，但似乎可以看到一个单个的大折光体，大概在每个子孢子中。
