Hill T P, Duszynski D W
J Protozool. 1986 May;33(2):282-8. doi: 10.1111/j.1550-7408.1986.tb05607.x.
Since May 1979, 190 rodents in the family Sciuridae, representing three genera and nine species, have been collected in the western United States and northern Mexico and examined for coccidia; 71 (37%) had coccidian oocysts in their feces. These included 2 of 12 (17%) Eutamias canipes; 7 of 12 (58%) E. dorsalis; 18 of 50 (36%) E. merriami; 33 of 96 (34%) E. obscurus; 3 of 4 (75%) E. townsendii; 3 of 9 (33%) Sciurus aberti; 1 of 1 S. griseus; 1 of 1 Tamiasciurus hudsonicus mogollonensis; and 3 of 5 (60%) T. mearnsi. The following coccidians were identified from infected rodents: Eimeria cochisensis n. sp. and Eimeria dorsalis n. sp. from E. canipes, E. cochisensis, E. dorsalis, and E. tamiasciuri from E. dorsalis, E. dorsalis and E. tamiasciuri from E. merriami; E. cochisensis, E. dorsalis, E. tamiasciuri, and E. wisconsinensis from E. obscurus; E. cochisensis and E. dorsalis from E. townsendii; E. ontarioensis and E. tamiasciuri from S. aberti; E. tamiasciuri from S. griseus; E. tamiasciuri and E. toddi from T. h. mogollonensis; and E. tamiasciuri from T. mearnsi. Sporulated oocysts of Eimeria dorsalis n. sp. were ovoid, 21.9 x 16.8 (17-24 x 14-20) micrometer with sporocysts ovoid, 11.5 x 6.9 (10-14 x 6-8) micrometer. Sporulated oocysts of Eimeria cochisensis n. sp. were spheroid to subspheroid, 16.7 x 15.3 (15-18 x 14-17) micrometer, with sporocysts ovoid, 8.4 x 5.6 (6-11 x 4-7) micrometer. Fifty-five of 71 (77%) infected hosts had oocysts of only one eimerian species in their feces at the time they were examined. One eimerian, E. tamiasciuri, was found in seven of nine host species in three genera. A list is provided of all eimerians (22, including the species described here) that have been described in the literature from Eutamias, Sciurus, and Tamiasciurus spp.
自1979年5月以来，在美国西部和墨西哥北部收集了190只松鼠科啮齿动物，分属3个属9个物种，并对其进行了球虫检查；71只（37%）粪便中含有球虫卵囊。其中包括12只加州花栗鼠（Eutamias canipes）中的2只（17%）；12只背纹花栗鼠（E. dorsalis）中的7只（58%）；50只梅氏花栗鼠（E. merriami）中的18只（36%）；96只暗花栗鼠（E. obscurus）中的33只（34%）；4只汤氏花栗鼠（E. townsendii）中的3只（75%）；9只阿氏松鼠（Sciurus aberti）中的3只（33%）；1只灰松鼠（S. griseus）；1只莫戈隆美洲红松鼠（Tamiasciurus hudsonicus mogollonensis）；以及5只梅氏美洲红松鼠（T. mearnsi）中的3只（60%）。从受感染的啮齿动物中鉴定出以下球虫：来自加州花栗鼠的科奇斯艾美耳球虫（Eimeria cochisensis）新种和背纹艾美耳球虫（Eimeria dorsalis）新种；来自背纹花栗鼠的科奇斯艾美耳球虫、背纹艾美耳球虫和美洲红松鼠艾美耳球虫（E. tamiasciuri）；来自梅氏花栗鼠的背纹艾美耳球虫和美洲红松鼠艾美耳球虫；来自暗花栗鼠的科奇斯艾美耳球虫、背纹艾美耳球虫、美洲红松鼠艾美耳球虫和威斯康星艾美耳球虫（E. wisconsinensis）；来自汤氏花栗鼠的科奇斯艾美耳球虫和背纹艾美耳球虫；来自阿氏松鼠的安大略艾美耳球虫（E. ontarioensis）和美洲红松鼠艾美耳球虫；来自灰松鼠的美洲红松鼠艾美耳球虫；来自莫戈隆美洲红松鼠的美洲红松鼠艾美耳球虫和托德艾美耳球虫（E. toddi）；以及来自梅氏美洲红松鼠的美洲红松鼠艾美耳球虫。背纹艾美耳球虫新种的孢子化卵囊呈卵圆形，大小为21.9×16.8（17 - 24×14 - 20）微米，孢子囊呈卵圆形，大小为11.5×6.9（10 - 14×6 - 8）微米。科奇斯艾美耳球虫新种的孢子化卵囊呈球形至近球形，大小为16.7×15.3（15 - 18×14 - 17）微米，孢子囊呈卵圆形
