Ryan U M, Xiao L, Read C, Sulaiman I M, Monis P, Lal A A, Fayer R, Pavlasek I
Division of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, Western Australia, 6150.
J Parasitol. 2003 Aug;89(4):809-13. doi: 10.1645/GE-74RI.
Cryptosporidium galli Pavlasek, 1999, described from the feces of birds, is redescribed with additional molecular and biological data. Oocysts are ellipsoidal, are passed fully sporulated, lack sporocysts, and measure 8.25 x 6.3 microm (range 8.0-8.5 x 6.2-6.4 microm) with a length-width ratio of 1.30 (n = 50). Oocysts are structurally similar to those of Cryptosporidium baileyi described from chickens, but in addition to being considerably larger than oocysts of C. baileyi, these oocysts infect the proventriculus in a variety of birds and not the respiratory tract. Oocysts were successfully transmitted from chickens to chickens, and morphologically similar oocysts also were observed in a variety of exotic and wild birds (Order Passeriformes, Phasianidae, Fringillidae, and Icteridae). Molecular and phylogenetic analyses at the 18S rRNA, HSP70, and actin gene loci demonstrate that this species is genetically distinct from all known species and genotypes of Cryptosporidium and, thus, was named C. galli.
1999年从鸟类粪便中发现的鸡隐孢子虫（Cryptosporidium galli Pavlasek），现依据更多分子和生物学数据进行重新描述。卵囊呈椭圆形，排出时已完全孢子化，无孢子囊，大小为8.25×6.3微米（范围8.0 - 8.5×6.2 - 6.4微米），长宽比为1.30（n = 50）。卵囊在结构上与从鸡体内发现的贝氏隐孢子虫（Cryptosporidium baileyi）的卵囊相似，但除了比贝氏隐孢子虫的卵囊大得多外，这些卵囊感染多种鸟类的腺胃而非呼吸道。卵囊已成功从鸡传播至鸡，并且在多种外来鸟类和野生鸟类（雀形目、雉科、雀科和拟黄鹂科）中也观察到形态相似的卵囊。对18S rRNA、HSP70和肌动蛋白基因位点的分子和系统发育分析表明，该物种在基因上与隐孢子虫属的所有已知物种和基因型不同，因此被命名为鸡隐孢子虫。
