PARENTAL DEVELOPMENT OF EIMERIAN COCCIDIA IN SANDHILL AND WHOPPING CRANES
PARENTAL DEVELOPMENT OF EIMERIAN COCCIDIA IN SANDHILL AND WHOPPING CRANES
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DOI：
10.1111/j.1550-7408.1981.tb02844.x
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发表时间：
1981-01-01
期刊：
影响因子：
--
通讯作者：
JEFFERS, TK
中科院分区：
文献类型：
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作者：
NOVILLA, MN;CARPENTER, JW;JEFFERS, TK
与已建立肠外发育阶段的球虫的等孢子型种类相比，艾美球虫，除少数种类外，一般被认为是肠道的居民。美洲）可能导致播散性内脏球虫病。33%（n = 95）的G.在马里兰州月桂的帕塔克森特野生动物研究中心（PWRC）。对六只患病鹤的尸检显示，许多组织和器官中存在肉芽肿结节。组织学研究揭示了原生动物生物体的形态类似于肉芽肿中的寄生虫，并且在四只鸟的肠道中存在球虫的内源性阶段。对4只沙丘鹤中的3只进行粪检，均检出E. ReichenowiandE. gruis.OnlyE.从死亡的高鸣起重机样品中回收reichenowi型卵囊。将约1 × 106个E. ReichenowiandE.没有感染。将6只孵化器孵化和人工饲养的沙丘起重机雏鸡人工（2只雏鸡）和自然（4只雏鸡）暴露于卵囊，导致典型的肠上皮感染，上皮下组织侵入延伸至肌肉层和广泛的肠外发育。无性和有性阶段主要发生在肝、脾、心和肺的巨噬细胞中。在肺中，在支气管渗出物和上皮衬里细胞中发现卵囊。十块六。canadensischicks，1 adultG.美国，和三个fiveG。在PWRC自然死亡的美洲鸡有播散性内脏球虫病。
In contrast with isosporoid species of coccidia that have established extraintestinal phases of development, the eimeriids, except for a few species, generally have been considered inhabitants of the intestinal tract.Eimeriainfection in sandhill cranes (Grus canadensis) and whooping cranes (G. americana) may result in disseminated visceral coccidiosis. Nodules were observed in the oral cavity of 33% (n = 95) of theG. canadensisat the Patuxent Wildlife Research Center (PWRC) in Laurel, MD. Necropsy of six of the afflicted cranes revealed granulomatous nodules in many tissues and organs. Histologic studies disclosed protozoan organisms morphologically resembling schizonts in the granulomas, and endogenous stages of coccidia were present in the intestines of four birds. Fecalysis of three of four sandhill cranes yielded oocysts ofE. reichenowiandE. gruis.OnlyE. reichenowi‐type oocysts were recovered from a dead whooping crane sample. Domestic broiler chicks each intubated with about 1 times 106pooled sporulated oocysts ofE. reichenowiandE. gruiswere not infected. Exposure of six incubator‐hatched and hand‐reared sandhill crane chicks to oocysts artificially (two chicks) and naturally (four chicks) resulted in typical infection of intestinal epithelium with invasion of subepithelial tissues extending to the muscular layer and widespread extraintestinal development. Asexual and sexual stages occurred primarily in macrophages in the liver, spleen, heart, and lung. In the lung, oocysts were found in bronchial exudate and epithelial lining cells. Six of tenG. canadensischicks, one adultG. americana, and three of fiveG. americanachicks that died naturally at PWRC had disseminated visceral coccidiosis.