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首页> 外文期刊>Veterinary Parasitology >Studies of trichomonad protozoa in free ranging songbirds: Prevalence of Trichomonas gallinae in house finches (Carpodacus mexicanus) and corvids and a novel trichomonad in mockingbirds (Mimus polyglottos)
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Studies of trichomonad protozoa in free ranging songbirds: Prevalence of Trichomonas gallinae in house finches (Carpodacus mexicanus) and corvids and a novel trichomonad in mockingbirds (Mimus polyglottos)

机译：自由放飞鸣鸟中毛滴虫的研究：家雀（Carpodacus mexicanus）和柯维犬中的鸡毛滴虫的流行，以及模仿鸟（Mimus polyglottos）中的新毛滴虫的流行

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This study refutes the accepted dogma that significant pathogenic effects of Trichomonas gallinae are limited to columbiformes and raptors in free ranging bird populations in North America. Trichomonads were associated with morbidity and mortality amongst free ranging house finches (Carpodacus mexicanus), mockingbirds (Mimus polyglottos) and corvids (scrub jay: Aphelocoma californica; crow: Corvus brachyrhynchos; raven: Corvus corax) in northern California. Prevalence of trichomonad infection was 1.7% in house finches, 0-6.3% in corvids, and 0.9% in mockingbirds. Bird case fatality ratio was 95.5% in house finches, 0-100.0% in corvids, and 37.5% in mockingbirds. DNA sequences of parasites in house finches and corvids were identical to T. gallinae strain g7 (GeneBank AY349182.1) for the 5.8s ribosome. DNA sequences of parasites cultured from two mockingbirds were genetically distinct from that of available sequenced trichomonads. These isolates were clearly phylogenetically more closely related to the Trichomonadinae than the Tritrichomonadinae. While molecular techniques were required to differentiate between trichomonad species, wet mount preparations from the oral cavity/crop were a reliable and inexpensive method of screening for trichomonad infections in these species. Positive wet mount tests in house finches and corvids living in northern California were highly likely to indicate infection with T. gallinae, while in mockingbirds positive wet mounts most likely indicated a trichomonad other than T. gallinae.
机译：这项研究驳斥了公认的教条，即北美毛滴虫的重大致病作用仅限于北美自由放养鸟类中的柱状目和猛禽。滴虫病与加利福尼亚北部的自由放养的家雀（Carpodacus mexicanus），bird鸟（Mimus polyglottos）和科比犬（scrub jay：Aphelocoma californica;乌鸦：Corvus brachyrhynchos; raven：Corvus corax）的发病率和死亡率有关。雀科的毛滴虫感染的患病率为1.7％，cor的感染率为0-6.3％，mock鸟的感染率为0.9％。雀鸟的家禽死亡率为95.5％，cor的为0-100.0％，mock鸟的为37.5％。雀和cor体内寄生虫的DNA序列与5.8s核糖体的鸡蝇T. gallinae g7（GeneBank AY349182.1）相同。从两只知更鸟中培养出来的寄生虫的DNA序列在遗传上与可用的已测定滴虫的序列不同。这些分离物与毛滴虫的亲缘关系显然比毛滴虫更紧密。尽管需要分子技术来区分滴虫，但从口腔/作物中获得的湿装制剂是一种可靠且廉价的筛查滴虫的方法。在居住在加利福尼亚州北部的雀科和科菲犬中，湿坐骑试验呈阳性的可能性很高，表明已感染了鸡毛癣菌，而在positive鸟中，湿坐菌呈阳性表达的可能性很可能是鸡毛癣菌以外的毛滴虫。

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