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首页> 外文期刊>Journal of Parasitology >Persistence of Hepatozoon americanum (Apicomplexa: Adeleorina) in a Naturally Infected Dog
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Persistence of Hepatozoon americanum (Apicomplexa: Adeleorina) in a Naturally Infected Dog

机译：在自然感染的狗中的美洲肝炎（Apicomplexa：Adeleorina）的持久性

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To determine the persistence of Hepatozoon americanum in a naturally infected dog, skeletal muscle biopsies were performed at approximately 6-mo intervals over a period of 5.5 yr, and the samples were examined for presence of lesions of American canine hepatozoonosis (ACH). Nymphal Amblyomma maculatum (Gulf Coast tick) were allowed to feed to repletion on the dog periodically over the 5.5-yr period, and adult ticks were dissected and examined for presence of H. americanum oocysts. With 3 exceptions, the biopsied muscle contained lesions characteristic of ACH; no evidence of infection was found at 36, 54, and 67 mo after the original diagnosis. In every instance, nymphal Gulf Coast ticks became infected, indicating that dogs naturally infected with H. americanum can remain infectious for Gulf Coast ticks for at least 5.5 yr. Skeletal muscle biopsy is a reasonably reliable method of determining whether dogs are infected with the parasite. Xenodiagnosis using nymphal Gulf Coast ticks is an even more sensitive method, but the procedure is practicable only experimentally. Design of prevention and control measures for ACH must take into account knowledge that the parasite can survive in dogs, and presumably other vertebrate host(s), for long periods. Preventing ingestion of Gulf Coast ticks is an effective control measure.
机译：为了确定在自然感染的狗中美洲肝炎的持久性，在5.5年的时间内以大约6个月的间隔对骨骼肌进行活检，并检查样本中是否存在美洲犬肝炎（ACH）病变。在5.5岁的时期内，定期给斑y（Amblyomma maculatum）（海湾沿岸tick）喂食，以补充其食物，并解剖成年tick并检查美洲H虫卵囊的存在。除3个例外，活检的肌肉均包含ACH的特征性病变。最初诊断后36、54和67个月未发现感染迹象。在每种情况下，若虫墨西哥湾沿岸壁虱都被感染，这表明自然感染了美洲嗜血杆菌的狗在墨西哥湾沿岸壁虱中可以保持至少5.5年的传染性。骨骼肌活检是确定狗是否感染了寄生虫的合理可靠的方法。使用若虫墨西哥湾沿岸tick进行异种诊断是一种更为灵敏的方法，但该程序仅在实验上可行。 ACH的预防和控制措施的设计必须考虑到这种知识，即该寄生虫可以在狗中以及可能在其他脊椎动物宿主中长期存活。防止摄入墨西哥湾沿岸s是一种有效的控制措施。

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