Rosypal A C, Cortés-Vecino J A, Gennari S M, Dubey J P, Tidwell R R, Lindsay D S
School of Medicine, Department of Pathology and Laboratory Medicine, CB #7525, Room 805 Brinkhous-Bullitt Building, University of North Carolina at Chapel Hill, Chapel Hill, NC 25799-7525, USA.
Vet Parasitol. 2007 Nov 10;149(3-4):172-7. doi: 10.1016/j.vetpar.2007.08.004. Epub 2007 Sep 7.
Leishmania infantum and Trypanosoma cruzi are zoonotic parasites that are endemic throughout many parts of Latin America. Infected dogs play an important role in transmission of both parasites to humans. A serological survey of Leishmania and Trypanosoma infection was conducted on 365 dogs from São Paulo, Brazil and Bogatá, Colombia, South America. Serum samples were examined by the indirect immunofluorescent antibody test (IFAT). Anti-Leishmania IgG antibodies were detected in 5 of 107 from Brazil (4.7%) and in 4 of 258 dogs (1.6%) from Colombia. Titers ranged from 1:25 to 1:100. Anti-T. cruzi antibodies were not detected in any of the dogs from either Brazil or Colombia. The results show a low prevalence of anti-Leishmania antibodies and no antibodies against T. cruzi in these canine populations. Our study suggests that dogs play a limited role in the spread of L. infantum and T. cruzi in these urban areas of Brazil and Colombia.
婴儿利什曼原虫和克氏锥虫是人畜共患寄生虫,在拉丁美洲的许多地区都有流行。受感染的狗在这两种寄生虫向人类传播中起着重要作用。对来自巴西圣保罗和南美洲哥伦比亚波哥大的365只狗进行了利什曼原虫和锥虫感染的血清学调查。血清样本通过间接免疫荧光抗体试验(IFAT)进行检测。在巴西的107只狗中有5只(4.7%)检测到抗利什曼原虫IgG抗体,在哥伦比亚的258只狗中有4只(1.6%)检测到。滴度范围为1:25至1:100。在来自巴西或哥伦比亚的任何一只狗中均未检测到抗克氏锥虫抗体。结果显示这些犬类群体中抗利什曼原虫抗体的患病率较低,且没有抗克氏锥虫的抗体。我们的研究表明,在巴西和哥伦比亚的这些城市地区,狗在婴儿利什曼原虫和克氏锥虫的传播中作用有限。