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首页> 外文期刊>Zoonoses and Public Health >Infection by Spotted Fever Rickettsiae in People, Dogs, Horses and Ticks in Londrina, Parana State, Brazil
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Infection by Spotted Fever Rickettsiae in People, Dogs, Horses and Ticks in Londrina, Parana State, Brazil

机译：巴西巴拉那州隆德里纳的人，狗，马和Ti中发现有发烧立克次体感染

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摘要

Spotted fever is a disease caused by bacteria from the genus Rickettsia of the spotted fever group (SFG). Rickettsia rickettsii is likely the main agent of Brazilian spotted fever (BSF). With the objective of gathering information on the circulation of SFG rickettsiae in Londrina, Parana state, ticks from dogs and horses and also blood from dogs, horses and humans were collected in a neighbourhood of the city which presented potential for circulation of rickettsiae between hosts and vectors. Amblyomma cajennense, Dermacentor nitens, and Rhipicephalus sanguineus ticks were subjected to Polymerase Chain Reaction targeting a fragment of the Rickettsia gltA gene. This specific gene encodes the enzyme citrate synthase of Rickettsia spp., and results on all ticks were negative. Human and animal sera were tested by Indirect Immunofluorescence Assay in which R. rickettsii and R. parkeri were used as antigens. Sera from 4.7% human, 2.7% canine and 38.5% equine were positive for R. rickettsii. For R. parkeri, 0.9% human, 2.7% canine and 11.5% equine samples were positive. All samples reactive to R. parkeri also reacted to R. rickettsii. An epidemiological questionnaire was applied, but there were no statistically significant results. Comparison of our serological results with previous studies in Brazil, among BSF endemic and non-endemic areas, indicates that there is no established rickettsial infection in the study area, a statement corroborated with our molecular analysis. Nonetheless, as humans of the present study are highly exposed to tick infestations, health education within the population is needed to obtain efficient tick control. Zoonoses and Public Health 416 (C) 2011 Blackwell Verlag GmbH . Zoonoses Public Health. 58 (2011) 416-423
机译：斑点热是由斑点热组（SFG）的立克次氏菌属细菌引起的疾病。立克次体立克次体可能是巴西斑疹热（BSF）的主要病原体。为了收集有关巴拉那州隆德里纳的SFG立克次体循环的信息，在该城市附近收集了狗和马的tick以及狗，马和人的血液，这显示了寄主和人之间立克次体的传播潜力。向量。对cabennense菌，Dermacentor nitens和Rhipicephalus sanguineus的s进行聚合酶链反应，靶向立克次体gltA基因的一个片段。该特定基因编码立克次体的柠檬酸合酶，所有壁虱的结果均为阴性。通过间接免疫荧光测定法检测人和动物的血清，其中使用立克氏立克次体和R. parkeri作为抗原。来自立克次体的人血清为4.7％，犬为2.7％，马为38.5％。对于R. parkeri，人类为0.9％，犬为2.7％，马为11.5％。所有与R. parkeri反应的样品也与R. rickettsii反应。应用了流行病学调查表，但没有统计学上显着的结果。我们将血清学结果与先前在巴西进行的BSF流行病地区和非流行病地区的血清学结果进行比较，表明研究区域内没有确定的立克次氏体感染，这与我们的分子分析相符。然而，由于本研究的人类高度暴露于虱子感染，因此需要在人群中进行健康教育以获得有效的虱子控制。人畜共患病与公共卫生416（C）2011 Blackwell Verlag GmbH。人畜共患病公共卫生。 58（2011）416-423

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