de Souza Viviane Kelin, Dall'Agnol Bruno, Souza Ugo Araújo, Webster Anelise, Peters Felipe Bortolotto, Favarini Marina Ocha, Mazim Fábio Dias, da Rocha Fabiana Lopes, Tirelli Flávia Pereira, Soares João Fábio, de Assis Jardim Márcia Maria, Trigo Tatiane Campos, Reck José
Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF), Estrada do Conde, 6000, mail box 47, Eldorado do Sul, RS, 92990-000, Brazil.
Ticks Saúde Animal e Ambiental, Porto Alegre, RS, Brazil.
Parasitol Res. 2019 Apr;118(4):1337-1342. doi: 10.1007/s00436-019-06245-6. Epub 2019 Feb 18.
Canine rangeliosis is a tick-borne disease caused by the protozoan Rangelia vitalii, which has only been reported in South America. With this knowledge, we hypothesized that neotropical foxes could act as asymptomatic natural carriers of R. vitalii. To test this, we captured 44 free-ranging foxes and investigated the presence of R. vitalii DNA, and whether the infected animals presented any clinical findings or hematological changes. Eight foxes (18%), seven Cerdocyon thous (7/27-25%), and one Lycalopex gymnocercus (1/17-5%) were positive for R. vitalii. All foxes were clinically healthy and showed no hematological abnormalities. Thus, we propose that neotropical canids, particularly C. thous, could be the natural carriers of R. vitalii.
犬类兰氏病是一种由原生动物维塔利兰氏菌引起的蜱传疾病，该疾病仅在南美洲有报道。基于这一认识，我们推测新热带界的狐狸可能是维塔利兰氏菌的无症状自然携带者。为了验证这一点，我们捕获了44只自由放养的狐狸，调查维塔利兰氏菌DNA的存在情况，以及受感染的动物是否有任何临床症状或血液学变化。8只狐狸（18%）、7只食蟹狐（7/27 - 25%）和1只草原狐（1/17 - 5%）的维塔利兰氏菌检测呈阳性。所有狐狸临床健康，未表现出血液学异常。因此，我们认为新热带界的犬科动物，特别是食蟹狐，可能是维塔利兰氏菌的自然携带者。
