Lemos Tatiana Didonet, Toma Helena Keiko, Assad Renata Quintela, Silva Adrianna Vieira da, Corrêa Rafael Gomes Bartolomeu, Almosny Nádia Regina Pereira
Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense - UFF, Niterói, RJ, Brasil.
Laboratório de Diagnóstico Molecular e Hematologia, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brasil.
Rev Bras Parasitol Vet. 2017 Jul-Sep;26(3):307-313. doi: 10.1590/S1984-29612017040. Epub 2017 Aug 24.
Rangelia vitalii, a tick-borne piroplasm that infects dogs, has been recently molecularly characterized in Brazil, Uruguay and Argentina. Studies on molecular characterization of these piroplasms in different Brazilian regions are scarce. The aim of this study was to evaluate clinical and hematological changes in dogs caused by R. vitalii in the mountainous region of the state of Rio de Janeiro. Blood samples from 36 dogs were evaluated for piroplasms and hematological disorders using light microscopy and molecular analysis. Blood samples from all the animals included in this study were confirmed to be positive for R. vitalii through genetic sequencing. Clinical signspresented by 24 of the 36 dogs of the study were evaluated during appointments or hospitalization within private practice. The most frequent clinical disorders in these dogs that were naturally infected with R. vitalii were fever, spontaneous cutaneous bleeding and diarrhea. Normochromic non-regenerative anemia and thrombocytopenia were the most common hematological disorders in these R. vitalii-positive dogs and therefore should be considered in hematological evaluations on suspected cases.
维塔利兰吉亚热原虫是一种通过蜱传播的梨形虫，可感染犬类，最近在巴西、乌拉圭和阿根廷进行了分子特征鉴定。在巴西不同地区对这些梨形虫进行分子特征研究的较少。本研究的目的是评估里约热内卢州山区由维塔利兰吉亚热原虫引起的犬类临床和血液学变化。使用光学显微镜和分子分析对36只犬的血液样本进行梨形虫和血液学疾病评估。通过基因测序证实本研究中所有动物的血液样本维塔利兰吉亚热原虫呈阳性。在私人诊所就诊或住院期间，对研究中36只犬中的24只所表现出的临床症状进行了评估。这些自然感染维塔利兰吉亚热原虫的犬类中最常见的临床疾病是发热、自发性皮肤出血和腹泻。正色素性非再生性贫血和血小板减少症是这些维塔利兰吉亚热原虫阳性犬中最常见的血液学疾病，因此在对疑似病例进行血液学评估时应予以考虑。
