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Previous issue date: 2017-02-14 === CAPES === Hemotrophic mycoplasmas hemoparasites are pleomorphic, epicellular, gram negative organisms that are located on the surface of erythrocytes of several species. In dogs, hemoplasma infection can cause hemolytic anemia in the acute phase, while in the chronic phase the signs are generally inapparent, and immunosuppression can trigger the acute disease. The present study aimed to detect molecularly the presence of hemotrophic mycoplasma agents in domestic dogs from the urban and rural areas of Aragua?na, Tocantins and, in addition, to correlate hematological alterations and factors associated with natural infection. In the analysis of the results, 2.9% (3/105) of the dogs sampled from the urban area and 24.49% (24/99) from the rural area were positive for Mycoplasma spp. by the Real Time Polymerase Chain Reaction (qPCR). The frequency of hemoplasmas species infection by PCR using species-specific oligonucleotides was 1.9% (2/105) and 13.26% (13/99) for Mycoplasma haemocanis in the urban and rural areas, respectively. No positive dogs were observed for ?Candidatus Mycoplasma turicensis? and ?Candidatus Mycoplasma haematoparvum?/?Candidatus Mycoplasma haemominutum? in both areas studied. Regarding hematological alterations, there was no statistical association with the infection by Mycoplasma spp. Similarly, among the analyzed variables (age, gender, racial pattern, site cleanliness and housing), no statistical correlation was observed in either urban or rural areas. This is the first report of the molecular detection of Mycoplasma haemocanis in dogs from Tocantins and opens up prospects for future studies in this group of hemotrophic agents. === Os hemoparasitos micoplasmas hemotr?ficos s?o organismos pleom?rficos, epicelulares, Gram negativos, que se localizam na superf?cie dos eritr?citos de diversas esp?cies. Em c?es, a infec??o pelos hemoplasmas pode causar anemia hemol?tica na fase aguda, enquanto na doen?a cr?nica os sinais em geral s?o inaparentes, sendo que a imunossupress?o pode desencadear a doen?a aguda. O presente estudo objetivou detectar molecularmente a presen?a de infec??o pelos agentes micoplasmas hemotr?ficos em c?es dom?sticos procedentes de ?reas urbana e rural de Aragua?na, Tocantins e, adicionalmente correlacionar as altera??es hematol?gicas e fatores associados com a infec??o natural. Na an?lise dos resultados obtidos, 2,9% (3/105) dos c?es amostrados da ?rea urbana e 24,49% (24/99) da ?rea rural foram positivos pela Rea??o em Cadeia da Polimerase em Tempo Real (qPCR) para Mycoplasma spp. A frequ?ncia de infec??o das esp?cies de hemoplasmas pela PCR, utilizando oligonucleot?deos esp?cie-espec?ficos, foi de 1,9 % (2/105) e 13,26% (13/99) para Mycoplasma haemocanis na ?rea urbana e rural, respectivamente. N?o foram observados c?es positivos para ?Candidatus Mycoplasma turicensis? e ?Candidatus Mycoplasma haematoparvum?/?Candidatus Mycoplasma haemominutum? em ambas as ?reas estudadas. No tocante ?s altera??es hematol?gicas, n?o houve associa??o estat?stica com a infec??o por Mycoplasma spp. De modo semelhante, dentre as vari?veis analisadas (idade, sexo, padr?o racial, limpeza do local e moradia) n?o foi verificada qualquer correla??o estat?stica com a infec??o pelo agente Mycoplasma spp., seja na ?rea urbana ou na rural. Esta constitui a primeira detec??o molecular de Mycoplasma haemocanis em c?es do Tocantins e abre perspectivas para futuros estudos neste grupo de agentes hemotr?ficos.
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