Molecular detection of Rickettsia genus in chigger mites (Trombidiformes: Trombiculidae) collected on small mammals in southeastern brazilian

Autor(es)

Jacinavicius, Fernando de Castro ; Bassini-Silva, Ricardo ; Munoz-Leal, Sebastian ; Welbourn, Cal ; Ochoa, Ronald ; Labruna, Marcelo Bahia ; Barros-Battesti, Darci Moraes

• Tipo de documento: Artigo Científico
• Fonte: REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA; v. 28, n. 4, p. 6-pg., 2019-10-01.

Resumo

Chiggers are ecto parasitcs of vertebrates and may cause trombiculiasis or transmit pathogens to their hosts. Specimens collected from rodents and marsupials were morphologically identified as Herpetacarus hertigi, Eutrombicula tinami, Kymocta sp., Quadraseta brasiliensis, Quadraseta falconensis, Quadraseta flochi, Quadraseta mackenziei, Quadraseta pazca, Quadraseta trapezoides, Quadraseta sp., Serratacarus sp., and Trombewingia bakeri. These mites were submitted individually to molecular analyses for the detection of bacteria of the genus Coxiella, Hepatozoon and Rickettsia. Samples were positive to Rickettsia only. Obtained sequences for the gltA (350 pb) and ompA (488 pb) genes were identical to "Candidatus Rickettsia colombianensi", a species previously detected in ticks. In addition, molecular identification of mites based on 18S rDNA sequences are provided for H. hertigi, Kymocta sp., Q. brasiliensis, Q. pazca, Q. trapezoides, Quadraseta sp., and T. bakeri for the first time. This is the first report of the detection of a Rickettsia sp. in chigger mites collected on rodents in Brazil. (AU)

• Processo FAPESP: 17/01416-7 - Ácaros trombiculídeos de aves brasileiras: estudos morfológicos e investigação da presença de patógenos associados
• Beneficiário: Ricardo Bassini Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/51875-9 - Síndrome Baggio-Yoshinari: investigação epidemiológica com vistas ao isolamento e caracterização do agente etiológico
• Beneficiário: Darci Moraes Barros-Battesti
• Modalidade de apoio: Auxílio à Pesquisa - Regular