The rupestrian Triatoma costalimai species has been found infected by Trypanosoma cruzi in wild, peridomicile, and intradomicile environments in the municipality of Aurora do Tocantins, Tocantins, Brazil. Proximity between rock outcrops increases the risk of vector transmission of Chagas disease via this species. This work describes a focus of colonization by T. costalimai specimens infected by T. cruzi in rock outcrops located in an urban area in this municipality. Parasitological examination of feces from the collected specimens, axenic cultivation of T. cruzi-positive samples, and genetic characterization of the isolates were performed. Nymph and adult specimens were collected with a high infection prevalence (64.5%) for T. cruzi discrete type unit (DTU I). Participation of the T. costalimai species in the wild cycle of T. cruzi in rock outcrops located in an urban area demonstrates the need for entomological surveillance and control of vector transmission of Chagas disease in the municipality of Aurora do Tocantins, Tocantins.
ResumoDevido a uma suspeita de Doença de Lyme-símile em humano, na região de Goiatins, Tocantins, foi realizada uma investigação epidemiológica em oito localidades dessa região, AbstractDue to a suspected human case of Brazilian Lyme-like disease in the city of Goiatins, Tocantins State, an epidemiological survey was carried out in eight counties in this region during September 2007 and February 2008, where 1,890 ticks were collected from domestic animals and from the environment. A total of eight tick species were identified: Rhipicephalus sanguineus, Rhipicephalus (Boophilus) microplus, Dermacentor nitens, Amblyomma cajennense, Amblyomma oblongoguttatum, Amblyomma ovale, Amblyomma parvum and Amblyomma tigrinum. The last four species were described for the first time in this region. Although human parasitism by ticks is frequently described in Goiatins, no ticks collected from humans were analyzed. The study of ixodids in this region contributes with the survey of Brazilian ticks, as well as the elucidation of the possible transmission of the agent that caused the Brazilian Lyme-like disease case in Goiatins.
A tuberculose bovina é uma doença infecciosa crônica e debilitante que pode infectar humanos. Uma importante etapa para o controle é a determinação da prevalência nos rebanhos. O objetivo do presente trabalho foi determinar a prevalência da tuberculose bovina em Mossoró, RN. Inicialmente foi realizada uma avaliação de risco para a ocorrência da tuberculose bovina em 21 propriedades da região avaliada. Foram testadas 150 vacas leiteiras por meio do teste da prega caudal. Também foram avaliados outros 120 bovinos pelo teste da tuberculinização cervical comparada. Os resultados revelaram falta de conhecimento dos proprietários sobre o controle da doença, bem como o descuido no momento da aquisição de animais. A prevalência foi de 8,66% e 3,33% nos testes da prega caudal e cervical comparativo, respectivamente. Assim, foi verificada uma prevalência de tuberculose bovina bastante elevada, sendo superior à média nacional.
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