Epidemiology of Visceral Leishmaniasis in a Reemerging Focus of Intense Transmission in Minas Gerais State, Brazil

• Main Authors: Ricardo Andrade Barata, Jennifer Cunha Peixoto, Aline Tanure, Marcela Esteves Gomes, Estefânia Conceição Apolinário, Emerson Cotta Bodevan, Holbiano Saraiva de Araújo, Edelberto Santos Dias, Aimara da Costa Pinheiro
• Format: Article
• Language: English
• Published: Hindawi Limited 2013-01-01
• Series: BioMed Research International
• Online Access: http://dx.doi.org/10.1155/2013/405083

This study was developed in the urban area of Governador Valadares, a reemerging focus of intense transmission of visceral leishmaniasis (VL) in Brazil, presenting 86 human cases of VL from 2008 to 2011. The disease prevailed in males (73.2%) with most patients between 0 and 9 years (44.1%) and a lethality rate of 16.2%. A canine survey was carried out on 16,529 domestic dogs in 35 districts in the area and it showed that 30.2% of them (4,992 dogs) were positive for VL by serum assays. Prevalence ratios for canine VL varied between 13.6% and 53.4%. The clinical exam of 343 seropositive dogs showed that 49.9% of them were considered symptomatic, with larger prevalence of canine VL being in short-furred animals (90%). The entomological survey was performed in eight districts, where 2,539 phlebotomines were captured, preferentially in the peridomicile (84.5%). Lutzomyia longipalpis was the predominant species (90%) suggesting its participation in the VL transmission in the area. The correlation between canine prevalence and L. longipalpis density was evaluated.