Urban distribution of Phlebotominae in a cutaneous leishmaniasis focus, Argentina

Oscar D Salomón, María G Quintana, Mario Zaidenberg
2008 Memórias do Instituto Oswaldo Cruz  
Urbanization and vector domestication are currently proposed as factors that contributed to the recent increase of American cutaneous leishmaniasis (ACL). Is likely also urban transmission? Oran is the main city in the Argentinean hyper-endemic area of ACL, and human cases in urban residences are usually reported. In order to assess the spatial distribution of risk, phlebotomine traps were located in different environments of Oran. A total of 7,787 sand flies were captured: Lutzomyia neivai
more » ... 1%), Lutzomyia migonei (1.2%), Lutzomyia cortelezzii (0.7%), and one Lutzomyia shannoni. During the season of transmission (April-May) a single sand fly was obtained in one out of five urban sites, while a trap in a peri-urban pigsty captured up to 2,985 Lu. neivai/night. Captures performed in the other season of vector activity (September-October) revealed that small-scale changes in the pigsty environment resulted in noticeable changes in the abundance of Lu. neivai. In addition, in a new neighbourhood, on the fringe of the city, 1,073 Lu. neivai/ site were captured in the forested edge but one in the yard of the houses. Therefore, in this urban ACL focus the humanvector effective contact risk is still associated with peri-urban vegetation and ecotone modifications despite the urban residence of the cases.
doi:10.1590/s0074-02762008005000016 pmid:18545855 fatcat:jxowxuzmifajplgsusemxh4344