Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/29645
Title: Dispersion of Lutzomyia longipalpis and expansion of visceral leishmaniasis in Sao Paulo State, Brazil: identification of associated factors through survival analysis
Authors: OLIVEIRA, Agda M.LOPEZ, Rossana V. M.DIBO, Margareth R.RODAS, Lilian A. C.GUIRADO, Marluci M.CHIARAVALLOTI-NETO, Francisco
Citation: PARASITES & VECTORS, v.11, article ID 503, 12p, 2018
Abstract: Background: In Brazil, visceral leishmaniasis (VL) is a serious public health problem because of its magnitude, geographical expansion and potential harms caused by illnesses, including death. However, VL is largely ignored in discussions of tropical disease priorities. Thus, this study aimed to identify factors associated with the expansion of VL and the dispersion of its vector, Lutzomyia longipalpis, in the municipalities of the State of Sao Paulo, Brazil. Methods: Information about the date of vector detection and the confirmation of autochthonous VL occurrence in humans and canines in Sao Paulo were obtained between 1997 and 2014. Survival curves were calculated by the Kaplan-Meier and the Cox multiple regression models was used. Results: The presence of the Marechal Rondon highway showed the highest positive association with vector dispersion and canine and human VL expansion. The monthly maximum and minimum temperature averages recorded in the municipalities during the study period were also positively associated with these events. The presence of transverse highways was positively associated with the presence of the vector; the border with the State of Mato Grosso do Sul, the presence of a prison, microregion headquarters, and the presence of the Tiete River were positively associated with the occurrence of canine cases, while only the presence of prison was positively associated with the occurrence of human cases. The construction of the Bolivia-Brazil gas pipeline was not associated with any events. Conclusions: Survival analysis enabled the identification of factors associated with vector dispersion and VL expansion, thus the results of this study may be useful to the improvement of VL surveillance and control activities in the State of Sao Paulo and throughout Brazil.
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Artigos e Materiais de Revistas Científicas - HC/ICESP
Instituto do Câncer do Estado de São Paulo - HC/ICESP

Artigos e Materiais de Revistas Científicas - LIM/24
LIM/24 - Laboratório de Oncologia Experimental


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