Tegumentary leishmaniasis outbreak in Bella Vista City, Corrientes, Argentina during 2003

Bella Vista City, Corrientes, Argentina, reported an epidemic outbreak of tegumentary leishmaniasis during 2003. The mean age of the 31 cases was 25.0 ± 13.7 years old, with a sex ratio male:female 1.8, and without mucosal involvement. They clustered in two contiguous neighbourhoods, 96% in the peri...

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Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 2006-11, Vol.101 (7), p.767-774
Main Authors: Salomon, O D, Sergio, S-E, Ramos, K, Orellano, P W, Sanguesa, G, Fernandez, G, Sinagra, A, Rapasciolli, G
Format: Article
Language:English
Subjects:
Adolescent
Adult
Animals
Argentina
Argentina - epidemiology
Child
Child, Preschool
Cluster Analysis
Disease Outbreaks
ecoepidemiology
Female
Humans
Infant
Insect Vectors - classification
leishmaniasis
leishmaniasis - Lutzomyia neivai - urbanization - ecoepidemiology - Argentina
Leishmaniasis, Cutaneous - epidemiology
Leishmaniasis, Cutaneous - transmission
Lutzomyia neivai
Male
Middle Aged
PARASITOLOGY
Psychodidae - classification
Risk Factors
TROPICAL MEDICINE
Urban Population
urbanization
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Summary:Bella Vista City, Corrientes, Argentina, reported an epidemic outbreak of tegumentary leishmaniasis during 2003. The mean age of the 31 cases was 25.0 ± 13.7 years old, with a sex ratio male:female 1.8, and without mucosal involvement. They clustered in two contiguous neighbourhoods, 96% in the periurban border and 4% in the peripheral outskirts. The transmission peak was estimated to have occurred during April 2003. Four species (3608 sand flies) were captured in nine sites: Lutzomyia neivai (90.1%), Lu. pessoai (8.9%), Lu. migonei (0.8 %), and Brumptomyia avellari (0.2 %). The outskirts/rural capture ratio of Lu. neivai was up to 3, and the outskirts/periurban up to 200. Therefore, the 'urban' transmission in this southernmost known focus is still an ecotone-border associated risk. The changes in human distribution or activities, patches of the secondary vegetation, periurban streams, rainfall of the previous year, and river period floods could all contribute to 'urban' outbreaks in the region. Tegumentary leishmaniasis risk should be assessed for any project that involves changes in land use throughout an endemic area.
ISSN:1678-8060
0074-0276
0074-0276
1678-8060
DOI:10.1590/S0074-02762006000700010