Persistence of phlebotomine Leishmania vectors in urban sites of Catania Sicily, ItalyReportar como inadecuado




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Parasites and Vectors

, 7:560

First Online: 09 December 2014Received: 06 July 2014Accepted: 23 November 2014

Abstract

BackgroundPioneering research on -Mediterranean Kala-Azar- carried out by Adler and Theodor early in the past century ~1930s had identified Catania city Sicily as a major focus of the disease nowadays known as zoonotic visceral leishmaniasis VL. Despite the fact that disease in both humans and dogs has continued to be highly prevalent in the Catania province up to the present times, research on Leishmania vectors in this urban focus dates back to that distant period. This study aimed to evaluate the persistence and current composition of the sand fly fauna in urban environments of Catania in recent years, 2006 and 2013.

MethodsIn 2006 fifty-one suitable collecting sites were identified within 44 sub-units of a grid drawn to include the urban Catania area. In 2013 the survey was restricted to four of the most productive and representative sites resulting from the 2006 survey. In both periods 3 collections per month were performed using standard sticky traps set for 3 days in wall holes-cavities along public roads, from the end of April through December.

Results43-51 sites 84.3% were found positive for sand flies. The 2006 collections accounted for a total of 4341 specimens including six species. Among competent Leishmania vector species, P. perniciosus was the most prevalent 36.5% being identified in all sand fly-positive sites, with significant abundance in those of the old city centre. Other species of interest were P. sergenti 2.5% and P. neglectus 1.5%. The 2013 survey produced 1130 sand flies, of which 39.5% were P. perniciosus, 1.6% P. sergenti and 0.7% P. neglectus. A search for Leishmania DNA in a small sample of 72 P. perniciosus females revealed 11% infection prevalence.

ConclusionsOur findings from an old urban focus of leishmaniasis demonstrate that phlebotomine sand flies have adapted fairly well to the drastic environmental changes that have occurred in cities of the Western world in the past century and still represent a potential risk for Leishmania transmission.

KeywordsCatania Italy Canine leishmaniasis Sand fly vectors Phlebotomus perniciosus Urban sand flies Phlebotomus Perniciosus Leishmania Sicily Electronic supplementary materialThe online version of this article doi:10.1186-s13071-014-0560-0 contains supplementary material, which is available to authorized users.

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Autor: Oscar Lisi - Vera D’Urso - Valerio Vaccalluzzo - Gioia Bongiorno - Cristina Khoury - Francesco Severini - Trentina Di Muc

Fuente: https://link.springer.com/







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