Comparative vectorial efficiency of Lutzomyia evansi and Lu. longipalpis for transmitting Leishmania chagasi.

Abstract:

:The infection rates and development of Leishmania chagasi in two sandfly species, Lutzomyia evansi and Lutzomyia longipalpis, were evaluated under natural and experimental conditions. Natural infection rates of Lu. evansi in San Andrés de Sotavento (Colombia) and Montañas de Peraza (Venezuela) (0.05 and 0.2%, respectively) were similar to those previously recorded for this species in Colombia and Venezuela and for Lu. longipalpis in many foci of American Visceral Leishmaniasis (AVL). Both sand fly species were able to support the development of two Colombian strains of L. chagasi experimentally acquired from dogs, hamsters or membrane feeders. However, the experimental infection rates and the sequence of parasite development in the guts of these sand flies revealed that parasite colonisation, differentiation, migration and attachment were more frequent and uniform in Lu. longipalpis than in Lu. evansi. This is consistent with a more recent association between L. chagasi and Lu. evansi, and these results might help to explain the irregularity of AVL outbreaks in foci where Lu. evansi has been reported as the sole vector.

journal_name

Acta Trop

journal_title

Acta tropica

authors

Montoya-Lerma J,Cadena H,Oviedo M,Ready PD,Barazarte R,Travi BL,Lane RP

doi

10.1016/s0001-706x(02)00189-4

subject

Has Abstract

pub_date

2003-01-01 00:00:00

pages

19-29

issue

1

eissn

0001-706X

issn

1873-6254

pii

S0001706X02001894

journal_volume

85

pub_type

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