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 Tropjournal_title
Acta tropicaauthors
Montoya-Lerma J,Cadena H,Oviedo M,Ready PD,Barazarte R,Travi BL,Lane RPdoi
10.1016/s0001-706x(02)00189-4subject
Has Abstractpub_date
2003-01-01 00:00:00pages
19-29issue
1eissn
0001-706Xissn
1873-6254pii
S0001706X02001894journal_volume
85pub_type
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