| nocturnal activity patterns of lutzomyia longipalpis (diptera: psychodidae) at an endemic focus of visceral leishmaniasis in colombia. | nocturnal activity of the sand fly lutzomyia longipalpis (lutz & neiva) was studied from august 1991 to july 1992 in a small rural community in colombia where american visceral leishmaniasis is endemic. during 2 or 3 nights each month, sand flies were collected with hand-held aspirators each hour between 1730 and 0630 hours, from a pigpen and a cattle corral located 30 m apart. host-seeking activity of l. longipalpis adults was characterized by 2 general patterns: (1) adult sand fly activity inc ... | 1995 | 7473615 |
| age structure, blood-feeding behavior, and leishmania chagasi infection in lutzomyia longipalpis (diptera: psychodidae) at an endemic focus of visceral leishmaniasis in colombia. | ecological studies on the sand fly lutzomyia longipalpis (lutz & neiva) were conducted during 1990-1992 in a small rural community in colombia where american visceral leishmaniasis (avl) is endemic. subsamples of sand flies collected weekly from pigpens, the interior of houses, and natural outdoor resting sites were dissected to determine physiological age and leishmania chagasi cunha & chagas infection rates. eleven female l. longipalpis had flagellates in their gut, 2 of which were successfull ... | 1995 | 7473616 |
| species composition and relative abundance of sand flies of the genus lutzomyia (diptera: psychodidae) at an endemic focus of visceral leishmaniasis in colombia. | ecological studies on the sand fly lutzomyia longipalpis (lutz & neiva) were conducted during 1990-1993 at a small rural community in colombia where american visceral leishmaniasis is endemic. weekly sand fly collections were made from pigpens, houses, and natural resting sites, using hand-held aspirators, sticky (oiled) paper traps, and opossum-baited disney traps. in total, 263,094 sand flies were collected; l. longipalpis predominated (86.1%), followed by l. trinidadensis (11.0%), l. cayennen ... | 1995 | 7650716 |
| seasonal abundance of lutzomyia longipalpis (diptera: psychodidae) at an endemic focus of visceral leishmaniasis in colombia. | ecological studies on the sand fly lutzomyia longipalpis (lutz & neiva) were conducted during 1990-1993 in a small rural community in colombia where american visceral leishmaniasis is endemic. standardized weekly sand fly collections made from pigpens and natural resting sites displayed a bimodal annual abundance cycle, with a small peak occurring in october-november and a larger one in april-may. time series analysis was employed to quantify the associations between sand fly abundance and weath ... | 1995 | 7650717 |
| dispersal of the sand fly lutzomyia longipalpis (diptera: psychodidae) at an endemic focus of visceral leishmaniasis in colombia. | mark-release-recapture studies were carried out during 1990-1991 in el callejón, colombia, an endemic focus of american visceral leishmaniasis, to study the longevity, dispersal, and flight range of the principal vector, lutzomyia longipalpis lutz & neiva. several groups of wild-caught (n = 1,539) and laboratory-reared f1 (n = 2,208) sand flies were marked with fluorescent dusts and released. recaptures at daytime resting sites, on animal bait, and in cdc light traps were made for 20 d following ... | 1993 | 8459421 |
| larval microhabitats of lutzomyia longipalpis (diptera: psychodidae) in an endemic focus of visceral leishmaniasis in colombia. | an intensive search for the larval habitats of lutzomyia longipalpis (lutz & neiva) was conducted from november 1992 to october 1993 at a small rural community in colombia where american visceral leishmaniasis is endemic. emergence traps constructed from polyvinyl chloride pipes were used to sample a variety of soil microhabitats that included edge areas of covered pigpens, cattle corrals, the base of trees, and leaf litter at sites within 40 m of a house, rocks in fields located between 50 and ... | 1997 | 9439128 |
| genetic structure of local populations of lutzomyia longipalpis (diptera: psychodidae) in central colombia. | lutzomyia longipalpis (lutz & neiva), the sand fly vector of american visceral leishmaniasis in the new world tropics, has a broad but discontinuous geographical distribution from southern mexico to argentina. a baseline for population genetic structure and genetic variability for this species was obtained by analyzing 5 local, peridomestic populations at the approximate center of its distribution, the magdalena river valley of central colombia. three populations of l. longipalpis from el callej ... | 1998 | 9542350 |
| genetic variation among natural and laboratory colony populations of lutzomyia longipalpis (lutz & neiva, 1912)(diptera: psychodidae) from colombia. | genetic diversity among three field populations of lutzomyia longipalpis in colombia was studied using isozyme analysis. study sites were as much as 598 km apart and included populations separated by the eastern cordillera of the andes. genetic variability among populations, estimated by heterozygosity, was within values typical for insects in general (8.1%). heterozygosity for field populations were compared with a laboratory colony from colombia (melgar colony) and were only slightly lower. th ... | 1998 | 9698845 |
| canine visceral leishmaniasis: dog infectivity to sand flies from non-endemic areas. | canine visceral leishmaniasis (vl), caused by leishmania infantum (leishmania chagasi in the new world), is a zoonotic, endemic disease in western europe and latin america. the potential spreading to new regions was suggested by the appearance of canine vl among foxhounds in the us. although the sand fly vectors in the major foci of transmission have been described, no information exists on other sand flies that could propagate the infection outside endemic areas. we evaluated the capacity of lu ... | 2002 | 12002643 |
| impact of habitat degradation on phlebotominae (diptera: psychodidae) of tropical dry forests in northern colombia. | we examined changes in the phlebotomine fauna resulting from human intervention in a tropical dry forest of northern colombia where visceral and cutaneous leishmaniases are endemic. a natural forest reserve (colosó) and a highly degraded area (san andrés de sotavento [sas]) were sampled monthly for 8 mo using shannon traps, sticky traps, and resting-site collections. overall abundances were higher in colosó (15,988) than in sas (2,324). and species richness of phlebotomines was greater in the fo ... | 2002 | 12061439 |
| [lutzomyia longipalpis (diptera: psychodidae) at a suburban focus of visceral leishmaniasis in the chicamocha canyon, santander, colombia]. | between 1998 and 2000, the occurrence of 8 cases of american visceral leishmaniasis in children from a recently established human settlement in guatiguará, in the municipality of piedecuesta (santander, colombia) indicated the possible presence of leishmania transmission in this locality. this observation motivated the current entomological investigation. | 2006 | 17361847 |
| [seroprevalence of canine visceral leishmaniasis in sector 8 of neiva and in four municipalities of huila, colombia]. | canine visceral leishmaniasis in endemic areas of colombia could be a public health risk factor given the zoonotic nature of the disease. ninety-six human cases of visceral leishmaniasis were reported in colombia in 2004, 5 of them in huila, where lutzomyia longipalpis has been incriminated as the main vector species. | 2006 | 17361848 |