first venezuelan record of lutzomyia umbratilis ward & fraiha, 1977 (diptera: psychodidae), a proven vector of leishmania braziliensis guyanensis. 19853832500
a pilot study to control lutzomyia umbratilis (diptera:psychodidae), the major vector of leishmania braziliensis guyanensis, in a peri-urban rainforest of manaus, amazonas state, the second half of 1980, 112 (or ca. 16%) of the inhabitants of the new settlement of são josé, city of manaus, contracted cutaneous leishmaniasis whilst clearing their properties of terra firme rainforest. with the aid of sucam, the authors carried out a pilot study to investigate the feasibility of reducing populations of lutzomyia umbratilis, the local silvatic vector of leishmania braziliensis guyanensis, by spraying insecticide on its favoured diurnal resting sites, the bases of the larg ...19854088044
american cutaneous leishmaniasis in guyana, south america.the 185 patients who presented at the dermatology clinic of georgetown public hospital, guyana, between 1992 and 1998, with skin ulcers indicative of american cutaneous leishmaniasis (acl) were retrospectively reviewed. the laboratory-confirmed cases of acl were identified and the corresponding data were analysed for risk factors such as age, gender, areas of residence and of possible exposure to the causative agent (leishmania braziliensis guyanensis), ethnic origin, longevity of the ulcers, an ...200111339884
the opossum, didelphis marsupialis (marsupialia: didelphidae), as a reservoir host of leishmania braziliensis guyanensis in the amazon basin of brazil.a total of 52 opossums (six species) were examined for evidence of infection with leishmania in three different areas of forest near manaus, amazonas state, brazil. no infections were detected in 27 opossums from a region of relatively undisturbed forest, including specimens of didelphis marsupialis (18); metachirus nudicaudatus (four); monodelphis brevicaudata (one); marmosa cinerea (two); m. murina (one) and m. parvidens (one). of 15 d. marsupialis captured from a biological reserve, much dist ...19817324129
leishmaniasis in brazil: xvi. isolation and identification of leishmania species from sandflies, wild mammals and man in north para state, with particular reference to l. braziliensis guyanensis causative agent of "pian-bois".a total of 125 wild mammals (14 different species) were examined for evidence of infection with leishmania in an area of primary forest highly endemic for "pian-bois", due to leishmania braziliensis guyanensis, in north pará state, brazil. parasites isolated were characterized biologically, and biochemically on enzymic profiles. l. b. guyanensis was isolated from the viscera of one lesser anteater (tamandua tetradactyla) and one opossum (didelphis marsupialis), and the skin of one rodent (proech ...19817324128
epidemiology of leishmaniasis in french guiana.lutzomyia umbratilis is confirmed as the vector of leishmania braziliensis guyanensis, the cause of "pian bois" in man in french guiana. although spending most of the year in the forest canopy, this sandfly is abundant at ground level for about two weeks at the beginning of the long rainy season. the maximum number of infective bites per man per hour (3.9) was reached at the end of november 1979. infections were found in one of seven potos flavus, seven of 15 choleopus didactylus and two of 19 r ...19827080142
hosts of sandfly vectors of leishmania braziliensis guyanensis in the central amazon of brazil.the blood meals of 2,569 phlebotomine sandflies from areas endemic for cutaneous leishmaniasis in the central amazon of brazil were tested by the microcapillary precipitin method to determine their vertebrate hosts. the two-toed sloth, choloepus didactylus, was the predominant host of two incriminated vectors of leishmania braziliensis guyanensis in the region, lutzomyia umbratilis and lu. anduzei (64.0% and 63.6%, respectively). the lu. "shannoni" group, a complex of several species in which fe ...19827072886
flagellate infections of brazilian sand flies (diptera: psychodidae): isolation in vitro and biochemical identification of endotrypanum and leishmania.flagellate infections were found in 1,063 of 18,895 sand flies collected in the states of amazonas, pará, rondonia and acre, brazil. infection rates were 13.4% (species group shannoni); 7.5% (subgenus nyssomyia); 6.7% (subgenus lutzomyia series cruciata); 0.5% (genus psychodopygus) and 3.1% for other sand flies (various subgenera). leishmania braziliensis guyanensis and l. mexicana amazonensis were isolated, respectively, from the known vectors, lutzomyia umbratilis and l. flaviscutellata. singl ...19853938924
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