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identification and biological characterization of leishmania (viannia) guyanensis isolated from a patient with tegumentary leishmaniasis in goiás, a nonendemic area for this species in brazil.the aim of this study was to characterize clinical field isolates of leishmania spp. obtained from patients with american tegumentary leishmaniasis (atl) who live in goiás state, brazil. the presumed areas of infection were in goiás, tocantins, and pará states. three isolates of parasites were identified as l. (viannia) braziliensis and one as l. (v.) guyanensis. the in vitro growth profiles were found to be similar for all parasites. nevertheless, in c57bl/6 mice, l. (v.) guyanensis infection w ...201526583102
phenotypic characterization of leishmania spp. causing cutaneous leishmaniasis in the lower amazon region, western pará state, brazil, reveals a putative hybrid parasite, leishmania (viannia) guyanensis × leishmania (viannia) shawi shawi.we phenotypically characterized 43 leishmanial parasites from cutaneous leishmaniasis by isoenzyme electrophoresis and the indirect immunofluorescence antibody test (23 mcabs). identifications revealed 11 (25.6%) strains of leishmania (v.) braziliensis, 4 (9.3%) of l. (v.) shawi shawi, 7 (16.3%) of l. (v.) shawi santarensis, 6 (13.9%) of l. (v.) guyanensis and l. (v.) lainsoni, 2 (4.7%) of l. (l.) amazonensis, and 7 (16.3%) of a putative hybrid parasite, l. (v.) guyanensis/l. (v.) shawi shawi. m ...201425083790
natural leishmania (viannia) infections of phlebotomines (diptera: psychodidae) indicate classical and alternative transmission cycles of american cutaneous leishmaniasis in the guiana shield, brazil.from 1996 to 1999 multi-trapping methods (center of diseases control, cdc) light traps, light-baited shannon traps, and aspiration on tree bases) were used to study the phlebotomine fauna of the "serra do navio" region of the brazilian state of amapá, which is part of the guiana shield. fifty-three species were identified among 8,685 captured individuals. the following species, associated with the transmission of american cutaneous leishmaniasis in amazonian brazil, were captured: nyssomyia umbr ...201728508745
mucosal leishmaniasis caused by leishmania (viannia) braziliensis and leishmania (viannia) guyanensis in the brazilian amazon.leishmania (viannia) braziliensis is a parasite recognized as the most important etiologic agent of mucosal leishmaniasis (ml) in the new world. in amazonia, seven different species of leishmania, etiologic agents of human cutaneous leishmaniasis, have been described. isolated cases of ml have been described for several different species of leishmania: l. (v.) panamensis, l. (v.) guyanensis and l. (l.) amazonensis.201121408116
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