| host preferences of the phlebotomine sandfly lutzomyia longipalpis in amazonian brazil. | experiments were undertaken to determine the relative attractiveness of humans, dogs and chickens to lutzomyia longipalpis, the principal vector of leishmania chagasi causing american visceral leishmaniasis. field experiments in two villages on marajó island, pará state, brazil, showed that one boy attracted significantly more flies than one dog or chicken, and slightly fewer flies than a group of six chickens. experiments with laboratory-bred female flies showed that a significantly greater num ... | 1992 | 1421498 |
| correlates of the peridomestic abundance of lutzomyia longipalpis (diptera: psychodidae) in amazonian brazil. | abundance of the sandfly lutzomyia longipalpis, the vector of leishmania chagasi, was surveyed using cdc light-suction traps in fifteen villages and 180 homesteads on marajó island, pará state, brazil. flies were most abundant in cultivated areas, secondary growth and open woodland, away from savanna grassland and forest. within homesteads, the abundance of flies in animal sheds was weakly associated with the number of hosts kept therein, and inversely related to the number elsewhere, both human ... | 1994 | 7949312 |
| a longitudinal study on the transmission dynamics of human leishmania (leishmania) infantum chagasi infection in amazonian brazil, with special reference to its prevalence and incidence. | this was a longitudinal study carried out during a period over 2 years with a cohort of 946 individuals of both sexes, aged 1 year and older, from an endemic area of american visceral leishmaniasis (avl) in pará state, brazil. the object was to analyze the transmission dynamics of human leishmania (leishmania) infantum chagasi infection based principally on the prevalence and incidence. for diagnosis of the infection, the indirect fluorescent antibody test (ifat) and leishmanin skin test (lst) w ... | 2009 | 18936975 |
| occurrence of antibodies anti-neospora caninum, anti-toxoplasma gondii, and anti-leishmania chagasi in serum of dogs from pará state, amazon, brazil. | a cross-sectional study was conducted to determine the occurrence of anti-toxoplasma gondii, anti-neospora caninum, and anti- leishmania chagasi antibodies in dogs of the state of pará, brazil. for this purpose, 129 blood samples were collected from dogs of different ages and gender. samples of 72 dogs were collected from 39 rural properties from 19 municipalities, and 57 samples were from stray dogs, collected after captivity by the center of zoonosis control from the municipality of santarém. ... | 2010 | 20445991 |
| leishmaniasis in brazil: xviii. further evidence incriminating the fox cerdocyon thous (l) as a reservoir of amazonian visceral leishmaniasis. | major endemic areas of visceral leishmaniasis in brazil are located in the drier, poorly forested regions, principally in the northeastern states such as ceará and bahia. cases of the human disease in the amazon region are rare, very sporadic, and seldom present opportunities for epidemiological study. following the report of a fatal case near salvaterra, the island of marajó, pará state, a preliminary investigation has resulted in the isolation of a parasite regarded as leishmania donovani chag ... | 1982 | 7164150 |
| leishmaniasis in brazil. xix: visceral leishmaniasis in the amazon region, and the presence of lutzomyia longipalpis on the island of marajó, pará state. | sporadic cases of visceral leishmaniasis in amazonian brazil appear limited to pará state, in the lower amazon valley and principally near the atlantic coast. the fox cerdocyon thous (l.) has been incriminated as a natural host of the causative parasite, leishmania donovani chagasi, but past doubts have existed over the identification of the most likely vector as lutzomyia (lutzomyia) longipalpis (lutz & neiva, 1912). investigations on two of five recent cases of visceral leishmaniasis of man in ... | 1983 | 6623589 |
| leishmaniasis in brazil. xxi. visceral leishmaniasis in the amazon region and further observations on the role of lutzomyia longipalpis (lutz & neiva, 1912) as the vector. | further evidence is presented incriminating the sandfly lutzomyia longipalpis as the vector of leishmania chagasi, the causative agent of american visceral leishmaniasis, in the amazon region of brazil. during an outbreak of the disease in santarém, pará state, this insect was shown to be the only species of sandfly consistently present in and around the patient's homes, where it often occurred in very large numbers. of 491 specimens dissected, 35 (7.14%) proved to be infected, and isolates of l ... | 1985 | 4002291 |
| leishmaniasis in brazil. xxii: characterization of leishmania from man, dogs and the sandfly lutzomyia longipalpis (lutz & neiva, 1912) isolated during an outbreak of visceral leishmaniasis in santarém, pará state. | during epidemiological studies on an outbreak of visceral leishmaniasis in santarém, pará state, north brazil, isolates of leishmania from two children, three dogs and six naturally infected specimens of the sandfly lutzomyia longipalpis were compared, biochemically, by starch-gel enzyme electrophoresis. they have proved to be indistinguishable from each other, and from a reference strain of leishmania chagasi cunha & chagas, 1937 from a case of human visceral leishmaniasis from bahia state, nor ... | 1986 | 3726975 |
| leishmania (viannia) naiffi sp. n., a parasite of the armadillo, dasypus novemcinctus (l.) in amazonian brazil. | a new leishmanial parasite, leishmania (viannia) naiffi sp. n., is described from the nine-banded armadillo, dasypus novemcinctus (edentata: dasypodidae), from para state, north brazil. the parasite grows luxuriantly in diffco blood-agar medium (b47), but poorly in the skin of intradermally inoculated hamsters. a comparison of isoenzyme profiles by starch gel electrophoresis separates the parasite from l. (v) braziliensis and l. (v.) guyanensis by the enzymes asat, alat, pgm, gpi, g6pd, pep, mpi ... | 1989 | 2930120 |