Publications

report of balanorchis anastrophus in pará state with surface topography by scanning electron microscopy.	balanorchis anastrophus fischoeder, 1901, from the reticulum of bos taurus is reported for the first time in the state of pará, brazil. the surface topography as revealed by scanning electron microscopy is presented.	1992	1343797
[the evolution over time of the in-vitro resistance of plasmodium falciparum to antimalarial drugs in 2 areas of the brazilian amazonia with distinct socioeconomic and geographic characteristics].	we evaluated the temporal progression of in vitro p. falciparum resistance to chloroquine, amodiaquine, quinine and mefloquine in two areas with distinct socioeconomical and geographical characteristics: lourenço, in amapá state and paragominas, in pará state. the former region is essentially an "open" gold mining camp, whereas the latter is one currently undergoing a colonization settlement process, in addition to expanding economical activities which mainly include cattle raising and wood expl ...	1995	8668836
[study of q fever in s ao paulo. i. incidence in dairy cattle in the para'ibo valley].		1964	14187809
molecular epidemiology of rabies from maranhão and surrounding states in the northeastern region of brazil.	although many outbreaks of rabies have been reported in northern brazil, few epidemiological studies of these outbreaks have been undertaken. in this study, molecular epidemiological analyses were performed using 41 rabies virus samples isolated in the maranhão (ma), pará (pa), and tocantins (to) states of northeastern brazil. a 599-bp region of the glycoprotein (g) gene was first amplified from each sample by rt-pcr, then sequenced and subjected to phylogenetic analysis. a phylogenetic tree div ...	2006	16773238
the development of an enzyme-linked immunosorbent assay for trypanosoma vivax antibodies and its use in epidemiological surveys.	there are data indicating that the distribution of trypanosoma vivax in the brazilian territory is expanding with potential to reach other areas, where the vectors are present. the detection of anti-trypanosomal antibodies in serum provides important information of the trypanosomal status in cattle herds. for this reason, an enzyme-linked immunosorbent assay (tv-elisa-ab) with crude antigen from one brazilian isolate of t. vivax was developed and evaluated. the sensitivity and specificity were r ...	2006	17160291
prevalence of neospora caninum antibodies in cattle from santarém, pará, brazil.	prevalence of anti-neospora caninum antibodies was measured in serum samples randomly collected from dairy (40 cows from four farms) and beef cattle (120 animals from 12 farms) from the municipality of santarém, pará state, brazil, calculated by using the win episcope 2.0 statistical program. the presence of anti-n. caninum antibodies was determined by indirect immunofluorescence-antibody test with a cut-off value of 1:100. we found that 13 farms (81.25%) showed infection rates above 10%, which ...	2008	17619028
neriidae (diptera: schizophora) of the brazilian amazon: new records of genera and species, and key to species.	the present study brings together survey data from collection in several localities in the brazilian amazon and specimens from the entomological collection of museu paraense emílio goeldi (mpeg-belém). the flies were collected over organic decomposing matter (bananas and bovine meat) baits. the genus odontoloxozus enderlein, with the species odontoloxozus peruanus hennig, is recorded from brazil for the first time. the species glyphidops (glyphidops) flavipes (widemann), g. (oncopsia) flavifrons ...	2008	18368250
frequency of antibodies to babesia bigemina, b. bovis, anaplasma marginale, trypanosoma vivax and borrelia burgdorferi in cattle from the northeastern region of the state of pará, brazil.	babesiosis, anaplasmosis, and trypanosomosis are relevant diseases, potentially causing morbidity in cattle, leading to economic losses. borreliosis is import as a potential zoonosis. the objective of this study was to determine, by indirect enzyme-linked immunosorbent assay (elisa), the frequency of seropositive cattle to babesia bigemina, b. bovis, anaplasma marginale, trypanosoma vivax and borrelia burgdorferi in cattle from the northeastern region of pará, brazil. sera samples from 246 femal ...	2008	18823579
elevated blood lead levels in a riverside population in the brazilian amazon.	lead (pb) is recognized as one of the most toxic metals. sources of pb exposure have been widely documented in north america, and the removal of pb additives from gasoline was reflected in a dramatic lowering of blood pb concentration. in latin america, the removal of pb from gasoline resulted in decreased exposure, but pb levels in many areas remain high due to occupational and environmental sources of exposure. while many of the pb sources have been identified (mining, industries, battery recy ...	2009	19389665
[parasitic dynamics of gastrointestinal nematode infection in the periparturient period of beef cattle in the state of para].	the experiment was conducted to investigate the dynamics of infection by gastrointestinal nematodes during the periparturition period in cows. one hundred and six beef cows were divided into two groups: g1 was formed by 42 cows of one and two parturitions, and g2 by 76 cows of three or more parturitions. from the 120 days pre partum until the 90 days post partum, feces were collected for faecal egg counts (epg) while blood was collected to determine the packed cell volume and hemoglobin levels o ...	2009	20040209