| further evidence for the transmission of mansonella ozzardi by simulium amazonicum in brazil. | the transmission of mansonella ozzardi was studied in two rubber collecting villages on the river purus, state of amazonas, brazil. haematophagous insects were collected from human and bovine baits during the day and night: 687 mansonia amazonensis and 154 culicoides sp. indet. were free from infection with m. ozzardi. the former species is probably not a vector, but the low numbers of culicoides dissected preclude any determination of its vector status. thirty-five (0-99%) of 3530 simulium amaz ... | 1976 | 7215 |
| [mansonella ozzardi among ticuna indians of the state of amazonas, brazil]. | | 1978 | 150843 |
| epidemiologic studies among amerindian populations of amazonia. ii. prepvalence of mansonella ozzardi. | the prevalence of microfilaremia among indians in 13 amazon indian villages was determined by examining giemsa-stained peripheral blood smears and preparations from peripheral blood lymphocyte cultures. mansonella ozzardi was the only species found in the 601 persons tested. prevalence was highly village-specific, ranging from 0% in four villages to as high as 93% among persons aged 10 years and older in others. comparisons of the two methods showed that the concentration effect of the periphera ... | 1979 | 389074 |
| a preliminary survey of the prevalence of mansonella ozzardi in some rural communities on the river purus, state of amazonas, brazil. | three hundred and eighty-six blood films were taken from mesticos (persons of mixed race) in villages on the river purus, amazonas; 17(4-4%) were infected with mansonella ozzardi. an average of 11-2 microfilariae/20 mm3 of blood (range 1-103) were found in infected persons. no statistical difference was found between the infection rates of males and females. seringueiros (rubber collectors) and lavradores (agricultural workers) showed similar high infection rates, compared to people with indoor ... | 1975 | 1155999 |
| simulium species of the amazonicum group as vectors of mansonella ozzardi in the brazilian amazon. | experimental infection with mansonella ozzardi of common haematophagous diptera collected at a ticuna indian village on the upper reaches of the solimões river in the brazilian amazon, showed that simulium amazonicum and simulium n.sp. are capable of supporting full development of the parasite. natural infections with this filaria were found in both species including infective larvae in simulium n.sp. no development of m. ozzardi occurred in mansonia amazonensis, culicoides insinuatus or lepisel ... | 1980 | 7010699 |
| first report of presumed parasitic keratitis in indians from the brazilian amazon. | to describe corneal disorders in patients with systemic parasitic disease. | 2000 | 11095056 |
| [ocular manifestations in mansonelliasis]. | to evaluate eye manifestations in mansonelliasis patients from coari, am, rural area on the middle amazonas river. | 2008 | 18516413 |
| current profile of mansonella ozzardi (nematoda: onchocercidae) in communities along the ituxi river, lábrea municipality, amazonas, brazil. | the objective of this paper was to describe the current status of mansonella ozzardi prevalence among the inhabitants of 12 communities along the ituxi river, in lábrea municipality, state of amazonas. the prevalence of m. ozzardi was determined using thick blood smears obtained by digital punctures. m. ozzardi was found in 30.23% of the samples collected (39/129), with similar prevalence between genders (males: 30.30%; females: 30.16%); the highest prevalence was found in homemakers (45.45%) fo ... | 2008 | 18660999 |
| an atypical microfilaria in blood samples from inhabitants of brazilian amazon. | an unidentified microfilaria sharing characteristics with mansonella ozzardi and onchocerca volvulus was detected in blood samples from seven human volunteers, inhabitants of a community in the border of amazonas and acre state. they were detected during epidemiological studies carried out in some communities along antimary, acre, and purus rivers in the brazilian amazon. the most striking difference was presented in the shape of the cephalic space from this microfilaria which was different from ... | 2008 | 18779979 |
| mansonella ozzardi in brazil: prevalence of infection in riverine communities in the purus region, in the state of amazonas. | this study was undertaken to investigate the prevalence of mansonella ozzardi infection and to estimate the parasitic infection rate (pir) in simuliid black flies in the municipality of pauini, amazonas, brazil. we used thick blood films to examine 921 individuals in 35 riverine communities along the pauini and purus rivers. simuliids were caught in several communities. flies were identified, stained with haematoxylin and dissected. overall, 44 (24.86%) of 177 riverines were infected in communit ... | 2009 | 19274380 |
| [occurrence of mansonella ozzardi (nematoda, onchocercidae) in riverine communities of the purus river, boca do acre municipality, amazonas state, brazil]. | the study aimed to estimate the prevalence of mansonella ozzardi and calculate the parasitic infection rate in simuliid blackflies. the research was conducted in communities on the purus river, boca do acre municipality, amazonas state, brazil. prevalence was measured using the thick smear method. captured blackflies were dissected to verify the parasitic infection rate. m. ozzardi prevalence was 27.30% (77/282). the study showed higher prevalence in men (31.97%) than women (22.22%), farmers (48 ... | 2009 | 19503972 |
| mansonella ozzardi in amazonas, brazil: prevalence and distribution in the municipality of coari, in the middle solimões river. | this study investigated some epidemiological aspects of the mansonella ozzardi in municipality of coari, amazonas. clinical symptoms were correlated with the filarial infection and the parasitic infection rates (pir) were estimated in simuliid vectors. the general m. ozzardi human prevalence rate was 13.3% (231/1733), of which 10.2% (109/1069) were from the urban area and 18.4% (122/664) from the rural area. the prevalence rates were higher in men (14.5% urban and 19.7% rural) than in women (6.7 ... | 2010 | 20512236 |
| nested pcr to detect and distinguish the sympatric filarial species onchocerca volvulus, mansonella ozzardi and mansonella perstans in the amazon region. | we present filaria-nested polymerase chain reaction (pcr), which is based on amplification of first internal transcribed spacer rdna to distinguish three parasitic filarial species (onchocerca volvulus, mansonella ozzardi and mansonella perstans) that can be found in the amazon region. nested pcr-based identifications yielded the same results as those utilizing morphological characters. nested pcr is highly sensitive and specific and it detects low-level infections in both humans and vectors. no ... | 2010 | 20945000 |
| prevalence of mansonella ozzardi among riverine communities in the municipality of lábrea, state of amazonas, brazil. | estimate the prevalence of mansonella ozzardi infection and calculate the parasitic infection rate (pir) in simuliid black flies in the municipality of lábrea, state of amazonas, brazil. | 2011 | 21468472 |
| investigation of the occurrence of mansonella ozzardi in the state of rondônia, western amazonia, brazil. | mansonella ozzardi, a human filarial nematode transmitted by diptera simuliidae flies (black flies), is widely spread in the amazon, while the occurrence of mansonelliasis in the state of rondônia (western amazonia) has not been reported thus far. the existence of this parasitic disease in this state is investigated in this study. | 2011 | 21877064 |
| atypical mansonella ozzardi microfilariae from an endemic area of brazilian amazonia. | mansonellosis is endemic in several regions of africa, the caribbean, and latin america. mansonella ozzardi and mansonella perstans have been reported in latin america, including the amazon region. a morphological and molecular microfilariae study was performed in pauini (brazil). blood samples were collected from 40 individuals, and were analyzed by giemsa-stained blood film and by two different nested polymerase chain reactions which detect internal transcribed spacer-1 and the major sperm pro ... | 2016 | 27402517 |
| occurrence of mansonella ozzardi diagnosed using a polycarbonate membrane in a riverside population of lábrea in the western brazilian amazon. | introduction mansonella ozzardi is a widely distributed filaria worm in the amazon region. this study aimed to determine the prevalence of m. ozzardi infection in riverine communities of lábrea municipality, amazonas state, brazil. methods a diagnostic blood filtration method in a polycarbonate membrane was used. results m. ozzardi was found in 50.3% of the sample, with the highest prevalence in farmers/fishermen (69.4%; χ 2 = -19.14, p<0.001). the prevalence was higher in longer-term residents ... | 2016 | 27163575 |
| mansonella ozzardi in the municipality of tefé, amazonas, brazil, 60 years after the first report: an epidemiologic study. | the prevalence of mansonelliasis was studied in the municipality of tefé, state of amazonas, brazil. the prevalence (thick blood smear method) was 13.6% (147/1,078), higher in the solimões river region (16.3%) than in the tefé river region (6.3%). in the sampled communities in the solimões river region, a higher density of cases was observed, as indicated by a kernel analysis (odds ratio 0.34; 95% confidence interval: 0.20-0.57). males had a higher prevalence (χ2 = 31.292, p < 0.001) than women. ... | 2014 | 24863971 |
| sustained clearance of mansonella ozzardi infection after treatment with ivermectin in the brazilian amazon. | therapy for mansonelliasis is challenging because there is no standard drug recommended for its treatment. this non-randomized study was conducted to evaluate the effectiveness of a single dose of 0.15 mg/kg of ivermectin to reduce mansonella ozzardi microfilaraemia in infected persons. a total of 74 patients were studied within the municipality of lábrea, which is located in amazonas state, brazil. the patients were treated with ivermectin after detection of the parasite by blood examination. s ... | 2014 | 24710613 |
| mansonella ozzardi (nematoda: onchocercidae) in the riverine population of the tefé river, state of amazonia, brazil. | this study assessed the prevalence of mansonella ozzardi in riverine communities of the tefé river, amazonas, brazil. | 2014 | 24553803 |
| new records of mansonella ozzardi: a parasite that is spreading from the state of amazonas to previously uninfected areas of the state of acre in the purus river region. | mansonella ozzardi infections are common in the riverside communities along the solimões, negro and purus rivers in the state of amazonas (am). however, little is known about the presence of this parasite in communities located in regions bordering am and the state of acre. the prevalence rate of m. ozzardi infections was determined in blood samples from volunteers according to the knott method. a total of 355 volunteers from six riverine communities were enrolled in the study and 65 (18.3%) wer ... | 2014 | 24141966 |