| highly endemic, waterborne toxoplasmosis in north rio de janeiro state, brazil. | in campos dos goytacazes, northern rio de janeiro state, brazil, reports of uveitis consistent with toxoplasmosis led to a survey of the prevalence and risk factors for toxoplasma gondii infection in 1997-1999. the survey population was selected randomly from schools, randomly chosen communities, and an army battalion. serum samples from 1,436 persons were tested. with results adjusted for age, 84% of the population in the lower socioeconomic group was seropositive, compared with 62% and 23% of ... | 2003 | 12533282 |
| prevalence of toxoplasma gondii in chickens from an area in southern brazil highly endemic to humans. | the prevalence of toxoplasma gondii in free-range chickens from campos dos goytacazes, rio de janeiro state, brazil, was examined to evaluate environmental contamination by oocysts. antibodies against t. gondii were assayed by the modified agglutination test (mat) in sera of chickens. antibodies against the parasite were found in 129 of 198 chickens with mat titers > or = 1:25. brains and hearts of 86 of the 198 chickens were bioassayed in mice for the presence of t. gondii. viable parasites wer ... | 2003 | 12760664 |
| toxoplasma gondii isolates of free-ranging chickens from rio de janeiro, brazil: mouse mortality, genotype, and oocyst shedding by cats. | most isolates of toxoplasma gondii can be grouped into 3 genetic lineages. in the present study, 67 isolates of t. gondii were obtained by bioassay in mice inoculated with brains and hearts of 96 asymptomatic chickens from an area highly endemic to human infection in rio de janeiro, brazil. of the 48 isolates genotyped using the sag2 locus, 34 (70%) were of type i and 13 (27%) were of type iii. no isolate of type ii was recovered. isolates from 1 chicken contained a type i and type iii mixed inf ... | 2003 | 14533703 |
| [prevalence of anti-toxoplasma gondii antibodies in dairy cattle from sul fluminense paraíba valley, state of rio de janeiro]. | a survey of toxoplasmosis in cattle from sul fluminense paraiba valley micro region in the state of rio de janeiro was realized, where serum samples were collected from 589 animals of 29 dairy farms located at municipalities of resende and rio claro. serology was performed by using indirect immune fluorescent test (ifat), and considering as positive to toxoplasma gondii titles > or = 64. results found in both municipalities were 14.8% serum reagents animals. when these results were analyzed by e ... | 2005 | 16229757 |
| [toxoplasma gondii in brains of pigs commercialized at the municipality of campos dos goytacazes in the state of rio de janeiro, brazil]. | brain samples of 12 pigs commercialized for food consumption at the municipality of campos dos goytacazes in the state of rio de janeiro were examined for the presence of toxoplasma gondii. brain sample of each pig was grinded and submitted to peptic digestion. one ml of the homogenate of each sample was inoculated in three albino mice, and this procedure was repeated 24 hours later. inoculated mice were observed during six weeks. dead mice or those that presented clinical signs suggestive of th ... | 2006 | 16647000 |
| follow-up of the health conditions of an urban colony of free-roaming cats (felis catus linnaeus, 1758) in the city of rio de janeiro, brazil. | similar to other urban areas where food and shelter are abundant, the zoological garden of rio de janeiro has dealt for years with a colony of feral or semi-feral domestic cats. a survey was conducted during 2002-2004 as a follow-up to a previous study in 2001 of the cat colony to identify pathogens circulating among the population and to annually follow the status of the cats to analyze morbidity coefficients and associations among infections and infestations identified in the colony. during th ... | 2007 | 17481822 |
| genetic diversity of toxoplasma gondii isolates from chickens from brazil. | until recently, toxoplasma gondii was considered clonal with very little genetic variability. recent studies indicate that t. gondii isolates from brazil are genetically and biologically different from t. gondii isolates from usa and europe. in the present study, we retyped 151 free range chicken isolates from brazil including 117 newly isolated samples from 11 geographically areas (alagoas, bahia, ceará, maranhão, paraná, pernambuco, rio de janeiro, rio grande do norte, são paulo, sergipe, and ... | 2008 | 18804329 |
| association of the presence of residual anti-toxoplasma gondii igm in pregnant women and their respective family groups in miracema, northwest rio de janeiro, brazil. | the seroprevalence of toxoplasmosis in 832 pregnant women in miracema, rio de janeiro, was determined and 75.1% (625) and 2.0% (17) were anti-toxoplasma gondii igg and igm positive, respectively. out of the 17 igm positive pregnant women, only one had low avidity igg corresponding to the acute phase of the infection. all the other women presented with high avidity igg and also presented with residual igm anti-t. gondii. of this sample, 106 received home visits (this includes 11 family nuclei of ... | 2008 | 18949330 |
| [frequency of lesions suggestive of ocular toxoplasmosis among a rural population in the state of rio de janeiro]. | to determine the prevalence of ocular toxoplasmosis among the general population of the district of santa rita de cassia, barra mansa, state of rio de janeiro, a cross-sectional study on 1,071 individuals was performed. these subjects underwent serological tests (anti-toxoplasma igg and igm) and physical and ophthalmological examinations. the diagnosis of presumed ocular toxoplasmosis was based on clinical and serological criteria and the appearance of the retinochoroidal lesion. the lesions wer ... | 2009 | 19448935 |
| multi-locus dna sequencing of toxoplasma gondii isolated from brazilian pigs identifies genetically divergent strains. | five toxoplasma gondii isolates (tgpgbr1-5) were isolated from hearts and brains of pigs freshly purchased at the market of campos dos goytacazes, northern rio de janeiro state, brazil. four of the five isolates were highly pathogenic in mice. four genotypes were identified. multi-locus pcr-dna sequencing showed that each strain possessed a unique combination of archetypal and novel alleles not previously described in south america. the data suggest that different strains circulate in pigs desti ... | 2010 | 21051148 |
| anti-toxoplasma gondii antibodies in cattle and pigs in a highly endemic area for human toxoplasmosis in brazil. | sera from 77 cattle and 61 pigs from herds of campos dos goytacazes and neighborhood, north of rio de janeiro state, brazil, were analyzed for the presence of antibodies anti-toxoplasma gondii via elisa. the seropositivity was confirmed at 49.4% (38 of 77) for cattle and at 11.5% (7 of 61) for pigs. pigs bred under free-ranging systems presented with 20.6% (7 of 34) seropositivity and no pigs bred under indoor systems were positive (n = 27). the seropositivity verified for cattle and pigs conf ... | 2010 | 21348605 |
| trends in aids-defining opportunistic illnesses incidence over 25 years in rio de janeiro, brazil. | to assess the temporal trends in incidence of aids-defining opportunistic illnesses in an urban cohort of a middle-income country. | 2014 | 24901419 |
| characterization of the zoonotic potential of toxoplasma gondii in horses from rio de janeiro state. | the aim of this study was to perform a survey on the prevalence of anti-toxoplasma gondii antibodies in horses from rio de janeiro state, brazil. from 2012 to 2013, a total of 624 blood samples were collected from horses from the eight regions comprising rio de janeiro state (baixadas litorâneas, serrana, norte fluminense, noroeste fluminense, centro-sul, metropolitana, médio paraíba, and costa verde). all sera samples were tested for anti-t. gondii antibodies by performing the modified agglutin ... | 2017 | 28377222 |
| toxoplasma gondii survey in cats from two environments of the city of rio de janeiro, brazil by modified agglutination test on sera and filter-paper. | toxoplasma gondii is a protozoan with a worldwide distribution, in warm-blood animals, including humans. local conditions and environmental disturbances may influence transmission dynamics of a zoonotic agent. this study evaluates the epidemiology of t. gondii based on toxoplasmosis prevalence in two populations of cats living in distinct urbanization conditions in rio de janeiro, brazil. | 2017 | 28212681 |
| mapping of the environmental contamination of toxoplasma gondii by georeferencing isolates from chickens in an endemic area in southeast rio de janeiro state, brazil. | the environmental contamination of toxoplasma gondii in an endemic area in brazil was mapped by georeferencing isolates from chickens in farms in the southeast of the state of rio de janeiro. tissue samples obtained from 153 adult chickens were analyzed by the mouse bioassay for t. gondii infection. these animals were reared free-range on 51 farms in the municipalities of rio bonito and maricá. the arcgis kernel density estimator based on the frequency of t. gondii-positive chickens was used to ... | 2015 | 26054514 |
| toxoplasmosis-related knowledge among pregnant and postpartum women attended in public health units in niterói, rio de janeiro, brazil. | the present study conducted a toxoplasmosis-related knowledge level survey with 400 pregnant and puerperal women attended in public health units in the municipality of niterói, rio de janeiro. only 111 (27.8%) women claimed to know about the disease. most of them (n = 289; 72.2%) had never heard about toxoplasmosis nor knew how to prevent the infection by toxoplasma gondii. a significant difference (p = 0.013) regarding the presence of anti-t. gondii igg was observed between women who claimed to ... | 2015 | 25229225 |
| occurrence and risk factors associated to toxoplasma gondii infection in sheep from rio de janeiro, brazil. | toxoplasmosis is an important cause of abortion in sheep and a zoonotic risk to humans, leading to significant hazards to health and to economic losses. this study examined the seroprevalence and associated risk factors for infection with toxoplasma gondii in 379 sheep from 12 flocks in rio de janeiro state, brazil. using the modified agglutination test (mat), 202 (53.3 %) of 379 were seropositive with titers of 1:25 in 65, 1:50 in 40, 1:100 in 23, 1:200 in 11, 1:400 in 36, 1:800 in 7, 1:1,600 i ... | 2014 | 25172114 |
| seroprevalence of toxoplasma gondii (nicole & manceaux, 1909) and retroviral status of client-owned pet cats (felis catus, linnaeus, 1758) in rio de janeiro, brazil. | cats, as definitive host, play an important role in the transmission of toxoplasma gondii. this study aimed to establish the seroprevalence of anti-t. gondii immunoglobulins g and m, and determine the frequency of oocysts in the feces of the domestic cat population in rio de janeiro, brazil. we also aimed to study the association between t. gondii infection and age, sex, breed, lifestyle, diet and retroviral infection. a total of 108 cats were included in the study and fecal samples of 54 of tho ... | 2015 | 24878997 |
| detection of toxoplasma gondii in two southern wooly spider monkeys (brachyteles arachnoides-geoffroy, 1806) from the rio de janeiro primate center, brazil. | toxoplasmosis led to the death of two brachyteles arachnoides, an endangered atelid. | 2014 | 24757733 |
| prevalence and risk factors for toxoplasma gondii infection among pregnant and postpartum women attended at public healthcare facilities in the city of niterói, state of rio de janeiro, brazil. | to determine the prevalence of immunoglobulin g (igg) and immunoglobulin m (igm) anti-toxoplasma gondii antibodies among pregnant and postpartum women attended within the public healthcare system in niterói, state of rio de janeiro,and to detect possible exposure factors associated with t. gondii infection in this population. | 2013 | 23559345 |