ABSTRACT
The aim of this study was to estimate the serum prevalence of Toxoplasma infection in two groups ofuniversity students: Veterinary Medicine (VM) and Other Courses (OC). Students from two public universities in the state of Rio de Janeiro were investigated to identify risk habits and behaviors for Toxoplasma gondii infection, and to guide primary prevention. All 839 students answered aquestionnaire about habits and behaviors (347 OC and 492 VM). A serum prevalence of 21.8 percent was observed by indirect immunofluorescence (IFA) and ELISA. No statistically significant difference was observed between students of the universities. Serum prevalence (IFA and ELISA IgG) was16.1 percent in VM and 29.9 percent in OC. Six students were IgM seropositive, of which five were onlypositive in ELISA and one was positive with both diagnostic techniques (ELISA and IFA). Amongthose students, four were in the control group from UFF and one in each group from UFRRJ. The prevalence of students seropositive for toxoplasmosis was low in both universities and the resultsobtained suggest that veterinary students are probably not exposed to a higher risk than the generalpopulation for acquiring toxoplasmosis. Age, contact with cats, consumption of undercooked orraw meat, contact with campus soil and ignorance of prophylactic measures for toxoplasmosis werepositively associated with prevalence of infection by T. gondii.
O objetivo deste estudo foi estimar a soroprevalência da infecção toxoplásmica em dois grupos de universitários, de Medicina Veterinária (MV) e de Outros Cursos (OC), de duas instituições públicas de ensino do Estado do Rio de Janeiro, buscando identificar hábitos e comportamentos de risco para infecção por este protozoário, e orientando sobre a prevenção primária. Dos 839 universitários, 492 eram da MV e 347 de OC. Todos os acadêmicos responderam a um questionário sobre seus hábitos e costumes. A soroprevalência (RIFI e ELISA IgG) foi de 16,1 por cento na MV e 29,9 por cento nos OC. Seis estudantes foram IgM soro reagentes, dos quais cinco eram apenas positivos no ELISA e um era positivo em ambas as técnicas de diagnóstico (ELISA e RIFI). Entre os estudantes, quatro eram do grupo de controle da UFF e um em cada grupo da UFRRJ. A prevalência de universitários soros reagentes para a toxoplasmose nas duas Universidades foi baixa e os resultados obtidos neste estudo sugerem que provavelmente os estudantes de Medicina Veterinária não estão expostos a um risco maior que os de outros cursos de adquirir a toxoplasmose. A idade, o contato com gatos, com o solo do campus, o consumo de carne crua ou mal-passada e o desconhecimento sobre a profilaxia da toxoplasmose influenciaram na prevalência da infecção por T. gondii.
Subject(s)
Seroepidemiologic Studies , Toxoplasma , Veterinary MedicineABSTRACT
Introduction 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. Methods IgM and IgG anti-T. gondii antibodies were investigated in 276 pregnant and 124 postpartum women by using the indirect immunofluorescence (IFAT) and immunoenzymatic assay (ELISA) techniques. The participants were selected by convenience sampling. All these 400 patients filled out a free and informed consent statement, answered an epidemiological questionnaire and were informed about the disease. Results Among the 400 samples analyzed, 234 (58.5%) were reactive to IgG anti-T. gondii antibodies, according to the IFAT and/or ELISA assay. One pregnant woman was found to be reactive to IgM anti-T. gondii antibodies, with an intermediate IgG avidity test. Risk factor analysis showed that seropositivity was significantly associated (p<0.05) with age, contact with cats and presence of rodents at home. Through a logistic regression model, these associations were confirmed for age and contact with cats, while education at least of the high school level was found to be a protective factor. Conclusions The prevalence rate of IgG anti-T. gondii antibodies in the City of Niterói was high and the risk factors for infection detected after multivariate analysis were: age over 30 years, contact with cats and education levels lower than university graduate level. .
Subject(s)
Adolescent , Adult , Animals , Cats , Female , Humans , Middle Aged , Pregnancy , Young Adult , Postpartum Period , Pregnancy Complications, Parasitic/epidemiology , Toxoplasma/immunology , Toxoplasmosis/epidemiology , Antibodies, Protozoan/blood , Brazil/epidemiology , Cross-Sectional Studies , Educational Status , Enzyme-Linked Immunosorbent Assay , Fluorescent Antibody Technique, Indirect , Immunoglobulin G/blood , Immunoglobulin M/blood , Prevalence , Pregnancy Complications, Parasitic/diagnosis , Risk Factors , Toxoplasmosis/diagnosisABSTRACT
This study aimed to estimate the occurrence of anti-Toxoplasma gondii antibodies by means of the Indirect Immunufluorescent Antibody Assay (IFAT) in cattle and pigs from slaughterhouses in two municipalities in the State of Rio de Janeiro. IgG anti-T. gondii antibodies was found in 1.96 percent (9/459) of the cattle and 7.64 percent (31/406) of the pigs, without any positive association (p > 0.05) with risk factors for transmission and seropositivity. Taking the cutoff point of IFAT ³ 1:64, titers of 64 and 256 were detected, suggesting chronic infection. Despite the low prevalence rates found for cattle and pigs, these indicated environmental contamination in the municipalities investigated, biosafety failures at the technified pig farm evaluated and the possibility of human and animal infection through eating raw or undercooked meat from these animals.
Este trabalho objetivou estimar a ocorrência de anticorpos anti-Toxoplasma gondii por meio da Reação de Imunofluorescência Indireta (RIFI) em bovinos e suínos de abatedouros de dois municípios do Estado do Rio de Janeiro. Anticorpos IgG anti-T. gondii foram encontrados em 1,96 por cento (9/459) dos bovinos e em 7,64 por cento (31/406) dos suínos, sem associação positiva (p > 0,05) em relação aos fatores de risco de transmissão e a soropositividade. Considerando-se o ponto de corte (RIFI ³ 1:64), foram detectados os títulos de 64 e 256, sugestivos de infecção crônica. Apesar de baixas, as prevalências encontradas para bovinos e suínos indicaram contaminação ambiental nos municípios avaliados, falhas na biossegurança da granja tecnificada de suínos e a possibilidade de infecção humana e animal pela ingestão da carne crua ou mal passada desses animais.
Subject(s)
Animals , Female , Male , Antibodies, Protozoan/blood , Cattle/blood , Swine/blood , Toxoplasma/immunology , AbattoirsABSTRACT
This report aimed to assess the seroprevalence of Toxoplasma gondii infection in 708 swine matrices in Nova Mutum and Diamantino in the state of Mato Grosso, Central-West Brazil. Serum samples were examined by indirect fluorescent antibody test (IFAT). It was found a seroprevalence of 12.8 percent, considering titers >64. Therefore, the data reinforce the need for appropriate management of swine raising to minimize the risk of infection of pigs with T. gondii.
No presente trabalho, objetivou-se avaliar a soroprevalência da infecção por Toxoplasma gondii, em 708 matrizes suínas dos municípios de Nova Mutum e Diamantino do Estado de Mato Grosso, Brasil. As amostras de soro foram examinadas por meio da reação de imunofluorescência indireta (RIFI). Foi encontrada a frequência de 12,8 por cento de soros positivos, com diluições iguais ou superiores a 64. Portanto, os dados obtidos reforçam a necessidade de um manejo de criação adequado, visando à minimização do risco de infecção de suínos por T. gondii.