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, 14 (6), 605-10

Risk Factors for Toxoplasma Infection in a Reproductive Age Female Population in the Area of Belgrade, Yugoslavia

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Risk Factors for Toxoplasma Infection in a Reproductive Age Female Population in the Area of Belgrade, Yugoslavia

B Bobić et al. Eur J Epidemiol.

Abstract

The contribution to Toxoplasma infection of known transmission risk factors such as consumption of undercooked meat, contact with soil, and contact with cats, as well as that of age, degree of education, residence in central vs. suburban city communities, and year of entry into the study, has been investigated in a group of 1157 female residents (age range 15 to 45 years) of a defined geographic area (Belgrade) during a 4-years period (1988-1991). The rate of infection increased with age, ranging from 57% to 93%, with an overall mean of 77%. However, it decreased significantly over the study period (p < 0.01). Of the potential risk factors examined, regression analysis showed that the following: age (relative risk (RR): 1.18, 95% confidence interval (CI): 1.02-1.37, p = 0.022), undercooked meat consumption (RR: 2.22, 95% CI: 1.2-2.86, p = 0.001), and the year of entry into the study (RR: 0.69, 95% CI: 0.6-0.8, p = 0.000) were significantly associated with infection. However, while the consumption of undercooked meat contributed to the frequency of infection in the whole group, its significance increased with the degree of education but decreased with age, and was greater in women residing in the suburbs. In addition, in women below age 20, exposure to soil (farming, gardening) was significantly associated with infection (RR: 1.38, 95% CI: 1.12-1.97, p = 0.037). Since cats are the single source of toxoplasma oocysts, the above finding indicates that cats are an epidemiologically significant source of environmental contamination in Belgrade. However, cat ownership itself as a criterion of contact with cats was not associated with infection (p = 0.326). In the absence of a general screening in pregnancy program in Yugoslavia, these data point out the groups of pregnant women at the highest risk of infection and provide a basis for a region-appropriate educational program to prevent congenital toxoplasmosis.

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