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Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán

2006, Number 4

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Rev Biomed 2006; 17 (4)

Seroepidemiology of fascioliasis in school children in Mexico City

Martínez-Barbabosa I, Gutiérrez-Quiroz M, Romero-Cabello R, Ruiz-González L, Gutiérrez-Cárdenas EM, Alpizar-Sosa A, Pimienta-Lastra RJ

Language: English
References: 19
Page: 251-257
PDF size: 64.42 Kb.


ABSTRACT

The aim of this investigation was to determine the prevalence of Fasciola hepatica by the indirect haemaglutination test (IHAT) and by coprological and epidemiological analyses of samples from asymptomatic children in Mexico City. A blood sample and three feces samples were collected from 331 children between 6 and 13 years old. The immunological analysis was effected by IHAT using raw extract of the adult worm Fasciola hepatica antigen. Fecal material was analysed using a simple sedimentation series of three. Six epidemiological variables were analysed.
Results. Five sera were positive; seroprevalence was 1.5%. The coprological study was negative to F. hepatica. No statistical relationship between seropositivity and consumption of vegetables (χ2=0.42, p=0.84) was found. However, a statistically significant relationship (p=0.002) between parasites and age was found. This finding coincides with the age of the seropositives. No association between seropositivity and housing, drinking water and drainage, water supply, or consumption of raw vegetables (χ2=6.0, p=0.11) was found; the association with the place of origin of parents was also negative (χ2=1.85, p=0.17).
Conclusions. Although Mexico City is not an endemic zone and the proper conditions for fascioliasis development are not present, it is important to recognize that the existence of residents from multiple origins represents risks for this, as we were able to show. Specifically, school age is the identified risk factor


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