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2000, Number 3

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Rev Mex Patol Clin Med Lab 2000; 47 (3)

The immunoepidemiology of trichinellosis in children in Mexico City

Martínez-Barbabosa I, Gutiérrez QM, Romero-Cabello R, Fernández PAM, Vázquez TO, Pérez LMJ, Gutiérrez CEM

Language: Spanish
References: 33
Page: 156-161
PDF size: 96.92 Kb.


ABSTRACT

Trichinellosis is a zoonotic disease originating in food, caused by the nematode Trichinella spiralis. Its frequency of occurrence in Mexico is unknown despite the number of outbreaks of the disease which have taken place. Hence, the aim of the study was to measure the prevalence of antibodies specific to the antigens of Trichinella spiralis by means of indirect haemagglutination (IHA). A sample group of Mexico City schoolchildren was chosen and their serum analyzed. 2ll blood samples were taken from children between 6 and 12 years old. 111 (52.6 %) were boys and 110 (47.4 %) were girls. These were divided into 6 groups, one for each school grade. The immunological analysis of the serum was carried out using the indirect haemagglutination microtechnique (HAI). Seven (3.3 %) of the 211 serum samples analyzed by HAI turned out to be positive. Dilution titles of 1:32 were considered to be positive. Five samples had been taken from 10 year old pupils who were in the 5th grade (4 boys, 1 girl); the other two samples were from girls in the 4th grade. No difference in reaction was observed between boys and girls. The 3.3 % of seropositive results present in the study is an indicator that trichinellosis is being transmitted within the population studied. The possible causes of this transmission are analyzed.


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