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

2002, Number 4

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Rev Biomed 2002; 13 (4)

Enterobius vermicularis infection in preschool children from Ciudad Bolívar, Venezuela

Requena-Certad I, Lizardi V, Mejía LM, Castillo H, Devera R

Language: Spanish
References: 53
Page: 231-240
PDF size: 42.43 Kb.


ABSTRACT

Introduction. The nematode Enterobius vermicularis has a characteristic life cycle in which the eggs are found in the stools in only 1 to 5% of the cases of infection. For this reason a special technique is required for its diagnosis: the Graham or adhesive tape method.
Objective. To determine the prevalence of enterobiasis in a pre-school children sample from the urban area of Ciudad Bolívar, Venezuela.
Materials and methods. Between November 1999 and August 2000 a cross-sectional survey was performed on 195 children of both sexes aged 2-7, attending 5 public primary schools in the urban area of Ciudad Bolívar. The children were evaluated clinically and coproparasitologically by means of the Graham method.
Results. A prevalence of 25.6% of E. vermicularis was determined. No differences in relation to age (Yates corrected χ2 = 0.17; f.g. = 2) or sex (p ›0.05) were observed between the parasitized children. Eighty two percent of the infected children was symptomatic. Pruritus ani was the most frequent finding (68%), followed by hyporexia (40%), restlessness (34%), teeth grinding (30%) and vaginal discharge (20%).
Conclusions. A high prevalence of enterobiasis was observed in pre-school children from Ciudad Bolívar. In most of the cases the characteristic clinical manifestations could be determined. Due to the particularities of this nematode´s life cycle, the routine stool exam is not effective for its diagnosis. For this reason, if E. vermicularis infection is suspected at clinical examination, the physician ought to ask for the Graham method for the diagnosis.


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