Good, B., Holland, C., Taylor, M.R.H., Larragy, J., Moriarty, P. and O'Regan, M., Ocular toxocariasis in school children, Clinical Infectious Disease, 39, 2004, 173 - 178
Clinical Infectious Disease; 39;
Ocular toxocariasis in humans is typically a unilateral disease caused by second‐stage larvae of the Toxocara species. Serological evidence of widespread infection in humans provides little information on clinical disease. There is only a single previous estimate of the prevalence of ocular toxocariasis (from Alabama). The present survey examined the extent of consultant‐diagnosed toxocaral eye disease among a population of schoolchildren. More than 120,000 participants were surveyed by questionnaire and follow‐up. Two sets of control subjects from the same school and from the same county were compared with persons who had ocular toxocariasis. The prevalence of consultant‐diagnosed toxocaral eye disease was 6.6 cases per 100,000 persons when only cases regarded as definite by the consultant ophthalmologist were included. This increased to 9.7 cases per 100,000 persons when both definite and strongly suspected cases were included. Geophagia and a history of convulsion were associated with toxocaral eye disease in both of the case‐control studies.
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