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Journal of Clinical Microbiology, Oct 1996, 2368-2371, Vol 34, No. 10
Copyright © 1996 by the American Society for Microbiology. All rights reserved.

Urine sample used for congenital toxoplasmosis diagnosis by PCR

I Fuentes, M Rodriguez, CJ Domingo, F del Castillo, T Juncosa and J Alvar
Servicio de Parasitologia, Instituto de Salud Carlos III, Madrid, Spain.

The diagnosis of toxoplasmosis in congenitally infected infants can be difficult; serology is unreliable, and diagnosis must be based on the combination of symptomatology and direct demonstration of the parasite. Four infants suspected of having Toxoplasma gondii infection were studied by serological analysis, tissue culture, and PCR determination. T. gondii was isolated from the urine of one patient. The parasite was detected by PCR in the blood and cerebrospinal fluid of three infants and in the urine in all patients. Because nested PCR proved to be a sensitive, relatively rapid, and specific method and because it can be applied to a variety of different clinical samples, PCR can be a valuable technique for the identification of T. gondii infections in children. The present study indicates that PCR examination of urine, a fluid never before used for diagnosis in this age group, may be valuable in diagnosing cases of congenital toxoplasmosis.


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