[Necator americanus uncinariasis in an infant born and residing in Mexico City].

A six-month-old infant is reported with the unquestionable diagnosis diagnosis of Necator americanus uncinariasis. The mother was also infected with the same hookworm. The patient was born and has always dwelt in Mexico City, where helminthiasis is considered extremely rare. The epidemiologic studies determined that the dwelling conditions were inadequate for the transmittal of the agent through the soil. The authors emphasize the importance of the presumptive diagnosis in those cases suggesting the disease and to carry out studies to confirm the existence of other infectious means