Plants used in Guatemala for the treatment of gastrointestinal disorders. 3. Confirmation of activity against enterobacteria of 16 plants.

Ethnobotanical surveys and literature review identified 408 plants used in Guatemala for the treatment of gastrointestinal disorders. The screening of 84 showed that 34 inhibit one or more enterobacteria; 16 of these were selected for further investigation. Extracts were obtained with three solvents of different polarity (n-hexane, acetone and alcohol) and the in vitro activity was demonstrated against enteropathogenic Escherichia coli, Salmonella enteritidis and Shigella flexneri.

[Lymphoepithelioma of the pharynx in children].

Through a period of thirteen years, eleven patients with pharyngeal lymphoepithelioma were treated at the Hospital Nacional de Niños, San José, Costa Rica. This represents 2.5% of all malignant tumors observed in the same period.