RESUMO
Invasive amebiasis is a very serious health problem in Mexico as it is presumably related to the presence of virulent strains of Entamoeba histolytica and poor hygienic and sanitary conditions; other factors related to invasive amebiasis are undernutrition, alcoholism, and homosexuality. We present three patients with pulmonary amebic hematogenous abscess. Clinically all patients had the typical "chocolate" exudate. The three patients had pulmonary consolidations by chest roentgenogram; one of them had multiple opacities with air fluid level, and the others had an isolated opacity with air fluid level. The ultrasound and hepatogammagram were negative for diaphragmatic communication in all; in one of them the pneumoperitoneum was negative for diaphragmatic communication. The transthoracic needle biopsy of the lesions was positive to ameba in two patients. The serologic tests were positive in all. We treated the patients with metronidazole and emetine during 10 days; since the clinical picture and the radiologic findings did not remit completely, we gave a second course of metronidazole during 10 days more and achieved complete resolution.