The present paper reports the incidence from 1965 to 1979 of acute hemolytic anemia for a total of 948 cases in G-6-PD-deficient subjects due to the ingestion of fresh or dried fava beans or certain drugs and to viral infections. The highest percentage of hemolytic crises was due to fresh fava beans (94.4%). No cases of favism were observed in breast-fed babies whose mothers had eaten fava beans or from pollen inhalation. The male sex proved to be the hardest hit. Hemoglobin values were lower than or equal to 7 g/dl in about 75% of males and 50% of females. Total bilirubin values were lower than 103 μmol/l (6 mg/dl) in about 75% of males and 85% of females. Both the hemoglobin and bilirubin values were statistically significant. Mean transaminase values (SGPT) were significantly higher than those of normal controls. No correlation between favism and blood groups was found.

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