ABO blood groups in malaria and schistosomiasis haematobium.

We sought to determine if there was any relationship between ABO blood groups and susceptibility to malaria and urinary schistosomiasis. In Epe and outlying villages in south-western Nigeria, we examined 681 people for their blood groups, malaria parasitemia and for the presence of Schistosoma haematobium eggs in their urine specimens. Two hundred and sixty-nine individuals were parasitemic for falciparum malaria, 97 subjects had urinary schistosomiasis and 56 people carried concurrent infections of both parasites. Frequencies of the blood groups were 56.68% for group 0, 22.32% for group B, 18.5% for group A and 2.50% for the AB group. The rates of infection with malaria and/or schistosomiasis showed no significant association with the frequencies of the ABO blood groups.