Concentration of salivary A, B and H blood group substances in relation to meals

400 volunteers were chosen for this test [200 females and 200 males]. Their ages ranged from 18 to 22 years old, they were chosen free from diseases [those not taking meals were neglected]. Blood grouping was done for all of them using simple slide method. In female volunteers the following percentages, 29%, 25%, 11% and 35%, were recorded for A, B, AB and O blood groups. In males the percentages of the same blood groups were 31%, 24%, 10%, and 35%, respectively. Secretors status using screening test was done for all of them [males and females]. The results indicated that 77.5% of females and 80% of males were secretors. Quantitative determination of A, B and H substances was done after 1, 2, 3 and 4 hours from intake of the last meal [breakfast]. The results showed that the best time for A, B and H secretions was after lapse of 2-3 hours from meal intake