Abstract
Blood, urine and stool samples of 770 students of 5 different schools of Karachi were collected during January to December 2013 for observing the effects of malaria, hook worm and round worm on prevalence of hemoglobin concentration and anaemic condition. Out of 770 and 661 children were found infected with species of helminthes and plasmodium, 532 children were found anaemic. The children who were not infected with any parasites also to be showed anaemic (Table 3), while the children co-infected with plasmodium falciparum and helminthes showed anaemia with lowest Hb levels, i.e. 119-125g/L (Table 2 & 4).