Aim of the study is to detect Cryptosporidium, a newly emerging parasite in malnourished children with and without diarrhea, using conventional methods and special staining techniques. A total of 727 children comprised of 497 malnourished and 230 normal children having with and without diarrhoea. Two consecutive samples were collected from each individual and one preserved using 10% formalin. Examination of helminthes and protozoan in the stool samples were done by direct wet mount method and by formalin ether sedimentation method. | Detection of cryptosporidium species among malnourished children in and around Chennai, Tamil Nadu, southern India