Cryptosporidium is a microscopic and apicomplexan parasite.C. parvum is an obligate intracellular parasite, that infects both humans and livestock transmitted via highly durable oocysts in feces.Development inculde both a cyclic asexual reproduction and the production of gametes giving rise to further oocysts, which are either excreted or reinfect the host.C. Parvum oocysts-forming apicomplexan protozoa, which complete their life cycle both in humans and animals, through zoonotic and anthroponotic transmission, causing cryptosporidiosis. Cryptosporidium paravum is most commonly known for waterborne transmissionmore but recently identified as an emerging food contaminant. Several documented food-associated outbreaks have been reported in improperly pasteurized milk , chicken salad in , uncooked green onions.