Humans are infected by hookworms, whipworms and roundworms when they ingest eggs on contaminated food and by bilharzias when their skin is penetrated By Standard Digital | Sep. 7, 2011 Share this article on social . Latest Stories . Recommended Articles Court rules Kenyans can change gender markers on official documents Crime and Justice By Kamau Muthoni 34 mins ago Vitality Health International rebrands to strengthen healthcare in Kenya, Africa Health & Science By Linda Akwabi 15 mins ago Centum Re begins handover of 400 apartments at Nairobi's Two Rivers Real Estate By Brian Ngugi 51 mins ago