Para

___________ is the only protozoan parasite found in the lumen of the human small intestine.

Four weeks after his arrival from Africa, a 24-year-old graduate student presents with blood in his urine. Microscopic examination of his urine reveals the presence of eggs with terminal spines. In the interview he admits that he has been working on his family's rice field occasionally since his early childhood. The most likely etiologic agent of his complaint is A_ Fasciolopsis buski B_ Schistosoma mansoni C_Schistosoma haematobium D_ Schistosoma japonicum E_ Entamoeba histolytica

A 4-year-old boy presents to his pediatrician with intense perianal itching. His mother explains that the child has also been extremely irritable during the day and has not been sleeping well at night. Eggs with a flattened side were identified by the laboratory technician from a piece of scotch tape brought in by the parent. Infection with which of the following organisms is most likely? A_ Entamoeba histolytica B_ Echinococcus granulosus C_Ascaris lumbricoides D_ Trichuris trichiura E_ Enterobius vermicularis