A child has foul-smelling, greasy stools and weight loss. Wet mount reveals trophozoites with “falling leaf” motility. What is the parasite?

A 36-year-old HIV+ patient presents with chronic diarrhea. Modified acid-fast stain reveals 4–6 μm round oocysts. Which is the most likely agent?

A woman with AIDS presents with watery diarrhea. Stool shows oocysts measuring ~8–10 μm. Which parasite is suspected?

A farmer accidentally ingests oocysts from cat feces. He later develops cervical lymphadenopathy resembling mononucleosis. Which parasite is responsible?

A young boy develops meningoencephalitis after swimming in a warm pond. Brain biopsy reveals trophozoites. Which parasite caused this?

A woman complains of frothy vaginal discharge and itching. Wet mount shows trophozoites with jerky motility. What parasite is implicated?

A fisherman presents with fever, chills, and anemia. Blood smear shows multiple ring forms inside RBCs, some with appliqué appearance. Which parasite is suspected?

A patient with malaria is found to have banana-shaped gametocytes in a thick smear. Which species is this diagnostic of?

A 45-year-old farmer presents with fever and splenomegaly. Blood smear shows band forms across RBCs. What is the parasite?

A child has rectal prolapse and watery stools. Barrel-shaped eggs with bipolar plugs are found. Which parasite is responsible?

A stool exam reveals unembryonated eggs with a mammillated coat. The patient recalls passing long worms. Which parasite is most likely?

A barefoot farmer develops iron-deficiency anemia. Stool shows thin-shelled ova. Which parasite is most likely?

A stool exam reveals rhabditiform larvae with short buccal cavity and large genital primordium. Which parasite is this?

A fisherman develops hemoptysis. Eggs with operculum are found in sputum. What parasite is responsible?

A child with perianal itching undergoes Scotch tape test. The lab reports embryonated eggs flattened on one side. What parasite is implicated?

A farmer in Leyte presents with hepatosplenomegaly. Stool exam shows eggs with a small lateral knob. Which parasite is implicated?

A fisherman presents with hematuria. Urine exam shows eggs with terminal spines. Which parasite is responsible?

A man ate undercooked wild boar and later developed muscle pain. Biopsy shows encysted larvae. Which parasite is implicated?

A child develops diarrhea and malabsorption after eating raw fish. Megaloblastic anemia is later detected. What parasite is the cause?

A patient who ate raw beef passed motile proglottids in stool. Which parasite is most likely?

A patient developed seizures after ingesting eggs from contaminated food. CT shows cysts in brain. Which parasite is implicated?

A shepherd has a liver mass. Imaging shows hydatid cysts with daughter cysts. Which parasite is implicated?

A child developed autoinfection with a cestode causing hyperinfection. Stool exam shows eggs with polar filaments. Which parasite is responsible?

A child accidentally ingested dog fleas. Stool exam reveals egg packets. Which parasite is implicated?

A patient from Africa presents with river blindness. Skin snips reveal microfilariae. Which parasite is implicated?

A man presents with elephantiasis. Night blood smear shows sheathed microfilariae with nuclei not extending to tail tip. Which parasite is implicated?

A man bitten by deerflies develops Calabar swellings. Blood smear shows sheathed microfilariae with nuclei extending to tail tip. Which parasite is implicated?

A patient with malabsorption develops chronic diarrhea. Stool shows tiny unembryonated eggs resembling peanut-shaped ova. Which parasite is suspected?

A fisherman from Bicol has hepatomegaly. Stool exam reveals large operculated eggs, indistinguishable from Fasciolopsis buski. What feature differentiates them?

A 19-year-old student developed fever and hepatosplenomegaly after bathing in an irrigation canal. Stool exam reveals eggs with a lateral spine. Which parasite is most likely?

A fisherman developed hematuria and bladder wall calcifications. Ova with terminal spine are found in urine. Which parasite is implicated?

A patient reports eating raw water plants. Later, he develops right upper quadrant pain. Eggs resembling Fasciola hepatica are found in stool. How can you distinguish them from Fasciolopsis buski?