helminths

Question 1

cestodes

Answer 1

tapeworms

Question 2

trematodes

Answer 2

flukes

Question 3

nematodes

Answer 3

roundworms

Question 4

tapeworms

Answer 4

cestodes–Taenia solium

Question 5

flukes

Answer 5

trematodes–Schistosoma species

Question 6

roundworms

Answer 6

nematodes–Ascaris lumbricoides, Enterobus vermicularis, Trichinella spirales

Question 7

Taenia solium

Answer 7

cestode/tapeworm–pork; intestine is primary site of infection (diarrhea); most infections are asymptomatic; ingested larvae in undercooked pork

Question 8

Schistosoma species

Answer 8

trematodes/flukes–different forms of disease; can infect GI tract (GI bleeding, diarrhea, liver damage) or veins of urinary bladder (fibrosis, granulomas, hematuria)–egyptian river blindness

Question 9

Ascaris lumbricoides

Answer 9

nematodes/roundworms–“roundworm disease” second only to pinworms as most prevalent multicellular parasite in US (1/3 of worlds population is infected); ingestion of soil containing eggs; larvae grow in intestine and cause abdominal symptoms including intestinal obstruction

Question 10

Enterobus vermicularis

Answer 10

nematodes/roundworms–“pinworm disease” most common helminthic infection in US; pruritis ani occurs with white worms visible in stools

Question 11

Trichinella spiralis

Answer 11

nematode/roundworm–“trichinosis” encysts tissues of human and pork hosts