LAB QUIZ 4 (HELMINTHS)

Question 1

means “parasitic worms”

Answer 1

helminths

Question 2

nematodes -
cestodes -
trematodes -

Answer 2

1. roundworms
2. tapeworms
3. flukes

Question 3

have multiple proglottids, two brothria (grooves) with 2 intermediate host: crustaceans and fish

Answer 3

pseudophyllideans

Question 4

posess cup like suckers called “acetabula”

Answer 4

cyclophyllideans

Question 5

treatment for cestodes
- except for echinococcus for which albenzole is the drug of choice

Answer 5

PRAZIQUANTEL

Question 6

“broad fish tapeworm”
- longest of the tapeworms
- eggs are oval ellipsoidal; an operculum at one end, and at the opposite is a small knob (ABOPERCULAR KNOB)

Answer 6

diphyllobothrium latum

Question 7

called “pork tapeworm”
- four suckers, circle of hooks around a rostellum
- 5-10 primary uterine branches

Answer 7

taenia solium

Question 8

called “beef tapeworm”
- four suckers, no hooks, no rostellum
-15-25 primary uterine branches
- cattle

Answer 8

taenia saginata

Question 9

called “asian tapeworm”
- no hooks but with rostellum
- 11-32 primary uterine branches
- cows,goat,wild boar,monkey

Answer 9

taenia asiatica

Question 10

called “dwarf tapeworm”
- most frequently found tapeworm in developed countries
- ingestion of cysticercoid larvae from infected rice or flour beatle
- these eggs are round or slightly oval, size 70-85x60-80 um, with a straight outer membrane

Answer 10

hymenolepsis nana

Question 11

called “rat tapeworm”
- accidental parasite
- ingestion of RAT FLEA CYSTICERCOID LARVAE
- these eggs are oval and smaller than those of h. diminuta, with a range size of 30-50 um, inner membrane are two poles, which 4-8 polar filaments spread out between the two membranes

Answer 11

hymenolepsis diminuta

Question 12

• most common tapeworm of dogs or cats
• transmission: dog or cat flea carrying cysticerci
• BARREL-SHAPED PROGLOTTIDS IN STOOL

Answer 12

dipylidium caninum

Question 13

• scolex with four sucker and circle of hooks; ONLY THREE PROGLOTTIDS(one of the smallest tapeworms)
• transmit in ingestion of egg in food contaminated with dog feces
• UNICOLUCULAR HYDATID (Liver,lungs,brain)
• treatment: albendazpole, surgical resurrection)

Answer 13

echinococcus granulosus

Question 14

• definitive host: foxes
• interm host: rodents
• transmit: accidental ingestion of fox feces
• MULTILOCULATED CYST (alveolar cyst, “honeycomb vesicles”)

Answer 14

echinococcus multilocularis

Question 15

• flattened, leaf shaped, except schistosoma which are cylindrical
• are unsegment unlike cestodes with many proglottids

Answer 15

trematodes

Question 16

small, LATERAL SPINE (knob)

Answer 16

schistosoma japonicum

Question 17

large, LATERAL SPINE (prominent)

Answer 17

schistosoma mansoni

Question 18

large, TERMINAL SPINE

Answer 18

schistosoma haematobium

Question 19

• known as “japanese lung fluke”
• transmission: ingestion or raw crabmeat/crayfish
• intermediate host; snail antemelania asperata and mountain crab sundathelphusa phillipina
• disease; pragonimiasis
• operculated/unembryonated egg in sputum or feces

Answer 19

paragonimus westermani

Question 20

• chinese liber fluke/oriental liver fluke
• intermediate host; snail and fish
• trans: ingestion of undercooked fish
• disease clonorchiasis

Answer 20

clonorchis sinensis

Question 21

‘temperate liver fluke’
• Sheep-liver fluke; ingestion of watercress (or other
aquatic plants)
• Halzoun – painful pharyngitis
• Symptoms: due to the presence of adult worms in
the biliary tract (RUQ pain, fever, but mostly asymptomatic)

Answer 21

fasciola hepatica

Question 22

• called “tropical liver fluke”
• adult worms and eggs are larger than F hepatica.
• in the ph, snail host are (LYMNAEA PHILIPPINENSIS AND LYMNAEA AURICULARIA RUBIGINOSA)

Answer 22

fasciola gigantica

Question 23

• Giant intestinal fluke
• Intestinal parasite of pigs and humans
• Transmission: ingestion of encysted metacercariae
from aquatic plants
• Intermediate host: small planorbid snails in the genera
Hippeutis and Segmentin

Answer 23

fasciolopsis buski

Question 24

• ingestion of raw fish containing cysts
• mimics peptic ulcer disease

Answer 24

heterophyes heterophyes

Question 25

• Incidence is highest in areas where undercooked or raw freshwater snails,
clams, fish, or amphibians are eaten.
• Disease manifestation
• Catarrhal inflammation often occurs due to the penetration of the sharp-spined collar into
the intestinal mucosa, which creates ulcerative lesions.

Answer 25

Echinostoma spp.