MT 26 (LEC): Nematodes FINALS

What is the common name of Ascaris lumbricoides?
A. Hookworm
B. Pinworm
C. Giant intestinal roundworm
D. Whipworm

C. Giant intestinal roundworm

Which nematode is associated with rectal prolapse?
A. Strongyloides stercoralis
B. Trichuris trichiura
C. Enterobius vermicularis
D. Ancylostoma duodenale

B. Trichuris trichiura

Which nematode has a life cycle involving parthenogenesis?
A. Trichinella spiralis
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Ancylostoma caninum

B. Strongyloides stercoralis

What is the infective stage of hookworms?
A. Rhabditiform larvae
B. Embryonated egg
C. Filariform larvae
D. Proglottid

C. Filariform larvae

Which nematode causes visceral larva migrans?
A. Ascaris lumbricoides
B. Toxocara canis
C. Enterobius vermicularis
D. Trichuris trichiura

B. Toxocara canis

Which nematode’s adult form has trilobate lips?
A. Trichuris trichiura
B. Ascaris lumbricoides
C. Capillaria hepatica
D. Hookworms

B. Ascaris lumbricoides

What is the mode of reproduction in Trichinella spiralis?
A. Oviparous
B. Viviparous
C. Parthenogenetic
D. Larviparous

B. Viviparous

Which nematode egg appears barrel-shaped with bipolar plugs?
A. Hookworm
B. Trichuris trichiura
C. Capillaria philippinensis
D. Strongyloides stercoralis

B. Trichuris trichiura

Which nematode is associated with autoinfection and notched tail larvae?
A. Trichuris trichiura
B. Strongyloides stercoralis
C. Enterobius vermicularis
D. Ancylostoma braziliense

B. Strongyloides stercoralis

What is the diagnostic test of choice for Enterobius vermicularis?
A. Giemsa stain
B. Skin snip
C. Scotch tape swab
D. Blood smear

C. Scotch tape swab

Which nematode is the most common helminth infection globally?
A. Enterobius vermicularis
B. Ascaris lumbricoides
C. Strongyloides stercoralis
D. Ancylostoma duodenale

B. Ascaris lumbricoides

Which nematode is diagnosed by recovery of larvae from duodenal aspirates?
A. Trichuris trichiura
B. Ascaris lumbricoides
C. Strongyloides stercoralis
D. Hookworm

C. Strongyloides stercoralis

What is the infective stage of Trichinella spiralis?
A. Larvae in striated muscle
B. Embryonated egg
C. Free-living adult
D. Rhabditiform larvae

A. Larvae in striated muscle

Which nematode migrates through the lungs before settling in the intestines?
A. Enterobius vermicularis
B. Trichuris trichiura
C. Ascaris lumbricoides
D. Capillaria philippinensis

C. Ascaris lumbricoides

Which nematode causes "ground itch" at the site of skin penetration?
A. Trichuris trichiura
B. Hookworm
C. Strongyloides stercoralis
D. Toxocara canis

B. Hookworm

What is the typical egg appearance of Enterobius vermicularis?
A. Barrel-shaped with polar plugs
B. Oval with thin shell and larva inside
C. Flattened on one side
D. Striated shell

C. Flattened on one side

Which nematode is larviparous?
A. Ascaris lumbricoides
B. Trichinella spiralis
C. Enterobius vermicularis
D. Ancylostoma duodenale

B. Trichinella spiralis

Which nematode can cause intestinal obstruction, especially in children?
A. Hookworm
B. Trichuris trichiura
C. Strongyloides stercoralis
D. Ascaris lumbricoides

D. Ascaris lumbricoides

Which parasite is associated with eosinophilic pneumonitis (Löffler's syndrome)?
A. Toxocara canis
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Trichuris trichiura

C. Ascaris lumbricoides

Which nematode has a whip-like adult form?
A. Enterobius vermicularis
B. Strongyloides stercoralis
C. Trichuris trichiura
D. Ancylostoma duodenale

C. Trichuris trichiura

Which nematode is typically diagnosed using concentration techniques due to light egg shedding?
A. Hookworm
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Enterobius vermicularis

B. Strongyloides stercoralis

What type of larvae is seen in stool during autoinfection by Strongyloides?
A. Filariform
B. Rhabditiform
C. Microfilariae
D. Cysticercoid

A. Filariform

Which nematode’s adult females migrate to perianal skin to lay eggs?
A. Strongyloides stercoralis
B. Trichuris trichiura
C. Enterobius vermicularis
D. Capillaria hepatica

C. Enterobius vermicularis

Which nematode is commonly associated with prolapsed rectum in heavy infection?
A. Capillaria philippinensis
B. Enterobius vermicularis
C. Trichuris trichiura
D. Ascaris lumbricoides

C. Trichuris trichiura

Which nematode uses rats and beetles as part of its life cycle?
A. Hookworm
B. Hymenolepis nana
C. Capillaria philippinensis
D. Trichinella spiralis

C. Capillaria philippinensis

What is the main drug used to treat Ascaris infection?
A. Ivermectin
B. Albendazole
C. Metronidazole
D. Mebendazole

B. Albendazole

Which nematode infection is acquired by eating undercooked pork?
A. Ascaris lumbricoides
B. Capillaria philippinensis
C. Trichinella spiralis
D. Enterobius vermicularis

C. Trichinella spiralis

What nematode can cause chronic diarrhea, malabsorption, and protein loss?
A. Hookworm
B. Capillaria philippinensis
C. Trichuris trichiura
D. Ascaris lumbricoides

B. Capillaria philippinensis

Which nematode shows polar plugs on its eggs?
A. Trichuris trichiura
B. Strongyloides stercoralis
C. Capillaria hepatica
D. Hookworm

A. Trichuris trichiura

What is the infective stage of Ascaris lumbricoides?
A. Unembryonated egg
B. Larvated egg
C. Adult worm
D. Rhabditiform larva

B. Larvated egg

Which nematode has eggs with a striated shell?
A. Hookworm
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Trichuris trichiura

C. Ascaris lumbricoides

Which nematode infection results from ingestion of embryonated eggs?
A. Hookworm
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Trichinella spiralis

C. Ascaris lumbricoides

Which nematode has rhabditiform larvae with a short buccal cavity?
A. Strongyloides stercoralis
B. Hookworm
C. Trichuris trichiura
D. Ascaris lumbricoides

A. Strongyloides stercoralis

Which nematode’s adult worm lives in the small intestine and causes chronic diarrhea?
A. Capillaria philippinensis
B. Trichuris trichiura
C. Ascaris lumbricoides
D. Hookworm

A. Capillaria philippinensis

Which nematode has a filariform larva that penetrates human skin?
A. Ascaris lumbricoides
B. Trichuris trichiura
C. Hookworm
D. Enterobius vermicularis

C. Hookworm

Which nematode causes cutaneous larva migrans in humans?
A. Ancylostoma braziliense
B. Trichinella spiralis
C. Ascaris lumbricoides
D. Strongyloides stercoralis

A. Ancylostoma braziliense

Which nematode is transmitted by ingestion of embryonated eggs on hands or food?
A. Trichinella spiralis
B. Enterobius vermicularis
C. Strongyloides stercoralis
D. Hookworm

B. Enterobius vermicularis

Which nematode can cause anemia due to intestinal blood loss?
A. Ascaris lumbricoides
B. Trichuris trichiura
C. Hookworm
D. Enterobius vermicularis

C. Hookworm

Which nematode causes nurse cell formation in striated muscle?
A. Strongyloides stercoralis
B. Trichinella spiralis
C. Ascaris lumbricoides
D. Ancylostoma duodenale

B. Trichinella spiralis

What larval form of hookworm is found in freshly passed stool?
A. Rhabditiform
B. Filariform
C. Embryonated egg
D. Microfilariae

A. Rhabditiform

Which nematode is associated with the term "egg with mammillated albuminous coat"?
A. Hookworm
B. Ascaris lumbricoides
C. Trichuris trichiura
D. Capillaria philippinensis

B. Ascaris lumbricoides

Which nematode can cause hyperinfection in immunocompromised patients?
A. Hookworm
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Trichuris trichiura

B. Strongyloides stercoralis

Which nematode uses two hosts, including rodents and beetles, to complete its life cycle?
A. Trichinella spiralis
B. Capillaria philippinensis
C. Hookworm
D. Strongyloides stercoralis

B. Capillaria philippinensis

Which nematode causes nocturnal perianal pruritus?
A. Ascaris lumbricoides
B. Trichuris trichiura
C. Strongyloides stercoralis
D. Enterobius vermicularis

D. Enterobius vermicularis

Which nematode's larval stage is seen in muscle biopsy?
A. Strongyloides stercoralis
B. Trichinella spiralis
C. Capillaria philippinensis
D. Hookworm

B. Trichinella spiralis

Which nematode is most likely to cause rectal prolapse in heavy infections?
A. Ascaris lumbricoides
B. Enterobius vermicularis
C. Trichuris trichiura
D. Strongyloides stercoralis

C. Trichuris trichiura

Which nematode infection can result in eosinophilic meningitis?
A. Strongyloides stercoralis
B. Angiostrongylus cantonensis
C. Trichinella spiralis
D. Hookworm

B. Angiostrongylus cantonensis

Which is the infective stage of Capillaria philippinensis?
A. Embryonated egg
B. Larva in fish
C. Unembryonated egg
D. Adult worm

B. Larva in fish

Which nematode is associated with "creeping eruption" in humans?
A. Ancylostoma caninum
B. Ascaris lumbricoides
C. Strongyloides stercoralis
D. Enterobius vermicularis

A. Ancylostoma caninum

Which nematode infection is linked to ingestion of raw or undercooked fish?
A. Trichinella spiralis
B. Capillaria philippinensis
C. Strongyloides stercoralis
D. Hookworm

B. Capillaria philippinensis

Which larval form is diagnostic in stool for Strongyloides stercoralis?
A. Cysticercus
B. Rhabditiform larva
C. Embryonated egg
D. Filariform larva

B. Rhabditiform larva

Which nematode uses transmammary transmission in animals, rarely in humans?
A. Ancylostoma duodenale
B. Necator americanus
C. Strongyloides stercoralis
D. Trichuris trichiura

C. Strongyloides stercoralis

Which nematode causes “iron deficiency anemia” in heavy infections?
A. Enterobius vermicularis
B. Hookworm
C. Trichuris trichiura
D. Strongyloides stercoralis

B. Hookworm

Which nematode can complete its life cycle entirely within the host?
A. Capillaria philippinensis
B. Ascaris lumbricoides
C. Strongyloides stercoralis
D. Trichuris trichiura

C. Strongyloides stercoralis

What nematode produces larvated eggs in stool?
A. Hookworm
B. Strongyloides stercoralis
C. Enterobius vermicularis
D. Capillaria philippinensis

D. Capillaria philippinensis

Which nematode has a male with a copulatory bursa?
A. Trichinella spiralis
B. Hookworm
C. Strongyloides stercoralis
D. Trichuris trichiura

B. Hookworm

Which nematode's larval form can disseminate to lungs, brain, and other tissues during hyperinfection?
A. Capillaria philippinensis
B. Strongyloides stercoralis
C. Hookworm
D. Ascaris lumbricoides

B. Strongyloides stercoralis

Which nematode can be confused with other larvae due to similar morphology?
A. Hookworm
B. Strongyloides stercoralis
C. Trichinella spiralis
D. Capillaria philippinensis

B. Strongyloides stercoralis

Which test increases sensitivity for light infections of Trichuris and Ascaris?
A. Kato-Katz technique
B. Giemsa stain
C. Modified acid-fast
D. Direct wet mount

A. Kato-Katz technique

Which nematode’s eggs are not routinely seen in stool, making diagnosis difficult?
A. Strongyloides stercoralis
B. Trichuris trichiura
C. Hookworm
D. Capillaria philippinensis

A. Strongyloides stercoralis

Which nematode can be transmitted through contaminated clothing or bedding?
A. Hookworm
B. Ascaris lumbricoides
C. Enterobius vermicularis
D. Trichinella spiralis

C. Enterobius vermicularis

Which nematode is most commonly seen in children?
A. Strongyloides stercoralis
B. Enterobius vermicularis
C. Ascaris lumbricoides
D. Trichinella spiralis

B. Enterobius vermicularis

Which nematode larva causes “serpiginous tracks” on the skin?
A. Strongyloides stercoralis
B. Ascaris lumbricoides
C. Trichuris trichiura
D. Ancylostoma braziliense

D. Ancylostoma braziliense

Which diagnostic technique is most sensitive for Strongyloides in light infections?
A. Kato-Katz
B. Harada-Mori
C. Baermann funnel
D. Thick smear

C. Baermann funnel

Which nematode undergoes hepatopulmonary migration in its life cycle?
A. Trichinella spiralis
B. Trichuris trichiura
C. Ascaris lumbricoides
D. Enterobius vermicularis

C. Ascaris lumbricoides

Which nematode is known for rhabditiform larvae with a short buccal canal and prominent genital primordium?
A. Hookworm
B. Strongyloides stercoralis
C. Ascaris lumbricoides
D. Capillaria philippinensis

B. Strongyloides stercoralis

What is the preferred stool examination method for Hookworm?
A. Scotch tape test
B. FLOTAC
C. Kato-Katz
D. ELISA

C. Kato-Katz

Which nematode’s female has a straight tail while the male has a coiled one?
A. Trichinella spiralis
B. Enterobius vermicularis
C. Ascaris lumbricoides
D. Hookworm

C. Ascaris lumbricoides

Which nematode causes a syndrome of chronic diarrhea, wasting, and hypoproteinemia?
A. Strongyloides stercoralis
B. Capillaria philippinensis
C. Trichuris trichiura
D. Enterobius vermicularis

B. Capillaria philippinensis

Which nematode is known for its potential to cause autoinfection and disseminated hyperinfection?
A. Trichinella spiralis
B. Hookworm
C. Capillaria philippinensis
D. Strongyloides stercoralis

D. Strongyloides stercorali