General Parasitology Multiple Choice Question And Answers

Question 1. True regarding ‘Tsetse fly’:

1. Lays single egg
2. Lays cluster of eggs
3. Gives birth to single larvae
4. Gives birth to multiple larvae

Answer. (1) (Lays single egg)

Female tsetse mate just once. After 7–9 days, she produces a single egg which develops into a larva within her uterus

Read And Learn More: Micro Biology And Immunology Multiple Choice Question And Answers

Question 2. Autoinfection is seen in all except:

1. Strongyloides
2. Taenia solium
3. Hymenolepis nana
4. Hymenolepis diminuta

Answer. (4) (H. diminuta)

Autoinfection is seen in CHEST: Cryptosporidium, H.nana, Enterobius, Strongyloides, and T.solium.

Question 3. Features of Anopheles mosquito:

1. Spots on wings
2. Lay eggs in cluster
3. Body at angle
4. Palpi as long as proboscis

Answer. (1, 3, 4) (Spots on wings, Body at angle, Palpi as long as proboscis)

• Culexlay eggs in clusters called rafts, whereas Anopheles eggs are laid singly.
• The maxillary palpi of Anopheles—are as long as proboscis
• The body of Anopheles—rests at an angle to the surface
• Anopheles has dark spots on wings.
  Identification features of Anopheles, Culex, and Aedes mosquitoes

Question 4. Which of the following parasite can enter through intact skin?

1. Giardia
2. Whipworm
3. Strongyloides
4. Trichinella

Answer. (3) (Strongyloides)

Mode of transmission:

• Giardia: Feco-oral route (infective form: cyst)
• Whipworm: Feco-oral route (infective form: embryonated eggs)
• Strongyloides: Skin penetration route (infective form: L3 filariform larva)
• Trichinella: By ingestion of raw or uncooked pork containing First stage (L1) larva

Question 5. Which among the following does not enter the human body via skin?

1. Ancyclostoma
2. Strongyloides
3. Trichinella
4. Necator

Answer. (3) (Trichinella)

• Mode of transmission of Hookworm (Ancyclostoma and Necator): Skin penetration route (infective form- L3 molariform larva)
• Other options: Refer previous explanation

Question 6. Which worm is the longest?

1. T. solium
2. T. saginata
3. Hookworm
4. A. lumbricoid’s

Answer. (2) (T. saginata)

• T. solium- adult worm measures 2–3 meters in length
• T. saginata- adult worm measures 5–10 meters in length
• Hookworm- adult worm measures 12 cm
• A. Lumbricidae adult worm 20–30 cm
• However, Diphyllobothrium is the longest cestode measuring 10 meters or more.

Question 7. Simple life cycle is seen in:

1. Ascaris
2. T. solium
3. Toxoplasma
4. Giardia
5. Schistosoma sp

Answer. (1, 4) (Ascaris, Giardia)

• Direct/Simple life cycle: Parasites that need only one host (man)

Question 8. Aedes Egyptians transmits:

1. JE
2. KFD
3. Yellow fever
4. Filaria
5. Dengue

Answer. (3, 4 and (5) (Yellow fever, Filaria and Dengue)

• Option a: JE caused by Culex mosquito
• Option b: KFD-Tick borne
• Option c, d, and e: Caused by bite of Aedes aegypti

Question 9. Fish acts as intermediate host in:

1. D. latum
2. Clonorchis kinesis
3. H. diminuta
4. H. nana

Answer. (1 and 2) (D. latum and Clonorchis kinesis)

• Fish acts as intermediate host: Diphyllobothrium latum, Clonorchis kinesis,
  Paragonimus Westerman (Crab fish), Metagonimus spp., Heterophyes heterophils
• In the case of H. nana Human, rat and mouse acts as a both definitive and intermediate hosts, no intermediate host.
• In the case of H. diminuta: the Flea acts as an intermediate host.

Question 10. Culex mosquito is associated with the transmission of:

1. Malaria
2. Filariasis
3. Dengue
4. Japanese encephalitis
5. Typhus

Answer. (2 and 4) (Filariasis and Japanese encephalitis)

• Option a: Malaria transmitted by – Anopheline mosquito
• Option b and d: Filariasis and Japanese encephalitis transmitted by – Culex mosquito
• Option c: Dengue transmitted by – Aedes aegypti.
• Option e: Typhus transmitted by – Louse and Flea

Question 11. Pigs are a reservoir for:

1. T. solium
2. T. saginata
3. Trichinella spiralis
4. Ancyclostoma
5. Identification

Answer. (1 and 3) (T. solium and Trichinella spiralis)

Both T. solium and Trichinella spiralis infection is acquired by ingestion of contaminated pork, (Pigs are reservoir hosts).