Question 1. True regarding ‘Tsetse fly’:
- Lays single egg
- Lays cluster of eggs
- Gives birth to single larvae
- 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:
- Strongyloides
- Taenia solium
- Hymenolepis nana
- 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:
- Spots on wings
- Lay eggs in cluster
- Body at angle
- 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?
- Giardia
- Whipworm
- Strongyloides
- 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?
- Ancyclostoma
- Strongyloides
- Trichinella
- 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?
- T. solium
- T. saginata
- Hookworm
- 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:
- Ascaris
- T. solium
- Toxoplasma
- Giardia
- Schistosoma sp
Answer. (1, 4) (Ascaris, Giardia)
- Direct/Simple life cycle: Parasites that need only one host (man)
Question 8. Aedes Egyptians transmits:
- JE
- KFD
- Yellow fever
- Filaria
- 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:
- D. latum
- Clonorchis kinesis
- H. diminuta
- 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:
- Malaria
- Filariasis
- Dengue
- Japanese encephalitis
- 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:
- T. solium
- T. saginata
- Trichinella spiralis
- Ancyclostoma
- 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).
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