Entomology & Helminthology B

Question 1

All the segments of the antennae are visible laterally in the following lice EXCEPT
a. Trichodectes
b. Felicola
c. Heterodoxus
d. Goniocotes

Answer 1

Heterodoxus

Heterodoxus is an amblycerate louse. Only one segment of antenna is visible laterally since most are concealed.

Question 2

The immature stages of which insect does not thrive in the water?
a. Aedes
b. Phlebotomus
c. Culex
d. Simulium

Answer 2

Phlebotomus

Question 3

Which hard tick secretes “cement substance” with its saliva to secure itself on the skin of its host?
a. Ixodes
b. Amblyomma
c. Hyalomma
d. Haemaphysalis

Answer 3

Haemaphysalis

Hard ticks with short hypostome, including Rhipicephalus and Dermacentor, secretes cement substance with its saliva to secure their attachment on the skin of their host.

Question 4

This is the sensory organ of fleas that help them locate a host by detecting air movements, vibrations & temperature gradients
a. Ctenidium
b. Haller’s organ
c. Sensillium
d. Johnston’s organ

Answer 4

Sensillium