Ectoparasites

Question 1

Phylum Arthopoda

Answer 1

Bilaterally symmetrical
Tough exoskeleton made of chitin
Segmented bodies
Shed cuticle as they grow by ecdysis
Includes insects

Question 2

Pediculus humanus diseases and transmission

Answer 2

Human head and body louse
Egg = nit
Nymph - looks like adult but smaller
Adult - 6 legs with claws
Pediculosis - itching, tickling, irritability
Can cause secondary bacterial infection
- Rickettsia, Bartonella, Borrelia

Question 3

Ixodidae diseases and transmission

Answer 3

Hard ticks

Transmit Lyme disease