Week 9

Question 1

Fleas (Siphonaptera) - Morphologies

Answer 1

• lateral flattening body shape
• Wings are absent with the hind legs specialized for jumping.
• have piercing-sucking mouthparts and spines on the body projecting backward.
• posses simple eyes with a single biconvex lens

Question 2

Life Cycle

Answer 2

Page 15, 18, 19 - Week 9

Question 3

Feeding behaviour

Answer 3

• Both sexes take blood meals and can be vectors.
• Female take blood meal then begin to lay eggs
• can survive several months without feeding

Question 4

Medical Important fleas:

Answer 4

1. Rat fleas (Xenopsylla cheopis)
2. Cat fleas (Pinjal) (Ctenocephalides felis)
3. Dog fleas (Ctenocephalides canis)
4. Human flea (Pulex irritans)

1 & 4 being more important

Question 5

Control Measures

Answer 5

• Chemical Controls
• Physical Control
• Chemical Treatment

Question 6

Lice

Answer 6

Phthiraptera

Question 7

Four suborders:

Answer 7

❖the Anoplura (sucking lice)
❖the Amblycera, Ischnocera, and Rhynchophthirina (collectively known as chewing lice or biting lice)

Question 8

Morphologies:

Answer 8

• 0.35-10 mm in the adult stage
• wingless
• dorsoventrally flattened

Question 9

Life Cycle:

Answer 9

• transmitted from person to person through direct or close contact
• can be as short as 16 days
• can lay up to 150-300 eggs during lifetime of a female
• hemimetabolous life cycle

Question 10

Medical Importance:

Answer 10

• Pediculosis