Lice Flashcards
1
Q
What are the physical adaptations of lice?
A
- Claws
- Dorso ventrally flattened
- Wingless
2
Q
What are the two types of lice?
A
-Chewing (mallophagan) or sucking (anopluran)
3
Q
What type of lifecycle do lice have?
A
- Hemimetabola
- Egg-> nymphs -> adult
4
Q
Describe louse eggs
A
- Suboval
- Layed on the hair near to the skin
- Chicken lice lay their eggs in big clumps near base of feathers
5
Q
Define pediculosis
A
An infestation of lice
6
Q
What are the clinical signs of pediculosis?
A
Pruritus/ irritation Unthirftiness Rough coat Alopecia Anaemia in severe infestations
7
Q
What are the indirect affects of a lice infestation?
A
- Typhus (Rickettsia prowazekki)
- Louse borne relapsing fever (Borelia recurrentis)
- The pug louse (Haemotopinus suis) = mechanical vector of swine pox
- Dog lice - Trichodectes canis can also be an intermediate host for D caninum.
8
Q
How many sub orders are there in the Phthiraptera order?
A
4
9
Q
What type of lice are not found of birds?
A
Anoplian
10
Q
if the louse is seen being fairly active what sort it is most likely to be?
A
A chewing lice (mellaphagia)
11
Q
How are lice spread?
A
By direct contact
-Adults, nymphs and eggs can only survive a few days off host
