Parasite Identification and recall! -- Practical pt. 2!

Lice genus

Phthiraptera

Pediculosis

A lice infestation

Lice life cycle type

Hemimetaboloa = INCOMPLETE metamorphosis + no pupal stage

2 key groups = Chewing lice + sucking live

HOw to identify A LOUSE

head thorax abdomen, 6 legs, insect.

Sucking or chewing louse?

head vs thorax

What genus and type is this louse?

Sucking louse,, Haematopinus…

Key Identification features

•Distinct ocular points behind the antennae,

•All legs of a similar size

•3-6mm in length

Host species

Species include the pig louse H. suis (the only species of louse found on pigs), H. asini on horses and H. eurysternus on cattle.

What genus and type is this louse?

Linognathus (long)

sucking louse..

Key Identification features

•Do not have eyes or ocular points,

•The second and third pair of legs are larger than the first, and end in stout claws

•Up to 2.5mm in length

Host species

found on sheep (L. ovillus) , goats, cattle (L. vituli ) and dogs (L. setosus).

Genus and type of louse?

Damalina

They are a chewing louse, but stick their heads in the ground and produce a ‘ DAM’

Key Identification features

•Damilina have rounded heads with 3 segmented antenna.

•The tarsi carry a single claw

•1-2mm in length

Host species

There are a number of similar host specific species the most important of which are Damaliniaovison sheep and D. bovis (sometimes called Bovicolabovis) on cattle also of interest are D. equi on horses and D. capraeon goats

Trichodectes - head is broader rather than longer..

Felicola louse

3 typesof bird lice genus

• liperurus

• menacanthus

• cuclotogaster