|
|
| (6 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| − | {{review}}
| + | #REDIRECT[[:Category:Lice]] |
| − | | |
| − | ==Phthiraptera introduction==
| |
| − | Lice are obligate ectoparasites of every avian and most mammalian species. They are only a few millimeters long and like [[Fleas|fleas]], are wingless but unlike [[Fleas|fleas]] are dorsoventrally flattened.
| |
| − | | |
| − | Lice are host specific, permanent parasites which cause [[Parasitic skin infections - Pathology#Lice|pediculosis]]. The louse saliva and faeces contain allergenic substances which cause irritation, rubbing, licking and skin damage leading to decreased host productivity.
| |
| − | | |
| − | Mammalian lice species have a single pair of claws on the ends of stout legs, whereas avian lice species have a double claw on each leg.
| |
| − | | |
| − | There are two main groups of veterinary importance, the mallophaga (chewing lice) and anoplura (sucking lice).
| |
| − | | |
| − | <big>'''[[Chewing Lice]]
| |
| − | | |
| − | | |
| − | </big>
| |
| − | | |
| − | | |
| − | ==Anoplura==
| |
| − | [[Image:Sucking Louse.jpg|thumb|right|150px|Sucking Louse ''Pediculosis humanus'' - From: Genetic Analysis of Lice Supports Direct Contact between Modern and Archaic Humans Reed DL, Smith VS, Hammond SL, Rogers AR, Clayton DH PLoS Biology Vol. 2, No. 11, e340 doi:10.1371/journal.pbio.0020340]]
| |
| − | ''Also known as '''sucking lice''' ''
| |
| − | | |
| − | *Narrow head
| |
| − | | |
| − | *Thorax wider than the head
| |
| − | | |
| − | *Powerful legs
| |
| − | | |
| − | *Piercing mouthparts
| |
| − | | |
| − | *Feed on blood and tissue fluids
| |
| − | | |
| − | *Heavy infestations can cause anaemia
| |
| − | | |
| − | *Species occur only on mammals
| |
| − | | |
| − | ==Life cycle==
| |
| − | | |
| − | *The whole life cycle takes '''2-3 weeks'''
| |
| − | | |
| − | *The louse spends its whole life on the animal
| |
| − | **It can however survive for one week off the animal
| |
| − | | |
| − | *In some species [[WikiWords#P|parthenogenesis]] can occur
| |
| − | | |
| − | *Close contact transmission can occur
| |
| − | | |
| − | '''1. Eggs'''
| |
| − | | |
| − | *Known as nits
| |
| − | | |
| − | *Cemented to hairs
| |
| − | | |
| − | '''2. Nymphs'''
| |
| − | | |
| − | *Nymphs hatch from the egg (no larval stage)
| |
| − | | |
| − | *Undergoes several moults
| |
| − | | |
| − | '''3. Adults'''
| |
| − | | |
| − | *Females can lay up to '''10 eggs per day'''
| |
| − | | |
| − | <big> '''[[Pediculosis]]'''
| |
| − | | |
| − | '''[[Lice - Cattle]]
| |
| − | | |
| − | '''[[Lice - Sheep]]
| |
| − | | |
| − | '''[[Lice - Pigs]]
| |
| − | | |
| − | '''[[Lice - Horses]]
| |
| − | | |
| − | '''[[Lice - Dogs]]
| |
| − | | |
| − | '''[[Lice - Cats]]
| |
| − | | |
| − | '''[[Lice - Poultry]]
| |
| − | | |
| − | '''[[Lice - Donkey]]
| |
| − | | |
| − | '''[[Lice Flashcards]]
| |
| − | </big>
| |
| − | | |
| − | | |
| − | | |
| − | [[Category:Parasites]]
| |
| − | [[Category:Lice]]
| |