Difference between revisions of "Louse Life Cycle"

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*The whole life cycle takes '''2-3 weeks'''
  
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Both [[:Category:Sucking Lice|sucking]] and [[:Category:Chewing Lice|chewing lice]] have similar life cycles.  The females lay eggs, which are usually white.  The female is capable of producing several hundred eggs in a lifetime.  These stick to the hair or feathers on the host.    Sucking lice feed on blood using their piercing mouth parts.  Mammalian chewing lice feed on hair shafts or dermis.  The bird lice are also capable of digesting keratin, so can eat feathers.
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*The louse spends its whole life on the animal
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**It can however survive for one week off the animal
  
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There is no real metamorphosis.  The egg hatches into a nymph, which is essentially a juvenile louse.  They are similar to adults, except just smaller.
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*In some species [[WikiWords#P|parthenogenesis]] can occur
  
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After three further moults the adults usually fully mature. 
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*Close contact transmission can occur
  
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A heavy louse infestation is known as [[Pediculosis|pediculosis]].
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'''1. Eggs'''
  
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The complete life cycle takes around '''2-3 weeks''', and the louse generally spend their entire life on the host.
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*Known as nits
  
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In some species [[WikiWords#P|parthenogenesis]] may also occur.
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*Cemented to hairs
  
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{{Learning
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'''2. Nymphs'''
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|flashcards = [[Lice_Flashcards|Lice Flashcards]]
 
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|literature search =[http://www.cabdirect.org/search.html?q=%28title%3A%28lice%29+OR+title%3A%28louse%29%29+AND+title%3A%28%22life+cycle%22%29 Louse life cycle publications]
 
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}}
 
  
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==References==
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*Nymphs hatch from the egg (no larval stage)
  
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Taylor, M.A, Coop, R.L., Wall,R.L. (2007) '''Veterinary Parasitology''' ''Blackwell Publishing''
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*Undergoes several moults
  
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'''3. Adults'''
  
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{{review}}
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*Females can lay up to '''10 eggs per day'''
  
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{{OpenPages}}
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[[Category:Lice]]
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[[Category:To_Do_-_Parasites]]
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[[Category:Lice|B]]
 
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[[Category:Expert_Review]]
 

Revision as of 21:44, 25 June 2010

  • 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
  • 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
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