Cattle Medicine Q&A 09 - Revision history

Bara at 15:40, 2 September 2011

2011-09-02T15:40:16Z

Nlyons at 09:20, 31 August 2011

2011-08-31T09:20:56Z

Lwyasm1 at 09:16, 27 July 2011

2011-07-27T09:16:48Z

Ctrace at 14:19, 23 May 2011

2011-05-23T14:19:18Z

Ctrace: Created page with "{{Template:Manson}} 500px
'''A group of beef cattle presents with 4 weeks’ history of pruritus and extensive hair loss especial..."

2011-04-12T18:16:29Z

Created page with "{{Template:Manson}} centre|500px '''A group of beef cattle presents with 4 weeks’ history of pruritus and extensive hair loss especial..."

New page

{{Template:Manson}}

[[Image:Cattle Medicine 9.jpg|centre|500px]]

 

'''A group of beef cattle presents with 4 weeks’ history of pruritus and extensive hair loss especially over the shoulder, neck, and ears. The cattle are frequently observed rubbing against walls and fence posts.'''

 

<FlashCard questions="4">
|q1=What conditions would you consider?
|a1=
The most likely conditions to consider include: lice (pediculosis); forage mites; sarcoptic mange; chorioptic mange; ringworm (''Trichophyton'' spp. infection).
|l1=Pediculosis
|q2=Which further tests could be undertaken?
|a2=
Inspection of the skin reveals extensive louse infestation. 
Microscopic examination of skin scrapings reveal numerous chewing (round mouthparts; ''Damalinia bovis'') and sucking lice (narrow and more pointed mouthparts; ''Linognathus vituli'').
|l2=Lice - Cattle
|q3=What actions/treatments would you recommend?
|a3=
Treatment options include pour-on organophosphorous or pyrethroid (e.g.cypermethrin) compounds that effect rapid improvement but may require retreatment in 2–4 weeks. All in-contact cattle must be treated. Injectable avermectin products are not always wholly effective against chewing lice. 
Pediculosis is widespread in all beef herds and routine treatment is recommended at housing. Interestingly, bulls are invariably more severely affected than cows.
|l3=Ectoparasiticides
|q4=Are there any consequences of this problem?
|a4=
Disruption to grazing/feeding may cause reduced liveweight gain/loss of body
condition in severe infestations, although very heavy burdens are more often a
consequence rather than the cause of debility. Anaemia, as a consequence of
severe infestations, is rare.
|l4=
</FlashCard>

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