Difference between revisions of "Cryptosporidiosis"

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==Overview==
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{{OpenPagesTop}}
Disease caused by the parasite [[Cryptosporidium|cryptosporidium]].
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== Introduction ==
  
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This is a '''zoonotic''', diarrhoea-causing, disease of cattle and other domestic livestock caused by the parasite ''[[Cryptosporidium]]''. It is a [[:Category:Protozoa|protozoan parasite]] that inhabits crypt cells of the intestine. Transmission of the disease is faeco-oral. The disease is severe in humans and can be fatal in the immunocompromised. It causes severe sickness and diarrhoea for up to two weeks.
  
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== Clinical Signs ==
  
==Diagnosis==
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Often seen in adolescent calves, may present as a sudden outbreak or as sporadic disease. Animals may have weight loss and appear dull and depressed. Diarrhoea will be profuse and watery and may appear green/black.
  
*Faecal smear
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== Diagnosis ==
**Ziehl-Neelson (ZN) stain
 
**Oocysts stain red against a blue/green background
 
  
*Immunoassays
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Clinical signs and age of cattle will provide a presumptive diagnosis. A faecal smear with '''Ziehl-Neelson''' (ZN) stain is diagnostic and if ''Cryptosporidium'' is present then oocysts stain red against a blue/green background. Immunoassays can also be performed to detect oocysts in faeces.
**Detect oocysts in faeces
 
  
==Control==
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== Control ==
  
*Isolate/quarantine bought-in calves
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Isolate/quarantine bought-in calves maintain good hygiene by providing adequate bedding and disinfecting calf pens.
**Treat if signs of [[Diarrhoea|diarrhoea]] present
 
  
*Good hygiene, adequate bedding and disinfection of calf pens is important
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If diarrhoea is present and ''Cryptosporidium'' has been detected then treat with halofuginon. This treatment is given orally.
  
*Prevention/treatment
 
**Halofuginone
 
***Halocur or Intervet
 
***Oral dosage
 
  
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{{review}}
  
==Villus Atrophy in Enteritis==
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{{OpenPages}}
  
* Affects calf, lamb, piglet, kitten.
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[[Category:Intestinal Diseases - Cattle]]
* Increasingly important as part of the neonatal [[Diarrhoea|diarrhoea]] complex in calves.
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[[Category:Expert_Review - Farm Animal]]
* Zoonosis.
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[[Category:Zoonoses]]
 
 
====Pathology====
 
 
 
=====Gross=====
 
 
 
* Intestines diffusely reddened, with fluid contents.
 
 
 
=====Histological=====
 
 
 
* Tiny parasites on surface of epithelium.
 
* Villus atrophy and fusion.
 
* Iinflammation (mainly lymphoid) in crypts and lamina propria.
 
 
 
[[Category:To_Do_-_Clinical]]
 

Latest revision as of 16:17, 30 July 2012


Introduction

This is a zoonotic, diarrhoea-causing, disease of cattle and other domestic livestock caused by the parasite Cryptosporidium. It is a protozoan parasite that inhabits crypt cells of the intestine. Transmission of the disease is faeco-oral. The disease is severe in humans and can be fatal in the immunocompromised. It causes severe sickness and diarrhoea for up to two weeks.

Clinical Signs

Often seen in adolescent calves, may present as a sudden outbreak or as sporadic disease. Animals may have weight loss and appear dull and depressed. Diarrhoea will be profuse and watery and may appear green/black.

Diagnosis

Clinical signs and age of cattle will provide a presumptive diagnosis. A faecal smear with Ziehl-Neelson (ZN) stain is diagnostic and if Cryptosporidium is present then oocysts stain red against a blue/green background. Immunoassays can also be performed to detect oocysts in faeces.

Control

Isolate/quarantine bought-in calves maintain good hygiene by providing adequate bedding and disinfecting calf pens.

If diarrhoea is present and Cryptosporidium has been detected then treat with halofuginon. This treatment is given orally.




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