Changes

Cryptosporidiosis (view source)

Revision as of 16:20, 10 March 2011

373 bytes added , 16:20, 10 March 2011

no edit summary

Line 1: Line 1: −

==~~Overview~~==

+

== Introduction ==

−

~~Disease caused by the parasite [[Cryptosporidium|cryptosporidium]].~~

+

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

−

~~==Diagnosis==~~

−

*Faecal smear

+

== Clinical Signs ==

−

**Ziehl-Neelson (ZN) stain

−

**Oocysts stain red against a blue/green background

−

*Immunoassays

+

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

−

**Detect oocysts in ~~faeces~~

−

~~==Control==~~

+

<br>

−

*Isolate/quarantine bought-in calves

+

== Diagnosis ==

−

**Treat if signs of [[Diarrhoea|diarrhoea]] present

−

*Good hygiene, adequate bedding and ~~disinfection~~ of ~~calf pens~~ is ~~important~~

+

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. Immunoassayscan also be performed to detect oocysts in faeces.

−

*Prevention/treatment

−

**Halofuginone

−

***Halocur or Intervet

−

***Oral dosage

−

==~~Villus Atrophy in Enteritis~~==

+

== Control ==

−

* Affects calf, lamb, piglet, kitten.

+

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

−

* Increasingly important as part of the neonatal [[Diarrhoea|diarrhoea]] complex in calves.

−

* Zoonosis.

−

~~====Pathology====~~

+

If diarrhoea is present and cryptosporidium has been detected then treat with halofuginon, trade names Halocur or Intervet. This treatment is given orally.

−

~~=====Gross=====~~

+

<br>

−

* Intestines diffusely reddened, with fluid contents.

+

[[Category:To_Do_-_Review]]

−

~~=====Histological=====~~

−

* Tiny parasites on surface of epithelium.

−

* Villus atrophy and fusion.

−

* Iinflammation (mainly lymphoid) in crypts and lamina propria.

−

[[Category:To_Do_-~~_Clinical~~]]

Kthompson

482

edits