Difference between revisions of "Metastrongylus"

Revision as of 16:18, 19 February 2011

Found in the bronchioles and smaller bronchi.
Three species, but these are all very similar.
Look like the Dictyocaulus species in ruminants and produce similar pathology.
Very pathogenic and can cause severe lung damage.
Even low level infections will check growth.
Immunity develops quickly.
Larvated eggs with a wavy outline passed in faeces.
Intermediate host is the earthworm, therefore this only affects outdoor pigs.
Becoming more common with the trend towards free-range husbandry.
Infection occurs when the earthworm is eaten.
Larvae migrate via the mesenteric lymph nodes to the lungs.

Found in bronchioles and smaller bronchi
Grossly:
- Small grey nodules, especially along ventral border of caudal lobes
- Adult worms in bronchi and bronchioles
Histologically:
- Catarrhal and eosinophilic bronchitis and bronchiolitis
- Possibly atelectasis
Rarely becomes extensive
May transmit swine influenza

@@ Line 14: / Line 14: @@
-*Found in [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchioles and smaller bronchi]]
+*Found in [[Bronchitis#Infectious causes of bronchitis or bronchiolitis|bronchioles and smaller bronchi]]
 *Grossly:
 **Small grey nodules, especially along ventral border of caudal lobes