Changes

The life cycle of ''D. filaria'' is very similar to that of ''[[Dictyocaulus viviparus]]''. It is a direct life cycle, and the females are ovo-viviparous.  The females lays eggs which contain mature larvae.  The eggs hatch quickly, and the L3 larvae are ingested by the host.  The larvae then travel to the mesenteric lymph nodes where they moult.  They then travel to the lungs via the blood or lymphatic system.   

The life cycle of ''D. filaria'' is very similar to that of ''[[Dictyocaulus viviparus]]''. It is a direct life cycle, and the females are ovo-viviparous.  The females lays eggs which contain mature larvae.  The eggs hatch quickly, and the L3 larvae are ingested by the host.  The larvae then travel to the mesenteric lymph nodes where they moult.  They then travel to the lungs via the blood or lymphatic system.   

The final transformations occur in the bronchioles, and the adults fully mature in the bronchi, causing [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchitis]].

The final transformations occur in the bronchioles, and the adults fully mature in the bronchi, causing [[Bronchitis#Infectious causes of bronchitis or bronchiolitis|bronchitis]].

L1 larvae are then coughed and swallowed.  The larvae enter the intestinal tract, and are passed out in the faeces.

L1 larvae are then coughed and swallowed.  The larvae enter the intestinal tract, and are passed out in the faeces.