Changes

{| cellpadding="10" cellspacing="0" border="1"  

{| cellpadding="10" cellspacing="0" border="1"  

| Predilection site

| Predilection site

The lifecycle of ''N. battus'' is different from to the common '''Trichostrongyle''' lifecycle.

The lifecycle of ''N. battus'' is different from to the common '''Trichostrongyle''' lifecycle.

L1-L3 occurs within the egg.  The larvae takes several months to develop.  Hatching is stimulated by a cold period followed by a night/day temperature of around 10 degrees.  The L3 are highly susceptible to changes in climate, so must be ingested soon after moulting to ensure the success of infection.

L1-L3 occurs '''within''' the egg.  The larvae takes several months to develop.  Hatching is stimulated by a cold period followed by a night/day temperature of around 10 degrees.  The L3 are highly susceptible to changes in climate, so must be ingested soon after moulting to ensure the success of infection.

Pathology is seen when large number of '''larvae''' inhabit the small intestine.

Pathology is seen when large number of larvae inhabit the small intestine.

''N. battus'' can only hatch from eggs excreted on to pasture in the previous year.

''N. battus'' can only hatch from eggs excreted on to pasture in the previous year.