Goat Parasite Life Cycle Animations


Muellerius capillaris

Goat Lungworm

The tiny, white adult goat lungworm lives in the lung tissue within a grayish colored nodule

Life

Eggs are laid inside the nodule.
When they hatch the larvae escape the nodule and enter the interior of the alveoli.

Life

The first stage larvae migrate up the trachea and are swallowed.
The larvae move through the digestive system and are passed with the feces.

Life

Larvae are most active at moderate temperatures 63 to 80 F (17 - 27 C)
and can withstand fairly dry conditions.

Life

The larvae live free in the feces or soil.
They must penetrate the body of a land snail or slug in order to continue their life cycle.

Life

The larvae molt to the second then in about 2 weeks to the third stage inside the snail's body.
The larvae can live in the snail for life of the snail.

Life

The goat becomes infected when it accidentally eats the snail while feeding.

Life

The snail is digested in the stomach releasing the larvae which molt to the fourth stage,
travel to the small intestine where they penetrate the lymph glands.

Life

From the lymph vessels the larvae make their way to the blood which carry them to the
right side of the heart then to the lungs.

Life

The larvae mature to the adult stage in the lung alveoli where they mate and lay eggs.

The larvae cause some damage when they break through the lining of the alveoli.
In severe infections this can cause pneumonia or allergic reaction.

The first stage larva can be identified in the feces. 0.23 to 0.3 mm long.

Life