Drenching for internal parasites is an important routine on a sheep station.

It was worse than the idea of internal parasites.

A number of internal and external parasites have been detected in this species.

From his tone, you would think he was discussing internal parasites, thought Kirk.

They are generally more resistant to internal parasites than conventional sheep.

This behaviour tends to limit the spread of internal parasites.

Pets can acquire internal parasites in a variety of ways.

Chicory is well known for its toxicity to internal parasites.

They also stress easily, are prone to skin infections, and internal parasites.

Her first thought was that they had to be some kind of rad-mutated internal parasite.