Animal Parasites
Livestock and companion animal parasites include internal worms such as nematodes
(endoparasites) and external fleas, ticks, and flies (ectoparasites). Diseases
caused by nematodes include heartworm in dogs and cats and intestinal roundworm
infections of cattle, sheep, goats, and pigs.
Antiparasitic compounds are the dominant segment of the
veterinary pharmaceuticals market with global sales of approximately
$3.5 billion annually. Resistance to all major antiparasitic (anthelmintic) drug
classes is now widespread in intestinal nematodes of sheep and goats. Cases of
resistance are increasingly observed in the important North American cattle market.
Gaps remain in the spectrum of coverage of companion animal anthelmintic drugs
including poor control of whipworms and the lack of safe compounds for the
elimination of adult heartworms.
Related Links
Veterinary Parasitic Nematodes
Veterinary Parasitology
What is a Nematode?
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