Ticks are parasites that feed on the blood of their host and can in turn transmit diseases to your pets or even you. They are prolific breeders and their life cycles can extend through multiple seasons. Prompt removal or use of preventatives limit or prevent the spread of disease, or kill the ticks.
Toxoplasmosis is a disease caused by infection with the organism called Toxoplasma gondii. This is a microscopic single-cell protozoal organism related to coccidia. Toxoplasma occurs worldwide and infection in cats is similarly widespread. Although toxoplasmosisis a relatively common infection, it usually causes no disease in infected cats.
Whipworms are intestinal parasites that are about 1/4 inch (6 mm) long. They live in the intestinal tract of dogs where they cause severe irritation. Whipworm infection results in watery, bloody diarrhea, weight loss, and general debilitation. Any dog with chronic large bowel diarrhea should be suspected to have whipworms, even if the stool sample was negative. Whipworms are far less common today than in previous years, because of widespread use of modern heartworm prevention products.