What category do roundworms and heartworms fall under?

Roundworms and heartworms belong to the category of nematodes. Nematodes are a diverse group of roundworms that are characterized by their elongated, cylindrical bodies, and they can be found in various environments, including soil, water, and as parasites in other organisms.

Both roundworms and heartworms have significant implications for veterinary medicine. Roundworms, such as Toxocara canis in dogs and Toxocara cati in cats, can cause gastrointestinal issues and can be transmitted to humans, especially children. Heartworms, primarily known as Dirofilaria immitis, reside in the heart and pulmonary arteries of infected pets, leading to severe cardiovascular complications if not treated.

Recognizing this categorization is important for understanding the life cycles, treatments, and prevention methods for these parasites in veterinary practice. The other categories listed—protozoa, fungi, and insects—refer to entirely different forms of organisms, each with distinct characteristics and classifications, which do not include roundworms or heartworms.