1. Fleas: Fleas are small, wingless insects that feed on the blood of cats and other animals. They can cause intense itching and irritation, and they can also transmit diseases like tapeworms.
2. Ticks: Ticks are small, parasitic arachnids that attach themselves to the skin of cats and other animals and feed on their blood. They can transmit diseases like Lyme disease, Rocky Mountain spotted fever, and tularemia.
3. Ear Mites: Ear mites are tiny parasites that live in the ears of cats and other animals. They cause intense itching and inflammation, and they can also lead to ear infections.
4. Roundworms: Roundworms are intestinal parasites that can affect cats of all ages. They are typically transmitted through ingestion of contaminated food or water. Symptoms of roundworm infection can include diarrhea, vomiting, weight loss, and a pot-bellied appearance.
5. Tapeworms: Tapeworms are intestinal parasites that can affect cats of all ages. They are typically transmitted through ingestion of fleas or other infected animals. Symptoms of tapeworm infection can include diarrhea, weight loss, and the presence of tapeworm segments in the cat's feces.
6. Hookworms: Hookworms are intestinal parasites that can affect cats of all ages. They are typically transmitted through ingestion of contaminated soil or water. Symptoms of hookworm infection can include diarrhea, vomiting, weight loss, and anemia.
7. Heartworms: Heartworms are parasitic worms that live in the heart and lungs of cats and other animals. They are transmitted through the bite of an infected mosquito. Symptoms of heartworm infection can include coughing, difficulty breathing, weight loss, and fatigue.
8. Coccidia: Coccidia are single-celled parasites that live in the intestines of cats and other animals. They can cause diarrhea, vomiting, weight loss, and dehydration.
9. Giardia: Giardia is a single-celled parasite that lives in the intestines of cats and other animals. It can cause diarrhea, vomiting, weight loss, and dehydration.
10. Cryptosporidium: Cryptosporidium is a single-celled parasite that lives in the intestines of cats and other animals. It can cause diarrhea, vomiting, weight loss, and dehydration.