Symptoms of parasite infection in cats include:
1. Weight loss and malnutrition: As parasites multiply in large numbers in a cat's body, they absorb the nutrients from the food the cat ingests, causing the cat to gradually lose weight and become malnourished.
2. Dry and dull fur: After being infected with parasites, a cat's fur may become dry, dull, and may even experience significant hair loss.
3. Loss of appetite and indigestion: Cats may experience symptoms such as loss of appetite and indigestion. Even if their appetite is normal, they may lose weight instead of gaining it.

4. Diarrhea and vomiting: Cats may experience frequent diarrhea or vomiting, which could be due to digestive problems caused by parasitic infections.
5. Abdominal discomfort and bloating: Parasitic infections can cause abdominal discomfort and bloating in cats, making their abdomen feel hard rather than soft.
6. Lethargy: After being infected with parasites, a cat's mental state may be affected, and it may become lethargic.