Should you worry about your cat getting worms? Yes, especially if you have a new cat who hasn't yet been treated. Just about all kittens are infected with intestinal worms, passed on from their mother's milk or in the uterus. Adult animals may become infected, too, by coming in contact with an infected animal's feces. Many parasites are found in rodents and birds, and cats who hunt and eat these animals may contract worms.

Roundworms are one of the most common intestinal parasites found in felines. They can grow to four inches and look like fine spaghetti. A roundworm infection can seriously weaken a kitten. Symptoms include diarrhea, constipation, anemia, weight loss and a pot belly.

Tapeworms, also very common, are transmitted by fleas. They attach themselves to a cat's intestine, and their segmented eggs appear in the feces or adhere to the fur around a cat's tail; when dry, they resemble grains of rice.

Other parasites that can effect cats are bloodsucking hookworms, which can be passed to unborn kittens, and whipworms, which are particularly hardy although relatively rare in cats. The key to treatment is correct diagnosis. This will ensure that the medication is effective against the parasite your pet has. A dewormer that eliminates roundworms, for example, will not kill tapeworms. Your veterinarian can best determine the culprit-and prescribe the appropriate medication. Diagnosis may require microscopic examination, so it is very helpful if you can bring in a fresh fecal sample.

Your cat's medicine may come in the form of liquid or pills. If your vet prescribes pills, it is important that your cat swallows all her medication.

To avoid reinfection, good hygiene is essential. ANIMED recommends that you make sure your cat is free of fleas, and be sure to treat every cat in your home for the infestation. And take note, some worms can be passed from animals to humans. Every year about 10,000 children annually, for example, are infected with roundworms. You can avoid any problems by washing your hands before and after handing your pet, and never handle feces directly.