Worms in cats are a common occurance, especially in kittens, and your vet will test for them once per year. Testing is done by way of a stool sample.

Worms are intestinal parasites and may or may not cause visible signs of illness. Worms use your cat as a host in order to get nourishment, reproduce, and complete their lifecycle. There are a number of cat parasites, including a few major classes of worms.

The main types of intestinal worms in cats are hookworm, roundworm, and tapeworm. Fecal examinations are done as a diagnostic.

Given enough time, cats that share litter boxes will also share worm infestations. A fecal sample from one of the cats in the house is usually enough to determine if all are infected. All felines unlucky enough to live with an infeced cat will need to be treated.

Below is an overview on each of the major types of worms found in cats.

Roundworms - Roundworms (Toxocara Cati) have a spaghetti-like look to them, and you usually won't see them unless your cat vomits. Roundworm is common in kittens, who can become infected via their mothers, who may be asymptomatic. The mother cat may have the encysted form of the worm which lies dormant. Don't be surprised if your vet wants to worm your kitten 2-3 times, even if the test results are negative.

Mature cats often develop a natural immunity against roundworm. Adult cats, therefore, do not usually exhibit symptoms due to this parasite.

Hookworms - Hookworms hook themselves to the inside wall of your cat's intestines and hang on. Since they're tissue feeders, hookworms can cause blood loss, resulting in anemia. In addition, you may observe weight loss, intestinal illness, and poor hair coat. Most of the roundworm treatments used today will kill hookworms as well. Two or more treatments are required to eradicate this worm.

Tapeworms - Tapeworms consist of segments containing eggs. The segments drop off the worm, and along with the eggs are passed in the stool. They then dry out and begin to look like grains of rice and are fairly easy to spot. You'll sometimes see them in heavily traveled areas or around the cat's anus. Cats with these worms have been known to experience anal irritation and exhibit excessive licking.

Since these worms are transmitted by fleas, flea control is essential. Your cat eats the flea after the flea eats the tapeworm egg. The tapeworm then lives in the intestinal tract of your cat, and is able to start the process over.

Usually, there will be no visible signs of illness in your cat from tapeworms. Remember that as long as there are fleas, your cat is at risk. Until you completely get rid of the fleas, a potential tapeworm problem exists.

Your cat may have intestinal worms, but show no signs of illness. Cat parasites, like any illness, put undue stress on your cat. Keeping your cat's immune system up to speed is therefore vital. That includes not only regular vet visits, but also exercise, high quality cat food, and the room to play.

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Kurt Schmitt writes for cat lovers only keeping you informed about cat parasites and other feline health issues.