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Gastrointestinal (GI) parasites can make your dog or cat—and sometimes even you—sick, which is why it’s so important to prevent infestations, and, if they do occur, to treat your pet quickly. Here are some of the things you need to know to keep your pets safe.
Even the cleanest, best cared-for pets are susceptible to these bugs, which take up residence in the stomach or intestines. The infection can be spread from mother to puppy or kitten or by fleas or rodents or through the feces. Good hygiene, regular visits to the veterinarian, preventive medicines and deworming treatments can keep your pets free of these pesky intruders. Luckily, if your pet is infected, many effective treatments options are available. Your vet can guide you on what is the best strategy for your pets.
Some GI parasites are big enough that you can actually see them; others are invisible without a microscope. Regardless of their size, GI parasites can cause serious illness and even death in pets. Here, the most common GI parasites in pets:
Roundworms: Visible to the naked eye, roundworms resemble small pieces of spaghetti. In people, roundworms can lead to larva migrans, an illness caused by migration of young worms through the nervous system, liver, lungs, and other organs. They can even travel to the eye and cause blindness.
Hookworms: These worms attach to the intestinal wall and suck blood and other nutrients from their hosts, leading to severe blood loss and diarrhea in infected pets. And larvae found in the environment can penetrate the skin and cause illness in a new host. When humans are infected, the condition is called cutaneous larva migrans. The tell-tale symptom? Itchy skin lesions with a snakelike pattern.
Tapeworms: These are long, flat worms made up of numerous segments containing tapeworm eggs. The immature stage of the tapeworm lives inside the flea. When your dog or cat grooms a flea off of its hair, it eats the flea—and the tapeworm, which then hatches inside your pet and continues its life cycle. You can become infected if you inadvertently eat tapeworm eggs or infected fleas.
Giardia: Giardia organisms are single-celled parasites that live in the intestines, and can be spread through fecal-contaminated water, food, or soil.
Whipworms: Whipworms live in the large intestines of dogs and shed eggs into the environment. When this occurs, the contamination can persist for years. Female whipworms can produce more than 2,000 eggs a day.
Coccidia: Coccidia are microscopic GI parasites. They can cause severe diarrhea in some infected pets.
Usually, GI parasites shed their eggs in the host’s feces. Once this occurs, other pets can be exposed through direct contact with the feces or contaminated soil, water, or plants. Some of these bugs can remain in the environment for months or years. Other parasites infect rodents and other small animals. When a dog or cat eats these animals, it becomes infected. Finally, GI parasites can infect puppies and kittens when they nurse from their infected mothers, and puppies can even become infected during fetal development.
Parasites are tricky, as often, dogs and cats don’t show any signs of illness. But if your pet has diarrhea, is vomiting or loses weight, he may have been infected. In this situation, a trip to your veterinarian is a good idea.
Fecal testing can detect GI parasites in most cases, but not always, which is why some veterinarians recommend deworming (administering medication to treat and control infections) even if the fecal test doesn’t confirm the existence of bugs. In fact, because puppies and kittens are commonly infected with GI parasites, many veterinarians routinely deworm them several times. Deworming medications are completely safe and come in a variety of formulations, including pills, chewable tablets, liquid medications and topical products that are applied to the skin between the shoulder blades. Your veterinarian can recommend the most appropriate deworming medications for your pet.
There is no single medication that can treat and prevent all GI parasites, but many monthly heartworm preventive medications also control some of these microscopic bugs. Your veterinarian can recommend several safe and effective medications.
To protect your pet and your family, take the following precautions:
This article was reviewed by a Veterinarian.
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