Dogs are victims of several internal parasites frequently referred to as worms. The most common are the roundworms that infest most puppies at some time in their young lives and tapeworms that can be a big problem when flea infestations are high.
Evidence of roundworms and tapeworms can be seen without the aid of a microscope, but other worms are not so easily diagnosed. Occasionally adult whipworms can be seen in the stool when the infestation has already caused some debilitation or weight loss in the dog.
Early diagnosis of the presence and species of intestinal parasite is important, for not all worms respond to the same treatment. Therefore, stool samples should be taken to the veterinarian for microscopic examination if worms are suspected. Many veterinarians include the stool check as part of the annual health examination.
Most worm infestations cause any or all of these symptoms: diarrhea, perhaps with blood in the stool; weight loss; dry hair; general poor appearance; and vomiting, perhaps with worms in the vomitus. However, some infestations cause few or no symptoms; in fact some worm eggs or larvae can be dormant in the dog's body and activated only in times of stress, or in the case of roundworms, until the latter stages of pregnancy, when they activate and infest the soon-to-be-born puppies.
Roundworms
Roundworms are active in the intestines of puppies, often causing a pot-bellied appearance and poor growth. The worms may be seen in vomit or stool; a severe infestation can cause death by intestinal blockage.
This worm can grow to seven inches in length. Females can produce 200 thousand eggs in a day, eggs that are protected by a hard shell and can exist in the soil for years. Dogs become infected by ingesting worm eggs from contaminated soil. The eggs hatch in the intestine and the resulting larva are carried to the lungs by the bloodstream.
The larva then crawls up the windpipe and gets swallowed, often causing the pup to cough or gag. Once the larvae return to the intestine, they grow into adults.
Roundworms do not typically infest adults. However, as mentioned above, the larvae can encyst in body tissue of adult bitches and activate during the last stages of pregnancy to infest puppies. Worming the ***** has no effect on the encysted larvae and cannot prevent the worms from infecting the puppies.
Although roundworms can be treated with an over-the-counter wormer found in pet stores, a veterinarian is the best source of information and medication to deal with intestinal parasites. Dewormers are poisonous to the worms and can make the dog sick, especially if not used in proper dosage.
Hookworms
These are small, thin worms that fasten to the wall of the small intestine and suck blood. Dogs get hookworm if they come in contact with the larvae in contaminated soil. As with roundworms, the hookworm larvae becomes an adult in the intestine. The pups can contract hookworms in the uterus and the dam can infest the pups through her milk.
A severe hookworm infestation can kill puppies, but chronic hookworm infection is usually not a problem in the older dog. When it does occur, the signs include diarrhea, weight loss, anemia, and progressive weakness. Diagnosis is made by examining the feces for eggs under a microscope.
Tapeworms
Another small intestine parasite, the tapeworm is transmitted to dogs who ingest fleas or who hunt and eat wildlife infested with tapeworms or fleas. The dog sheds segments of the tapeworm containing the eggs in its feces. These segments are flat and move about shortly after excretion. They look like grains of rice when dried and can be found either in the dog's stool or stuck to the hair around his anus. Tapeworms cannot be killed by the typical over-the-counter wormer; see the veterinarian for appropriate treatment.
Whipworms
Adult whipworms look like pieces of thread with one end enlarged. They live in the cecum, the first section of the dog's large intestine. Infestations are usually light, so an examination of feces may not reveal the presence of eggs. Several checks may be necessary before a definitive diagnosis can be made.
Prevention
Several worms that infect and reinfect dogs can also infect humans, so treatment and eradication of the worms in the environment are important. Remove dog feces from back yards at least weekly, use appropriate vermicides under veterinary supervision, and have the dog's feces checked frequently in persistent cases. Do not mix wormers and do not use any wormer if your dog is currently taking any other medication, including heartworm preventative, without consulting the veterinarian.
When walking the dog in a neighborhood or park, remove all feces so that the dog does not contribute to contamination of soil away from home as well.
Dogs that are in generally good condition are not threatened by worm infestations and may not even show symptoms. However, it's a good idea to keep the dog as worm-free as possible so that if disease or stress do take a toll, you're not fighting worms in a sick pet.
Heart Worms
Parasites go through several life stages before emergence as adults and often need at least two hosts to complete the cycle. In heartworms, a mosquito serves as the intermediate host for the larval stage of the worm, also known as the microfilariae. The mosquito ingests the larva when it bites an infected dog and deposits its cargo in an uninfected dog when seeking another blood meal. The microfilariae burrow into the dog and undergo several changes to reach adult form, then travel to the right side of the heart through a vein and await the opportunity to reproduce. Adult heartworms can reach 12 inches in length and can remain in the dog’s heart for several years.
Dogs can have some microfilariae in their blood and worms in their lungs without manifesting the disease. Once the number of worms exceeds a certain number based on the size and activity level of the dog, however, the adult worms move to the heart and symptoms begin to occur. Very active dogs may experience symptoms with lower numbers of worms than couch-potato dogs.
The time lag between the initial infestation of microfilariae and reproduction by adult worms living in the heart is six-to-seven months in dogs.
Female heartworms bear live young – thousands of them in a day. These young – the microfilariae – circulate in the bloodstream for as long as three years, waiting to hitch a ride in a bloodsucking mosquito. They undergo changes in the mosquito that prepare them to infect a dog, and they transfer back to the original host species the next time the mosquito bites. The process of change in the mosquito takes about 10 days in warm climates, but can take six weeks in colder temperatures.
The worms grow and multiply, infesting the chambers on the right side of the heart and the arteries in the lungs. They can also lodge in the veins of the liver and the veins entering the heart. The first sign of heartworm infestation may not manifest for a year after infection, and even then the soft cough that increases with exercise may be dismissed as unimportant by the owner. But the cough worsens and the dog may actually faint from exertion; he tires easily, is weak and listless, loses weight and condition, and may cough up blood. Breathing becomes more difficult as the disease progresses. The progression is traumatic: the dog’s quality of life diminishes drastically and he can no longer retrieve a Frisbee or take a long walk in the park without respiratory distress. Congestive heart failure ensues, and the once-active, outgoing pet is in grave danger.
2007-06-08 18:57:27
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answer #1
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answered by ♥♥The Queen Has Spoken♥♥ 7
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Worms are common in dogs. Treatment for worms is routine. When you get your next dog, when you take it in to the Vet the first thing they will do is check it for worms and to give basic worm treatment in case some weren't detected, plus any additional treatment for whatever worms are identified.
Heartworms can make a dog real ill and by the time they are getting close to death they will have trouble breathing and cough a lot. Heartworm tests are routinely given to dogs before starting them on Heartworm Prevention medicine- usually a tablet for a month at a time. If the test is positive, then the Vet will discuss heartworm treatment with you . Most likely your dog was ill and very possibly with other issues that killed it in addition to worms. Your dog likely had worms pretty badly already if you noticed them after just five days. You wouldn't have seen heartworms. Too many fleas can kill a small puppy or kitten.
2007-06-09 01:54:45
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answer #2
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answered by Anonymous
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