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Pork Roundworm Infection in Dogs

Trichinosis in Dogs

Trichinosis, also known as trichinellosis or trichiniasis, is a parasitic illness brought about by a roundworm (nematode) parasite named Trichinella spiralis, commonly referred to as the “pork worm.” This parasite predominantly spreads through the consumption of raw or undercooked pork, leading to infection in dogs, humans, and pigs.

During the developmental phase of the parasite’s life cycle, dogs and humans become infected by ingesting contaminated and inadequately cooked meat. Trichinella spiralis can cause severe illness and fatalities in humans, inducing significant inflammation in the body’s muscles as the parasite’s larvae migrate within. Puppies face a higher risk of infection compared to adult dogs.

Symptoms and Types

  • Gastrointestinal upset
  • Vomiting
  • Diarrhea
  • Inflammation of the muscles
  • Muscle pain
  • Muscle stiffness


The cause of infection is attributed to the roundworm parasite known as T. spiralis, which infiltrates the gastrointestinal system via contaminated raw meat. During its developmental phase, this parasite migrates into the muscles, where it can persist for years.


Diagnosis of trichinosis in dogs involves a thorough examination by your veterinarian, focusing on your dog’s dietary history and any unusual food consumption. Standard laboratory assessments include a complete blood count, biochemical profile, urinalysis, and fecal examination. A heightened presence of eosinophils, a type of white blood cell, in the complete blood count may indicate eosinophilia, commonly associated with allergies or parasitic infections. Should the fecal analysis reveal traces of roundworm fragments, additional fecal tests may be necessary to confirm the diagnosis. Given that the parasites migrate to the muscles, a muscle sample may be procured to detect the presence of the parasite within the muscle tissue.


For animals experiencing mild disease, typically, no treatment is necessary apart from administering specific antiparasitic drugs designed to target roundworms. These drugs help decrease the parasite load in the muscles.

Recovery and Management

Following the initial treatment, it’s important to keep a close watch on your dog for persistent muscle pains or any new symptoms. If any symptoms resurface, it’s advisable to seek advice from your veterinarian promptly. Preventing this infection is straightforward: avoid feeding your dog undercooked pork products and prevent access to waste containing pork leftovers.

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