Ascaris species, Roundworm

Ascaris species are roundworms that can be detected in stool. They are intestinal worms and are not considered a normal part of the dog’s gut microbiome. Dogs may be exposed by swallowing roundworm eggs from contaminated soil, grass, faeces, dog parks, kennels, or areas where infected animals have passed stool. Exposure may also occur when dogs eat contaminated material or small animals that may carry roundworm larvae. Roundworms mainly live in the small intestine, where they can interfere with digestion and nutrient absorption. In puppies or dogs with heavier infections, relevant findings may be associated with a pot bellied appearance, poor growth, dull coat, vomiting, diarrhoea, weight loss, reduced appetite, or visible worms in stool or vomit. A positive finding may be useful to review with a veterinarian, especially if digestive signs, visible worms, poor growth, weight loss, or possible exposure to contaminated environments are present, since roundworm eggs can survive in the environment for long periods.