But giardiasis may also occur in older dogs, or in animals suffering from other diseases, or those undergoing chemotherapy. Any immune suppressing factors in a dog or cat may allow a latent Giardia infestation to convert to a significantly important consideration. Scanning electron micrograph of Giardia attached to the inner surface of the intestine. Signs of Giardia in dogs and cats Clinical signs range from none in asymptomatic carriers, to mild recurring diarrhea consisting of soft, light-colored stools, to acute explosive diarrhea in severe cases. Other signs associated with giardiasis are weight loss, listlessness, mucus in the stool, and poor appetite.
Diagnosis is confirmed by finding the cysts or motile stages in feces.
Because cysts are only passed periodically, several fecal examinations may be necessary to diagnoses this parasite. At least three fecal samples, examined over a period of seven to ten days, should be examined. Special stains can be used, too, to assist in identifying these microscopic invaders. Contact your veterinarian for the drug of choice and treatment program. All infected animals should be treated whether or not they show clinical signs.