But giardiasis may also occur in older dogs, or in animals suffering from other diseases, or those undergoing chemotherapy. Scanning electron micrograph of Giardia attached to the inner surface of the intestine. 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 anorexia. These signs are also associated with other diseases of the intestinal tract, and are not specific to giardiasis.
Diagnosis is confirmed by finding the cysts or motile stages in feces.
A negative report does not rule out Giardia . 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. Contact your veterinarian for the drug of choice and treatment program. All infected animals should be treated whether or not they show clinical signs.