The article provides information about the Capillaria (pearsonema) plica among cats and dogs. It states that the disease is a common parasite of the urinary system of wild canids and mustelids with a worldwide distribution. The disease can be treated with 0.2 milligrams/kilograms doramectin (Dectomax; Pfizer) administered subcutaneously on the basis of reports that ivermectin is effective against Capillaria in the bladder.