Fig. 4From: A 3-year retrospective analysis of canine intestinal parasites: fecal testing positivity by age, U.S. geographical region and reason for veterinary visitProportion of test results positive for ascarids, Giardia, hookworms or whipworms by the centrifugation method and coproantigen assay according to U.S. Census Bureau regions and age category. Combined refers to positive results by either the coproantigen immunoassay or the centrifugation methodBack to article page