Comparison of duodenal aspiration with fecal flotation for diagnosis of giardiasis in dogs

In a study comparing the effectiveness of fecal flotation and duodenal aspiration for detection of Giardia sp, 18 of 47 dogs were found to be infected. The organism was identified on a single fecal flotation in 7 of the infected dogs, and on a single duodenal aspiration in 16 of the infected dogs. In 2 dogs, the organism was identified by fecal flotation, but not on duodenal aspiration.