Supplementation of Diets With Influences Immune and Gut Function in Dogs.

refers to two species of blue green algae (, and ) consumed by humans as food for centuries. While, has been shown to have immune enhancing properties in several animal and human studies, there are no systematic studies in dogs. The aim of this study was to evaluate the immunomodulatory effect of dietary supplementation with in dogs. The study was conducted in two phases: Pre-test (8 wks.) and Test (42 wks.). Thirty adult dogs (mean 2.9 yrs.) were randomized into two groups and fed a nutritionally complete diet in the "Pre-test" phase. At the end of "Pre-test" phase all dogs received a rabies vaccine, and dogs in "test group" were switched to diet supplemented with dried (). Response to rabies vaccine was evaluated by Rapid Fluorescent Focus Inhibition Test (RFFIT). Gut immune response was assessed by measuring fecal IgA. Gut microbiota was evaluated by Temporal Temperature Gel Electrophoresis (TTGE) methodology. Repeated measures ANOVA was used to test for differences between groups and statistical significance considered to be < 0.05. Dogs fed diets supplemented with demonstrated enhanced immune status by showing significantly higher vaccine response and higher levels of fecal IgA as compared to the control group. Supplementing diets with also resulted in significantly increased gut microbiota stability in the test group. In conclusion, diets supplemented with significantly enhanced immune response and gut health in dogs.