Evaluation of Microbiota and Weight Alterations After the Administration of Tetracycline and Lactobacillus gasseri in Rats.

Obesity is one of the largest current public health problems. Recent studies suggest that persistent changes in the intestinal microbiota (dysbiosis) can eventually lead to obesity. A stable core of intestinal microbiota exists, primarily composed of the phyla Firmicutes and Bacteroidetes, but their proportions can be altered by antibiotics.