Microbial populations in the feces of antibiotic treated rats.

<p>(A) Vancomycin (60mg/kg/day) and (B) a mixture of streptomycin (120 mg/kg/day), neomycin (60 mg/kg/day), polymyxin B (60 mg/kg/day), and bacitracin (120 mg/kg/day) administered orally reduced total microbial numbers and altered abundance of microbial taxa. Microbial abundance was determined using PCR. The X-axis labels show taxa of microbes grouped by bacteria (black), fungi (green), and archaea (red). Data are mean ±SD, n = 6/group. * p ≤ 0.05; day 0 vs. day 7. ND = not detected. The results from the vancomycin treatment in Fig 2A are reproduced with permission from reference 5.