Lactobacillus

• Gram-positive bacillus
• Normal flora in the genitourinary tract
• Rarely pathogenic
• Infections can be treated with penicillin or ampicillin
  • However, one study noted susceptibility to imipenem, piperacillin-tazobactam, erythromycin, and clindamycin, but variable susceptibility to penicillin and cephalosporins
  • Aerotolerant strains are often intrinsically resistant to vancomycin