Hi, My daughter has Proteus Mirabilis >100,000 in her urine. She is 7.5 years old and 25.5 kg. She has pain in her bladder and belly. Pain is doing her bladder after urination. She use now (all of 2 days) Cefadroxil Monohydrat (500mg/5ml) 5ml 3 time per day. Is Cefadroxil Monohydrat good to kill Proteus Mirabilis? (two weeks ago, she used Amoxicillin of 100 ml 500mg/5ml 5ml 3 time per day but Amoxicillin has not helped.)

Proteus Mirabilis is a gram negative bacteria that causes urinary tract infections. Amoxicillin is not effective at treating Proteus. Cefadroxil, a first generation cephalosporin, can be used to treat Proteus urinary tract infections but its not the best choice as 10-20% of Proteus species can be resistant to this drug. Most pediatric patients are treated with broad spectrum penicillins (Mezlocillin), a third generation cephalosporin (Ceftriaxone), or Trimethoprim/sulfamethoxazole.