Antibiotic Treatment for Polymicrobial Infections

Initial Assessment and Treatment

• The Infectious Diseases Society of America recommends obtaining cultures from blood and abscess/wound material before starting antibiotics, and performing surgical drainage immediately if abscess, deep tissue infection, or necrotizing process is identified 1, 2
• The American College of Emergency Physicians suggests assessing for systemic signs, including fever, hypotension, tachycardia, altered mental status, or signs of septic shock 1

Antibiotic Selection

• The Centers for Disease Control and Prevention recommend azithromycin 500 mg daily for 3-5 days as first-line treatment for Campylobacter, with clinical cure rates of 96% and low resistance rates 3
• The World Health Organization advises against using fluoroquinolones empirically for Campylobacter due to high resistance rates, and recommends avoiding antimotility agents if Campylobacter is suspected 3, 4

Treatment Duration and Monitoring

• The Infectious Diseases Society of America recommends treating Campylobacter for 3-5 days, and monitoring for post-infectious complications such as Guillain-Barré syndrome, reactive arthritis, or Reiter's syndrome 3, 5
• The American College of Physicians suggests reassessing patients within 48-72 hours if no clinical improvement is seen, and reviewing culture results and susceptibility testing to narrow or adjust therapy 3

Special Considerations

• The Infectious Diseases Society of America recommends always treating immunocompromised patients with antibiotics, even for mild infections, and extending the duration of treatment to 14-21 days 1, 3
• The World Health Organization advises ensuring complete source control for polymicrobial infections, as incomplete drainage predicts treatment failure 2