Antibiotic use and infection in snakebite victims

Area of Science:

• Medical Microbiology
• Infectious Diseases
• Toxicology

Background:

• Snakebite envenomation is a significant health concern, particularly in tropical and subtropical regions.
• Secondary bacterial infections can complicate snakebite management and influence patient outcomes.
• Current antibiotic use in snakebite patients varies, necessitating evidence-based guidelines.

Purpose of the Study:

• To investigate the incidence of bacterial infection in snakebite patients.
• To identify the specific bacterial species commonly associated with snakebite infections.
• To establish clear indications for antibiotic therapy in snakebite management.

Main Methods:

• A prospective trial was conducted involving 363 snakebite patients at Eshowe Hospital.
• Antibiotics were administered only when necrosis was present or anticipated, adhering to a strict protocol.
• Bacterial species were identified from necrotic tissue and abscesses; a swelling classification system was developed.

Main Results:

• The study observed a low incidence of infection in snakebite patients not treated with antibiotics.
• Gram-negative aerobic enterobacteriaceae were the predominant bacteria isolated (18 out of 20).
• No anaerobic bacteria were cultured from the infected sites.

Conclusions:

• Antibiotic therapy for snakebite patients should be reserved for cases with necrosis, which occurred in less than 10% of patients.
• Empirical antibiotic coverage should target Gram-negative aerobic bacilli and Gram-positive aerobic cocci.
• Adherence to antibiotic stewardship guidelines can prevent unnecessary use and potential resistance.