Management of Rat Bites

Immediate Wound Management

The Infectious Diseases Society of America recommends wound cleansing as the cornerstone of rat bite treatment, taking priority over antibiotic administration, and suggests irrigating the wound immediately and thoroughly with sterile normal saline or water to remove debris and reduce bacterial load 1, 2
The Centers for Disease Control and Prevention guidelines advise against using iodine- or antibiotic-containing solutions for routine cleansing, and recommend removing only superficial debris, as deeper debridement is usually unnecessary and should be done cautiously to avoid enlarging the wound 1
The American College of Emergency Physicians suggests that infected wounds should not be closed, and for clean wounds seen early, approximation with Steri-Strips rather than sutures is preferred, with delayed primary or secondary closure 1
Facial wounds are an exception and may be closed primarily after meticulous care and prophylactic antibiotics, according to the American Academy of Dermatology 1

The American College of Clinical Pharmacy recommends amoxicillin-clavulanate as first-line oral therapy for infected rat bites, providing coverage for typical wound pathogens and anaerobes 3, 4
The Infectious Diseases Society of America suggests alternative oral options, including cephalosporins, penicillinase-resistant penicillins, doxycycline, and fluoroquinolones, for established infections 3
The Society for Healthcare Epidemiology of America recommends intravenous therapy, including ampicillin-sulbactam, piperacillin-tazobactam, second-generation cephalosporins, and carbapenems, for severe infections 3, 4

The Centers for Disease Control and Prevention advise that tetanus prophylaxis is mandatory for rat bites, and recommend administering tetanus toxoid 0.5 mL intramuscularly if vaccination status is outdated or unknown 1, 5
The American Academy of Pediatrics suggests that for dirty wounds, a booster is needed if it has been more than 5 years since the last dose, and for clean wounds, a booster is needed if it has been more than 10 years since the last dose 6

The World Health Organization recommends that rabies prophylaxis is generally not required for domestic rat bites in the United States, as small rodents are rarely infected with rabies, but consultation with local health departments is necessary for regional risk assessment 1, 7
The Centers for Disease Control and Prevention suggest considering prophylaxis only for feral or wild rodent bites in high-prevalence areas, and administering rabies immunoglobulin and vaccine if indicated 7, 2

The American College of Emergency Physicians recommends elevating the injured extremity to reduce swelling and accelerate healing, and following up within 24 hours by phone or office visit for all outpatients 1, 5
The Society for Healthcare Epidemiology of America suggests hospitalization is indicated if infection progresses despite appropriate antimicrobial therapy, deep tissue involvement is suspected, or the patient is immunocompromised or has significant comorbidities 1

The Infectious Diseases Society of America recommends standard wound infections be treated for 7-10 days, septic arthritis for 3-4 weeks, and osteomyelitis for 4-6 weeks 1, 5

Hand wounds or wounds near joints/bones require prophylactic antibiotics, as recommended by the Infectious Diseases Society of America, due to the high risk of infection and potential penetration into synovium or bone 8

The American College of Emergency Physicians and the Infectious Diseases Society of America suggest that hand wounds near joints require expert evaluation for potential penetration into synovium or bone, and may necessitate hospitalization and intravenous antibiotics, with a treatment duration of 7-10 days for standard wound infections 8