Dog Bite Management Follow-up

Antibiotic Management

• The Infectious Diseases Society of America recommends preemptive antimicrobial therapy for 3-5 days for patients who are immunocompromised, asplenic, have advanced liver disease, have edema of the affected area, have moderate to severe injuries, or have injuries that may have penetrated the periosteum or joint capsule 1
• Amoxicillin-clavulanate is the preferred antibiotic as it provides coverage against both aerobic and anaerobic bacteria commonly found in dog bite wounds 2
• Alternative oral options include Doxycycline, which has excellent activity against Pasteurella multocida, and Fluoroquinolones with additional anaerobic coverage 3, 4
• For patients unable to take oral medications, IV options include ampicillin-sulbactam, piperacillin-tazobactam, second-generation cephalosporins, or carbapenems 3

Wound Management

• Primary closure is generally not recommended for dog bite wounds except for facial wounds, which should receive copious irrigation with sterile normal saline, cautious debridement of devitalized tissue, preemptive antibiotics, and primary closure for optimal cosmetic results 3, 5
• Non-facial wounds may be approximated rather than fully closed 5

Tetanus Prophylaxis

• Tetanus toxoid should be administered to patients without vaccination within the past 10 years, with Tetanus, diphtheria, and pertussis (Tdap) preferred over Tetanus and diphtheria (Td) if the former has not been previously given 5

Rabies Prophylaxis

• Consultation with local health officials is recommended to determine if rabies post-exposure prophylaxis should be initiated, and if indicated, rabies prophylaxis should include both rabies immunoglobulin and vaccine for previously unvaccinated individuals 1, 6

Follow-up Evaluation

• All patients should be seen in follow-up within 48-72 hours to assess for signs of infection and evaluate wound healing progress, with consideration of additional wound care if needed 3, 4

Special Considerations

• Hand wounds require special attention due to higher risk of infection and functional complications, and deep wounds near joints or bones should be evaluated for potential penetration of periosteum or joint capsule 1, 3
• Immunocompromised patients require more aggressive follow-up due to higher infection risk 1

Potential Complications

• Infectious complications include cellulitis, abscess formation, septic arthritis, osteomyelitis, and rarely bacteremia, while non-infectious complications include nerve or tendon injury, compartment syndrome, post-traumatic arthritis, and scarring 3

Dog Bite Management Guidelines

Rabies Risk Assessment and Management

• A healthy dog that bites should be confined and observed daily for 10 days without administering rabies vaccine during the observation period, as recommended by the Centers for Disease Control and Prevention (CDC) 7, 8, 9
• If signs suggestive of rabies develop, the animal should be euthanized and the head submitted for brain examination, according to the CDC guidelines 7, 8
• Any stray or unwanted dog that bites may be euthanized immediately and the head submitted for rabies examination, as per the CDC recommendations 7, 8, 9

Post-Exposure Prophylaxis After Dog Lick Without Visible Skin Break

Rabies Risk Assessment

• Rabies transmission requires the virus to penetrate the skin barrier, and exposures that pose transmission risk include percutaneous injuries, contact of mucous membranes, or contact of non-intact skin with potentially infected saliva, as stated by the Centers for Disease Control and Prevention (CDC) 10, 11
• Saliva is not considered infectious for bloodborne pathogens unless it contacts broken skin or mucous membranes, according to the CDC 12, 13
• Intact skin exposure to dog saliva does not warrant rabies PEP, even if the dog's rabies status is unknown, as recommended by the CDC 10, 11
• You must carefully examine the nail area for any breaks in skin integrity, including cuts, abrasions, hangnails, paronychia, or any disruption of the epidermal barrier, as advised by the CDC 10, 11
• If there is any doubt about skin integrity, the exposure should be treated as a potential rabies risk and the dog should be confined and observed for 10 days, as suggested by the CDC 14, 11
• If the skin is definitively intact with no visible breaks, rabies PEP is not indicated, according to the CDC 10, 11

When Rabies PEP IS Indicated

• If a healthy domestic dog can be confined and observed for 10 days, initiate observation without starting PEP, and only begin PEP if the dog develops signs of rabies during observation, as recommended by the CDC 14, 11
• If the dog is stray, unwanted, or cannot be observed, initiate rabies PEP immediately if there was any skin break, regardless of how minor, as advised by the CDC 10, 11
• Rabies PEP should be administered regardless of delay, since incubation periods exceeding 1 year have been documented, and it remains indicated even with late presentation, according to the CDC 11

Practical Management Algorithm

• Immediate wound care should include thoroughly washing the area with soap and water, even if no break is visible, as recommended by the CDC 10, 11
• A careful skin examination should inspect for any breaks, abrasions, hangnails, or compromised skin integrity around the nail area, as advised by the CDC 10, 11
• If skin is intact, no rabies PEP is needed, and no antibiotics are needed unless the patient is immunocompromised with concern for microscopic breaks, according to the CDC 10, 11
• If any skin break is present, confine and observe the dog for 10 days if possible, and initiate rabies PEP only if the dog cannot be observed or develops signs of illness, as recommended by the CDC 11

Management of Dog Bite Infections

Treatment Duration and Dosing

• For established infections, such as septic arthritis, the Infectious Diseases Society of America recommends 4 weeks of antibiotic therapy, and for osteomyelitis, 6 weeks of antibiotic therapy 15
• The standard oral dosing for animal bites is amoxicillin-clavulanate 875/125 mg twice daily, providing coverage against both aerobic and anaerobic bacteria, as recommended by the Infectious Diseases Society of America 16

Critical Follow-Up and Hospitalization

• If infection progresses despite appropriate antimicrobial therapy, hospitalization should be considered, as suggested by the Clinical Infectious Diseases guidelines 15

Rabies Post-Exposure Prophylaxis Guidelines

Immediate Assessment and Wound Management

• The Centers for Disease Control and Prevention recommends thoroughly washing the wound with soap and water for 15 minutes immediately, as this is the single most effective measure for preventing rabies infection and markedly reduces transmission risk in animal studies 17
• Any penetration of skin by teeth constitutes a bite exposure requiring evaluation, regardless of wound severity or location 18

Decision Algorithm for Rabies PEP

• If the puppy is healthy and available for 10-day observation, do not initiate rabies vaccination immediately—instead, confine and observe the puppy for 10 days, and only begin post-exposure prophylaxis if the animal develops signs of rabies during this period, as recommended by the CDC 19
• A healthy domestic dog that remains alive and healthy for 10 days after biting would not have been shedding rabies virus in its saliva at the time of the bite, according to the CDC guidelines 19
• Begin post-exposure prophylaxis only if the puppy develops signs suggestive of rabies during the 10-day observation period, such as behavioral changes, paralysis, excessive salivation, aggression, or other neurological signs 19
• If signs of rabies develop, the animal should be euthanized immediately and its head submitted for laboratory testing while simultaneously initiating PEP in the exposed person, as per CDC recommendations 19

Complete PEP Regimen (If Indicated)

• For previously unvaccinated individuals, administer both human rabies immune globulin (HRIG) at 20 IU/kg body weight on day 0 AND a 4-dose vaccine series on days 0, 3, 7, and 14, as recommended by the CDC 17
• Infiltrate the full calculated dose of HRIG around and into the wound(s) if anatomically feasible, with any remaining volume injected intramuscularly at a site distant from vaccine administration, according to CDC guidelines 17
• Never administer HRIG in the same syringe or at the same anatomical site as the vaccine, as recommended by the CDC 17
• For previously vaccinated individuals, administer only 2 doses of vaccine on days 0 and 3—do NOT give HRIG, as it will suppress the anamnestic antibody response, according to the CDC and MMWR Recommendations and Reports 20, 17

Critical Pitfalls to Avoid

• Do not withhold PEP while waiting for the 10-day observation period to complete if the puppy is unavailable for observation or shows any signs of illness, as recommended by the CDC 19
• Regional rabies epidemiology varies significantly—in the United States, dog rabies is rare, but consultation with local health officials is essential for risk assessment, according to the CDC 19

Dog Bite Management Guidelines

Immediate Wound Irrigation

• Use sterile normal saline delivered with a syringe of ≥ 20 mL for wound irrigation; avoid high‑pressure streams because they can force bacteria deeper into tissue. 21
• Perform careful removal of superficial debris and foreign material; deeper debridement should be limited to prevent unnecessary enlargement of the wound. 22

Antibiotic Prophylaxis

• Provide pre‑emptive oral amoxicillin‑clavulanate for 3–5 days in high‑risk bites (e.g., wounds on the hand, foot, face, or genital area) to cover Pasteurella, Staphylococcus, Streptococcus, and anaerobes. [21][22]
• Do not start prophylactic antibiotics if presentation occurs ≥ 24 hours after the bite and there are no clinical signs of infection. 21

Wound Closure Decisions

• Facial wounds – primary closure is acceptable after thorough irrigation, cautious debridement, and initiation of prophylactic antibiotics to achieve optimal cosmetic outcome. 22
• Non‑facial wounds – avoid primary closure; instead approximate margins with adhesive strips and plan delayed primary or secondary closure. 22
• Infected wounds – never close primarily; manage infection first. 22

Tetanus Prophylaxis

• Administer tetanus toxoid 0.5 mL IM when the last tetanus vaccine was > 10 years ago for clean, minor bites, or > 5 years ago for contaminated or more severe bites, or when vaccination status is unknown. 22

Hand Bite Management

• Treat hand bites aggressively because of the heightened risk of septic arthritis, osteomyelitis, and functional impairment. 22

Management of Established Infections

These durations apply to confirmed infections following dog bites. 22

Pitfalls to Avoid

• Do not employ high‑pressure irrigation, as it may disseminate bacteria into deeper tissues. 21
• Do not close infected wounds or high‑risk non‑facial wounds primarily. 22

Evidence‑Based Management of Pediatric Dog Bite Injuries

Antibiotic Prophylaxis

• For high‑risk dog‑bite wounds—those located on the hand, foot, face, genital area, that are moderate‑to‑severe, or that may have penetrated periosteum or a joint capsule—administer prophylactic amoxicillin‑clavulanate 875 mg/125 mg orally twice daily for 3–5 days.  23
• Dog‑bite wounds typically harbor an average of five bacterial species; about 60 % contain mixed aerobic‑anaerobic flora, most commonly Pasteurella multocida, Staphylococcus aureus, streptococci, Eikenella corrodens, and various anaerobes. 23

Wound Closure Decisions

• Facial dog‑bite wounds may be closed primarily after thorough irrigation, careful debridement, and initiation of prophylactic antibiotics, ideally by a plastic‑surgery specialist to optimize cosmetic outcome. 23
• Non‑facial wounds should not be closed primarily; instead, approximate the edges loosely with adhesive strips and plan for delayed primary or secondary closure. 23
• Hand wounds generally should be left unsutured because of the heightened risk of septic arthritis, osteomyelitis, and subsequent functional impairment. 23

Tetanus Prophylaxis

• Give tetanus toxoid 0.5 mL intramuscularly if the last tetanus vaccination was more than 10 years ago for clean wounds, more than 5 years ago for contaminated wounds, or if the patient’s vaccination status is unknown. 23
• Use Tdap rather than Td for patients who have not previously received a Tdap dose. 23