What are the current RITM and DOH guidelines for managing animal bites in the Philippines, including wound care, rabies post‑exposure prophylaxis, tetanus prophylaxis, and antibiotic therapy?

Animal Bite Management Guidelines in the Philippines (RITM/DOH)

For animal bites in the Philippines, immediately perform thorough wound washing with soap and water or povidone-iodine solution, initiate rabies post-exposure prophylaxis (PEP) with both rabies immunoglobulin and vaccine for previously unvaccinated patients with Category II or III exposures, assess tetanus vaccination status, and consider antibiotic prophylaxis with amoxicillin-clavulanate for high-risk wounds.

Immediate Wound Care

The first and most critical step is aggressive wound management, which alone significantly reduces rabies transmission risk 1:

• Irrigate immediately with water or dilute povidone-iodine solution
• Use gentle technique to avoid tissue damage
• Avoid suturing when possible - primary closure should be delayed for most bite wounds 1
• This step is non-negotiable regardless of rabies risk, as thorough cleansing markedly reduces infection likelihood

Rabies Post-Exposure Prophylaxis (PEP)

For Previously Unvaccinated Patients

The standard RITM protocol uses purified equine rabies immunoglobulin (pERIG) combined with cell culture vaccine, which has demonstrated excellent efficacy with 143 of 151 laboratory-confirmed rabies exposures surviving in Philippine data 2:

Rabies Immunoglobulin Administration:

• Dose: 20 IU/kg body weight (applies to all ages including children) 1
• Infiltrate the full dose around and into the wound when anatomically feasible
• Inject any remaining volume intramuscularly at a site distant from vaccine administration
• Give only once at day 0 (can be given up to day 7 if initially missed) 1
• Never administer in the same syringe or anatomical site as the first vaccine dose 1

Vaccine Schedule:

• 5 doses administered on days 0,3,7,14, and 28 for unvaccinated patients 1
• Note: While updated US guidelines recommend 4 doses for immunocompetent patients 3, the Philippines follows the traditional 5-dose regimen which remains highly effective 2
• Administer intramuscularly in the deltoid (never in the gluteal region)

For Previously Vaccinated Patients

• 2 doses only on days 0 and 3 3
• No immunoglobulin needed - it may actually suppress the anamnestic response 3
• This applies to anyone who completed a full pre-exposure or post-exposure vaccination series with cell culture vaccine

Animal Observation Protocol

For healthy dogs, cats, or ferrets that bite:

• Confine and observe the animal for 10 days 1, 4
• Do not vaccinate the animal during observation period
• If the animal remains healthy for 10 days, PEP can be discontinued
• If the animal develops signs of rabies or dies, euthanize immediately and submit head for testing; complete the full PEP course 1, 4

For stray or unwanted animals:

• Either observe for 10 days OR euthanize immediately and test 1

For wild animals or bats:

• Euthanize and test immediately; do not observe 4
• Initiate PEP immediately while awaiting results

Tetanus Prophylaxis

Assess tetanus vaccination status for every bite wound 1:

• If last tetanus booster was >10 years ago: give tetanus toxoid booster
• If last booster was >5 years ago AND wound is contaminated/severe: give booster
• If vaccination history is unknown or incomplete: initiate or complete primary series
• Recent Philippine data shows 81.9% seropositivity in adults, with declining levels with age, emphasizing the importance of boosters every 10 years 5

Antibiotic Prophylaxis

Amoxicillin-clavulanate 875/125 mg twice daily is the first-line antibiotic for animal bites 6:

Indications for prophylactic antibiotics (3-5 days):

• Immunocompromised patients
• Asplenic patients
• Advanced liver disease
• Pre-existing or resultant edema of affected area
• Moderate to severe injuries, especially to hand or face
• Injuries potentially penetrating periosteum or joint capsule
• Wounds presenting >12-24 hours after injury 6

Alternative regimens if amoxicillin-clavulanate unavailable:

• Doxycycline 100 mg twice daily (excellent against Pasteurella multocida)
• Avoid clindamycin monotherapy - misses Pasteurella 6

Common pitfall: Not all bite wounds require antibiotics. Low-risk wounds (superficial, <12 hours old, not on hand/face, immunocompetent patient) may only need wound care and observation.

Risk Stratification

Category II exposures (nibbling, minor scratches without bleeding):

• Wound washing
• Vaccine only (no immunoglobulin needed)

Category III exposures (single/multiple transdermal bites, contamination of mucous membranes with saliva):

• Wound washing
• Both immunoglobulin AND vaccine required 2

Operational Considerations in the Philippines

The Philippine ABTC network provides PEP to over 1 million patients annually through 513 centers 7:

• Patient awareness of nearest ABTC is generally >80%, but only 44.9% of bite victims seek proper medical treatment 8
• Out-of-pocket expenses range from $5.53 to $37.83 per patient, primarily dependent on whether government supplies are available 8
• 78% of patients complete the recommended course; main barriers are lack of time and insufficient funds 8
• 85% of patients presenting for PEP were not truly exposed to rabies based on dog observation data, highlighting the need for better public education 8

Critical Pitfalls to Avoid

1. Never delay PEP while waiting for animal observation results - initiate immediately for Category III exposures
2. Never give immunoglobulin after day 7 - it can suppress active antibody production 1
3. Never exceed the recommended immunoglobulin dose (20 IU/kg) - excess suppresses vaccine response 1
4. Never suture bite wounds primarily unless absolutely necessary for cosmetic/functional reasons 1
5. Never assume traditional remedies are adequate - they remain common in the Philippines but are ineffective 8, 9

Documentation

Ensure proper documentation using NASPHV Form #50 or #51 (Rabies Vaccination Certificate) for tracking and follow-up 4.