Content adapted for Philippine healthcare protocols
This article follows DOH Philippines Leptospirosis Management Guidelines and Philippine Pediatric Society (PPS) clinical protocols. All treatment recommendations are for reference only — always consult a licensed Filipino physician for your child's specific case.
What is Leptospirosis (Leptospira)?
Leptospirosis is a bacterial infection caused by Leptospira bacteria — microscopic organisms found in the urine of infected animals, especially rats, dogs, pigs, and cattle. In the Philippines, it is one of the most dangerous diseases associated with typhoon season and flooding.
When floodwater mixes with rat urine (which is everywhere in Metro Manila's drainage systems), the bacteria survive in the water for days to weeks. Children who wade through floodwater — even briefly — can become infected when the bacteria enter through:
Cuts, scrapes, or skin abrasions
Eyes (splashing floodwater)
Nose and mouth (swallowing water)
Prolonged skin contact (softened skin)
Philippine Context
The Philippines reports 3,000–5,000 leptospirosis cases annually, with a case fatality rate of 8–15%. Cases spike dramatically during and after typhoons — particularly in Metro Manila, Central Luzon, and Calabarzon. Children aged 5–14 are among the most affected age groups because they play in floodwater.
Symptoms Timeline: Day by Day
Leptospirosis has two phases. Many mild cases only have Phase 1. Severe cases progress to Phase 2 (Weil's disease), which can be life-threatening.
Incubation Period
Day 0 → Day 2–30 (avg. 5–14 days)- No symptoms yet
- Child appears completely normal
- Bacteria multiplying in bloodstream
- Monitor for 2 weeks after any flood exposure
Phase 1 — Leptospiremic Phase
Day 1–7 of illness- Sudden high fever (38.5–40°C) — abrupt onset
- Severe headache (sakit ng ulo)
- Intense muscle pain — especially calf muscles (binti)
- Red eyes (conjunctival suffusion) — without discharge
- Chills and shivering
- Nausea, vomiting, loss of appetite
- Rash may appear (less common in children)
See a doctor NOW if your child has fever + muscle pain + recent flood exposure. Do not wait.
Phase 2 — Immune Phase (Weil's Disease)
Day 7–14 of illness- Jaundice — yellow skin and eyes (paninilaw)
- Kidney failure — decreased or no urination
- Bleeding — from gums, nose, or in urine/stool
- Severe breathing difficulty
- Confusion or altered consciousness
- Severe abdominal pain
- Heart rhythm problems (rare in children)
EMERGENCY — Go to the ER immediately. This is Weil's disease and requires ICU-level care.
What to Do Immediately After Flood Exposure
Wash immediately with soap and water
Scrub all exposed skin — legs, feet, arms, hands — with soap and water for at least 60 seconds. Pay special attention to cuts and abrasions. Use antiseptic (Betadine or alcohol) on any open wounds.
Rinse eyes and nose
If floodwater splashed into eyes or nose, rinse immediately with clean running water for 15 minutes. Do not rub eyes.
Change all clothing
Remove and bag all clothing that contacted floodwater. Wash separately with detergent. Rubber boots should be disinfected with diluted bleach solution.
Monitor for 14 days
Watch for fever, headache, muscle pain (especially calves), or red eyes for the next 2 weeks. Keep a note of the flood exposure date.
See a doctor at first sign of fever
If your child develops fever within 2 weeks of flood exposure, go to a doctor or hospital IMMEDIATELY. Tell them about the flood exposure — this is critical information for diagnosis.
When to Go to the ER vs. Monitor at Home
Go to ER Immediately
- Yellow skin or eyes (jaundice)
- No urination for 8+ hours
- Bleeding from any site
- Difficulty breathing
- Confusion or unresponsiveness
- Fever above 40°C
- Severe abdominal pain
- Fever + flood exposure in baby under 1 year
See Doctor Within 24 Hours
- Fever (38°C+) within 2 weeks of flood exposure
- Severe muscle pain especially in calves
- Red eyes without discharge
- Persistent headache with fever
- Vomiting that prevents drinking fluids
- Fever lasting more than 3 days
Philippine Hospital Treatment Protocol
Antibiotic Treatment by Age (DOH Philippines Guidelines)
| Age Group | Mild Cases (Outpatient) | Severe Cases (Hospital) |
|---|---|---|
| Under 8 years | Amoxicillin 50mg/kg/day ÷ 3 doses × 7 days | IV Ampicillin 100mg/kg/day ÷ 4 doses |
| 8 years and older | Doxycycline 100mg twice daily × 7 days | IV Penicillin G 1.5 MU every 6 hours |
| Penicillin allergy | Azithromycin (consult doctor for dose) | IV Ceftriaxone (consult doctor) |
⚠ Doxycycline is NOT recommended for children under 8 years due to risk of permanent tooth discoloration. Always follow your doctor's prescription.
Typhoon Season Prevention Guide
Rubber boots and gloves
Always wear rubber boots and gloves when wading in floodwater. Never let children wade barefoot or in open sandals. Knee-high rubber boots are the minimum protection.
Avoid floodwater contact
Keep children indoors during and after flooding. Do not allow children to play in floodwater — even briefly. Floodwater in Metro Manila is heavily contaminated with rat urine.
Cover all wounds
Before any potential flood exposure, cover all cuts, scrapes, and skin abrasions with waterproof bandages. Even small cuts are entry points for Leptospira bacteria.
Rat control at home
Seal all entry points for rats. Use rat traps or bait stations. Rats are the primary reservoir of leptospirosis in Philippine urban areas — reducing rat populations reduces risk.
Safe water during floods
Use only bottled or boiled water for drinking and cooking during and after flooding. Floodwater can contaminate household water supplies.
Vaccinate pets
Vaccinate dogs against leptospirosis annually. Dogs are a major source of infection in Philippine households. Ask your veterinarian about the leptospirosis vaccine.
Tagalog Terms & Common Misconceptions
Key Terms
Myth: "Leptospirosis lang yan, hindi naman malala."
FALSE. Leptospirosis has an 8–15% case fatality rate in the Philippines. Without treatment, it can cause kidney failure, liver failure, and death within days.
Myth: "Okay na ang bata, hindi na kailangan ng antibiotic."
FALSE. Complete the full 7-day antibiotic course even if your child feels better. Stopping early allows bacteria to survive and can lead to relapse.
Myth: "Nakuha sa kapitbahay — nakakahawa."
FALSE. Leptospirosis does NOT spread person-to-person. It only spreads through contact with infected animal urine or contaminated water.
Frequently Asked Questions
Medical Disclaimer
This article is for general health information only and does not constitute medical advice. Always consult a licensed Filipino physician (PRC-registered) for diagnosis and treatment of leptospirosis. In emergencies, call 911 or go to the nearest hospital immediately. KidSafe PH content follows DOH Philippines and Philippine Pediatric Society guidelines.