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People wade through a flooded area in Malabon, metro Manila on July 24, 2025.
AFP / Jam Sta Rosa
MANILA, Philippines — The Department of Health (DOH) said it is closely monitoring a possible increase in leptospirosis cases following days of continuous rainfall brought by a series of cyclones enhanced by the southwest monsoon or habagat.
In an advisory on Saturday, August 2, the Department of Health reported that a total of 3,037 leptospirosis cases had been recorded nationwide from January 1 to July 19.
Over a third of these infections or 1,114 cases were logged between June 8 and July 19, shortly after state weather bureau PAGASA officially declared the start of the rainy season on June 2.
From July 13 to 31 alone, DOH hospitals reported 569 leptospirosis cases, raising concerns of a further surge as more areas experience flooding.
Leptospirosis, a potentially fatal bacterial infection, is commonly contracted through contact with floodwaters contaminated by animal urine, such as rodents.
The health department reminded the public to seek immediate medical attention if they waded through floodwater, even if symptoms have yet to appear.
"Nakamamatay ang Leptospirosis! Umaskyon agad, lalo na kung lumusong sa baha kamakailan," the DOH said in a public advisory.
The agency issued the following precautions to prevent infection:
- Wash the body thoroughly after wading through floodwater
- Monitor yourself for symptoms such as fever, muscle pain or jaundice
- Seek medical advice even if asymptomatic, especially after flood exposure
- Only take prescribed prophylactic medication from licensed health professionals
Health officials warned that self-medication without proper guidance can lead to complications.
Symptoms of leptospirosis typically appear within 5 to 14 days and may include high fever, chills, vomiting, diarrhea and muscle pain, often confused with flu or dengue.
Heavy rains brought by the enhanced southwest monsoon and tropical cyclones Crising (Wipha), Dante (Francisco) and Emong (Co-May) have left at least 34 people dead, displaced thousands, forced class and work suspensions, and placed several provinces, cities and municipalities under a state of calamity.
