Hantavirus risk in Colombo

Hantavirus is a group of viruses carried by rodents that can cause severe respiratory illness (Hantavirus Pulmonary Syndrome) or kidney disease (HFRS) in humans. Infection occurs when people inhale aerosolized virus from urine, droppings, or saliva of infected rats, or through direct contact with contaminated materials. In Colombo, the main risk factors are the high density of house rats (Rattus rattus) in urban areas, inadequate waste management, frequent monsoon flooding that drives rodents indoors, and the common practice of storing food in loosely sealed containers or open pantries. Construction sites and informal settlements also provide shelter and breeding sites for rodents. To reduce risk, follow these practical steps: 1. Inspect homes, warehouses, and workplaces for gaps larger than 6 mm around doors, windows, pipes, and roofs; seal them with cement, metal flashing, or heavy‑duty caulk. 2. Keep all food, including pet food, in rodent‑proof containers with tight lids; clean spills immediately and avoid leaving food out overnight. 3. Dispose of garbage in sturdy, covered bins and empty them regularly; remove piles of debris, wood, or clutter that can serve as nesting sites. 4. Place snap or live traps in areas where droppings or gnaw marks are seen; consider professional pest control if infestation persists. 5. When cleaning rodent‑contaminated areas, wear disposable gloves and a mask, wet the surfaces with a disinfectant (bleach solution) before sweeping, and avoid dry sweeping or vacuuming that can aerosolize the virus.