Rats are probably the last thing anyone expects to see inside a hospital.
Yet they can find their way into even well-maintained healthcare facilities, especially during the rainy season. When heavy rain and flooding destroy their nests, forcing them to look for warmer shelters.
Most infection control programs aren’t built to catch this. So, how do you protect your hospital?
Hospitals Have Strict Protocols, But They’re Still Vulnerable
Philippine hospitals need to follow strict protocols because they work under the DOH’s National Standards for Infection Prevention and Control. These standards mandate surveillance programs, hygiene compliance, and documented pest management as part of each facility’s infection control framework.
The problem is that a clean hospital is not necessarily a rodent-resistant hospital. Good sanitation helps remove food and other things that attract rodents, but it cannot close a gap around a structural defects.
Rodents don’t need a huge and obvious gap to enter a hospital building. A gap of 20mm is big enough for a rat to squeeze through. That’s roughly the diameter of a thumb.
The Building’s Infrastructure Is Often the Problem
Based on ENTECH’s experience working with healthcare facilities, many rodent problems actually begin outside the hospital.
Rats can come from neighboring properties, drainage systems, sewer networks, and other areas around the building. Roof Rats are particularly good in elevated spaces. They can move along roofs, pipes, cables, ceiling voids, and other parts of a building that people rarely think of as rat pathways.
By the time rats are detected inside a hospital, it has almost certainly been using a ceiling void as a nest and a highway for weeks.
Common Entry Points for Rats in Hospitals
Utility lines are the most common way rats get in where utility lines pass through walls, ceilings, and floors, creating routes into ceiling voids.
Loading docks are vulnerable because they connect directly to the outside and can give rats access to food, warmth, and shelter. During heavy rain, these entry points become even more important as rats leave flooded drainage systems and other disturbed nesting areas.
Aging infrastructure is also a factor. Cracked concrete, damaged foundations, worn door seals, and gaps around old installations can create enough space for a rat to squeeze through and establish a route inside the facility.
These weaknesses are easy to miss because they are structural rather than sanitation issues.
Why the Rainy Season Can Increase Rat Activity
During heavy floods, we often associate it with leptospirosis, but here’s another rodent-related problem.
When floodwaters rise through sewers, the rat colonies living in those networks lose their habitat. Rats are strong swimmers, and when they lose their homes, they move to drier and safer shelters.
A hospital is one of the most attractive targets available. It runs 24 hours a day, offering continuous food and warmth.
In the rainy season from June through November, your hospital is riskier. The external pressure multiplies. This is the window where structural weakness becomes a serious problem.
An Unprotected Hospital is a Significant Infection Risk
A rat infestation is a problem that can affect the health of thousands of patients who are already immunocompromised.
Rodents in a clinical environment are a direct vector for healthcare-associated infections (HAIs).
For example, leptospirosis is a common threat. The DOH recorded 2,177 cases of leptospirosis in the first half of 2026, and this number will rise during the rainy months ahead. If your hospital isn’t protected, you may risk the lives of numerous patients.
Hantavirus is another infection that could come from rodent excretions, and it can also affect a person if they inhale particles from dried rodent waste. Although there have been no confirmed cases in the Philippines this year, there have been cases from past years.
The World Health Organization stresses the importance of investing in infection control in healthcare. How can you maximize your hospital’s protection against HAIs?
Integrated Pest Management is the most thorough solution.
What IPM Actually Looks Like in a Hospital
For high-risk environments like hospitals, you need to be proactive. Integrated Pest Management can help with this, as it helps address the specific vulnerabilities of your facility and meet the standards set by the DOH.
ENTECH’s risk-based IPM approach is built on targeted treatments and strict control of sanitation and chemical use. This way, we’ll get rid of rodents while protecting your patients, visitors, and staff.
We also don’t apply rodenticides broadly across a facility. Our technicians only position them in key areas, especially those with high rodent activity. We keep them away from patient wards and clinical workspaces.
Our professionals also assess your building for entry points like unsealed pipe penetrations, worn drain covers, compromised door seals, and gaps at loading docks. Then, we provide specific, actionable recommendations for sealing them.
Ongoing monitoring then closes the loop. Our technicians can detect problems early by placing bait stations and monitoring units at key risk points. A station showing movement near a ceiling void is an issue that we can address during a service visit, not a crisis that a patient or nurse discovers at 2 AM.
Is Your Hospital Truly Protected Against Rodent Infestations?
Hospitals are designed to keep infection out, but cleanliness can only go so far. Pest control professionals can help identify these issues before they become active threats.
If you want to understand where your facility’s structural vulnerabilities are, schedule an assessment with ENTECH today.
FAQs
Can rats get into a hospital even if it’s cleaned regularly?
Yes. While cleanliness controls food sources and surface contamination, it does nothing to seal the structural gaps rats use to enter a building. Rats are drawn to warmth, shelter, and water, all of which exist in even the most well-maintained hospital facilities.
What’s the smallest gap a rat can fit through?
An adult rat can squeeze through a horizontal gap as narrow as 20 millimeters. That’s smaller than most unsealed pipe penetrations, worn drain covers, or gaps at the base of a loading dock door.
Why do rat problems increase in hospitals after flooding?
Floodwaters can drive rats from their underground homes and force them to seek higher, drier ground. Hospitals offer constant warmth and food waste, making them attractive to rats.
Is rodent control part of DOH infection control requirements?
Yes. DOH Administrative Order No. 2022-0051 requires all public and private health facilities to establish, implement, and maintain an Infection Prevention and Control Program that meets minimum requirements across core IPC components.