Published: 12:01 AM, 25 October 2026 Last Update: 12:00 AM, 25 October 2026
The Unseen Side of Medical Progress: Infection Risks in Endoscopy
Nazmun Nahar Nipa
Medical technology keeps improving. With better tools come new concerns. One serious risk is infection. It can happen when instruments are not cleaned properly. This is a problem even when the tools are designed to be reused. The tools can carry germs from one patient to another, putting patients at risk.
Modern medicine lets doctors look inside the body in detail. A major operation once required an incision. Now, a flexible tool with a camera can do the job. This tool is called an endoscope. It helps doctors examine organs such as the stomach and intestines. It also helps them collect tissue samples and perform treatments. Some types of endoscopes are used to examine the lungs, bladder, and other areas. Endoscopy is widely used and is generally safe, but it carries a hidden danger.
The danger comes after the tool is used. When an instrument comes into contact with mucus, bodily fluids, or tissue, it can carry germs. These germs can remain on the tool if it is not cleaned properly. Cleaning involves more than simply wiping it down. It requires several careful steps. First, the tool is cleaned. Then, it undergoes high-level disinfection or sterilization, depending on the type of instrument and its intended use. After that, it is inspected for damage, dried, and stored properly.
If one step is skipped or performed incorrectly, germs can survive. The tool can then pass those germs to another patient. This is especially dangerous because the tool may look clean. Germs can hide in small components or inside narrow channels. That is why visual cleanliness is not enough. The instrument must be properly reprocessed throughout, both inside and out.
A good example is the duodenoscope. This tool is used in a procedure called endoscopic retrograde cholangiopancreatography (ERCP). It helps doctors examine the bile and pancreatic ducts and treat problems in those areas. The duodenoscope has small, complex components that make it difficult to clean. These parts can retain germs even after cleaning. The US Food and Drug Administration (FDA) has reported infections associated with reprocessed duodenoscopes, including infections caused by antibiotic-resistant bacteria. Some cases occurred even when hospitals reported following recommended cleaning procedures.
This reveals a limitation: safety cannot depend on cleaning protocols alone. If a tool is difficult to clean because of its design, following cleaning procedures may not always be sufficient to eliminate the risk. That is why safety must be considered during the design phase. Engineers and manufacturers should develop tools that are easier to clean and consider disposable alternatives when appropriate. Once a problem appears, addressing it may be difficult. The lesson is clear: safety must be built in from the start.
Another problem is biofilm formation. Some germs attach to surfaces and grow into communities. These communities are surrounded by a protective layer called a biofilm matrix. Biofilms can develop on damaged surfaces or inside instrument channels, making microorganisms more difficult to remove. They can contribute to persistent contamination. Biofilms are not always the cause of infection, but they can make contamination more difficult to control. Their effects depend on the instrument, the microorganisms involved, and the surrounding environment.
The risk may increase when biofilms are associated with other problems, such as damaged surfaces, inadequate cleaning, residual organic material, or improper drying. These conditions can help microorganisms persist and may contribute to biofilm formation. This means that effective disinfection must be supported by thorough cleaning, appropriate instrument design, and strict adherence to established procedures. Every step must be performed correctly.
When contaminated instruments spread germs that resist antibiotics, the problem becomes more serious. Bacteria such as carbapenem-resistant Enterobacterales (CRE) can cause difficult-to-treat infections. These infections can prolonged hospital stays and require specialized treatment. In severe cases, they can be life-threatening.
Transmission does not always result in illness. Some patients may become colonized, meaning that resistant germs live in or on their bodies without causing symptoms. These people may not feel sick, but they may be able to spread the germs to others. They may also develop an infection later. This makes infection prevention particularly important in healthcare settings.
This demonstrates how instrument reprocessing, infection prevention, and antimicrobial resistance (AMR) are linked. Antimicrobial resistance is a major public health concern. In this context, the focus is on how contaminated instruments can transmit resistant germs from one patient to another. Preventing this transmission is one part of the broader effort to combat antimicrobial resistance.
The Wider Lesson: Technology Must Be Paired with Safety
Endoscopy highlights a challenge in healthcare. New tools can improve disease diagnosis and treatment, but they can also introduce new challenges in infection control. History shows that sophisticated technology does not automatically guarantee safety. A tool may perform its intended function well while still being difficult to clean, maintain, or reuse safely.
The same concerns apply to other reusable medical instruments and invasive procedures. We should not stop pursuing medical innovation. Instead, we must pair it with effective infection prevention, appropriate oversight, and continuous monitoring for potential risks. This responsibility applies to all healthcare systems, regardless of their available resources.
For healthcare systems with limited resources, these tasks can be particularly challenging. Training staff, maintaining instruments, ensuring a reliable supply of materials, providing appropriate reprocessing facilities, and monitoring infections all require investment. These activities must be recognized as essential components of healthcare, not merely as additional costs.
Protecting Patients Requires More Than Disinfection
Preventing endoscopy-associated infections requires a comprehensive plan. Hospitals must follow validated, manufacturer-specific reprocessing instructions. Staff must understand and perform every step correctly. Instruments must be inspected for damage, dried, and stored appropriately. They should also be tracked so that potential sources can be identified if an infection occurs.
Healthcare teams should investigate suspected clusters of infections, work with infection-prevention specialists, and report suspected outbreaks to the appropriate authorities. This helps identify problems and prevent further transmission.
Regulators and manufacturers also have important responsibilities. Manufacturers should design instruments that are easier to clean and consider disposable alternatives when appropriate. Regulators and health authorities should evaluate safety evidence, update guidance when necessary, and support the implementation of recommended practices.
The key is to make infection prevention an integral part of routine healthcare. A safety protocol is effective only when it is implemented, monitored, and continually improved. Without proper implementation, even well-designed rules may fail to protect patients.
A Question of Trust in Modern Medicine
Patients visit hospitals expecting medical procedures to improve their health. They do not expect to face preventable risks. Maintaining their trust requires more than skilled doctors and advanced equipment. It also requires attention to the less visible processes that make healthcare safe and ensure that every step is performed correctly.
Endoscopy remains a valuable tool for diagnosing and treating disease. The risks associated with certain instruments do not mean that the procedure should be abandoned. Instead, they demonstrate that safety standards must evolve alongside technological advances.
The challenge for modern healthcare has two parts. First, it must develop tools that diagnose and treat diseases more effectively. Second, it must ensure that the systems supporting these tools minimize the risk of harm.
Medical progress must be judged not only by what new technology can achieve but also by how effectively it protects the patients who depend on it.
Nazmun Nahar Nipa is a Master’s
thesis student in Department
of Microbiology, Jahangirnagar University.
