Healthcare-Associated Infection
An infection acquired while receiving medical care
Quick Facts
- Type: Infection acquired during care
- Common types: Surgical site, urinary, bloodstream, pneumonia
- Often linked to: Catheters, IV lines, ventilators, surgery
- Prevention: Hand hygiene, device care, sterile technique
Overview
A healthcare-associated infection is an infection that a person develops while receiving medical care that was not present when they arrived. These infections can occur in hospitals, surgery centers, nursing homes, dialysis units, and clinics. They are sometimes called hospital-acquired or nosocomial infections.
Healthcare-associated infections often happen because care can involve breaks in the body's natural defenses, such as surgical wounds, catheters, intravenous lines, and breathing tubes. These provide pathways for germs to enter the body. While not every infection can be prevented, many can be reduced through careful infection-control practices. Understanding the common types and warning signs helps patients and families take part in staying safe.
Symptoms
Symptoms depend on the type and site of infection. General and specific signs include:
- Surgical site infection: Redness, warmth, swelling, pain, or drainage from a wound.
- Urinary tract infection: Burning with urination, frequent urination, or cloudy urine, often linked to a catheter.
- Bloodstream infection: Fever, chills, rapid heartbeat, and feeling very unwell, often related to an IV line.
- Pneumonia: Cough, shortness of breath, and fever, sometimes in people on a ventilator.
Fever, increasing pain, spreading redness, or feeling suddenly very unwell during or after care should be reported promptly, as serious infection can progress quickly.
Causes
Healthcare-associated infections are caused by bacteria, viruses, or fungi that reach a vulnerable part of the body. Common routes include:
- Medical devices: Urinary catheters, intravenous lines, and breathing tubes can carry germs past the body's defenses.
- Surgery: Any incision creates an entry point for bacteria.
- Person-to-person spread: Germs can pass via hands, equipment, or surfaces.
- Antibiotic-resistant organisms: Some germs are harder to treat and can spread in care settings.
Patients who are very ill or have weakened defenses are more susceptible.
Risk Factors
- Having a urinary catheter, central IV line, or breathing tube
- Recent or ongoing surgery
- A long hospital stay or stay in intensive care
- A weakened immune system or serious underlying illness
- Older age or very young age
- Recent use of broad antibiotics, which can disrupt protective bacteria
Diagnosis
Doctors diagnose these infections by combining symptoms with tests to find the responsible germ:
- Cultures: Samples of blood, urine, wound fluid, or sputum are grown to identify the organism and the antibiotics it responds to.
- Blood tests: Markers of infection and inflammation.
- Imaging: X-rays or scans to locate infections such as pneumonia or a deep abscess.
- Device evaluation: Checking catheters and lines as possible sources.
Identifying the exact organism guides effective treatment, especially when resistant bacteria are involved.
Treatment
Treatment depends on the type of infection and the organism. Common steps include:
- Antibiotics or antifungals: Chosen based on the identified germ and its resistance pattern.
- Removing or replacing devices: An infected catheter or line is often taken out.
- Source control: Draining an abscess or cleaning a wound when needed.
- Supportive care: Fluids, oxygen, and monitoring, with intensive care for severe infections such as sepsis.
Prompt, targeted treatment improves outcomes, and finishing the full course of prescribed medicine helps prevent resistance and relapse.
Prevention
Prevention is a shared effort between healthcare teams and patients:
- Thorough hand hygiene by everyone before and after contact
- Removing catheters and lines as soon as they are no longer needed
- Sterile technique during procedures and surgery
- Keeping wounds clean and following care instructions
- Patients and visitors can ask staff to clean their hands and can speak up about wound or device concerns
- Using antibiotics only when needed to limit resistant germs
When to See a Doctor
Tell your care team or doctor right away if, during or after medical care, you develop:
- Fever or chills
- Redness, swelling, increasing pain, or drainage from a wound or device site
- Burning or pain with urination, especially with a catheter
- New cough or shortness of breath
Seek emergency care for high fever, confusion, rapid heartbeat, or feeling suddenly very unwell, which can signal a spreading infection.
Frequently Asked Questions
What is a healthcare-associated infection?
It is an infection a person catches while receiving medical care, such as in a hospital, that was not present when they arrived. Common types include surgical wound infections, urinary tract infections from catheters, bloodstream infections from IV lines, and pneumonia. Many can be reduced through careful infection-control practices.
How do these infections happen?
Medical care can create openings in the body's defenses, such as surgical incisions, catheters, IV lines, and breathing tubes, which give germs a way in. Bacteria can also spread by hands, equipment, or surfaces. People who are very ill or have weakened immune systems are more vulnerable.
Can I do anything to prevent a healthcare-associated infection?
Yes. You can ask healthcare workers and visitors to clean their hands, keep wounds clean as instructed, and speak up if a device site looks red or sore. Asking whether a catheter or line is still needed also helps, since removing devices promptly lowers risk. These steps complement the precautions the care team takes.
What are antibiotic-resistant healthcare infections?
Some germs in care settings have become resistant to common antibiotics, making them harder to treat. Doctors use cultures to identify the organism and select an effective medicine. Using antibiotics only when truly needed and finishing prescribed courses helps limit resistance.
When should I worry about an infection after a hospital stay?
Contact your care team if you develop fever, chills, spreading redness or drainage from a wound, burning with urination, or new cough and breathlessness. Seek emergency care for high fever, confusion, a racing heart, or feeling suddenly very unwell, as these can signal a serious, spreading infection.
References
- Centers for Disease Control and Prevention (CDC). Healthcare-Associated Infections.
- World Health Organization (WHO). Health care-associated infections.
- Agency for Healthcare Research and Quality (AHRQ).
- MedlinePlus, U.S. National Library of Medicine.