20Nov

What are nosocomial infections?

November 20, 2025 equimed 221

Nosocomial infections, also known as hospital-acquired infections or HAIs (Healthcare Associated Infections), are those infections that a patient contracts during their stay in a healthcare facility and which were not present or incubating at the time of admission. They represent one of the greatest challenges for healthcare systems worldwide due to their clinical, economic and organizational impact.

Although often associated with inpatients, these infections can also affect healthcare staff, outpatient workers and even visitors. That is why their control is a top priority in hospitals, clinics, operating rooms, ICUs and any healthcare environment.

In this article you will find a complete and updated explanation of what they are, how they are produced, which are the most frequent types, which microorganisms are involved, how they can be prevented and which strategies are proving to be most effective in reducing them.

Why are nosocomial infections so important?

Nosocomial infections not only pose a health risk to patients; they also represent a challenge for healthcare facilities for several reasons:

1. They increase morbidity and mortality

Hospitalized patients often have weakened immune systems, are undergoing invasive procedures or complex treatments. This makes them more vulnerable.

2. They lengthen hospital stay

A hospital-acquired infection usually requires more days of hospitalization, more diagnostic tests and new treatments.

3. They increase healthcare costs

The economic impact is enormous. In countries such as the United States, it is estimated that between 28,000 and 45,000 million dollars a year are associated with these infections. In Europe the figure is also very high and continues to grow due to antimicrobial resistance.

4. They affect patient safety and quality of care

Reducing nosocomial infections is one of the pillars for improving the patient experience and increasing the efficiency of the healthcare system.

Causes of nosocomial infections

Hospital-acquired infections can occur for a variety of reasons. The most common include:

Invasive procedures

Central catheters, urinary catheters, intubation, mechanical ventilation or surgeries.

Contaminated surfaces, medical equipment and environments

Their cleaning and disinfection must be rigorous and constant.

Lack of hand hygiene

It is estimated that up to 40% of nosocomial infections are related to insufficient hand washing.

Antimicrobial resistance

Incorrect use of antibiotics favors the emergence of resistant bacteria.

Patient density and hospital saturation

The higher the occupancy, the more difficult it is to maintain strict control measures.

Most common types of nosocomial infections

Hospital-acquired infections can be classified in different ways, but the most common are:

1. Catheter-associated urinary tract infections (CAUTI)

These are usually the most frequent. They are related to prolonged use of urinary catheters and can cause serious complications if they ascend to the kidneys.

2. Respiratory infections and ventilator-associated pneumonias

They appear mainly in Intensive Care Units (ICU) in mechanically ventilated patients.

3. Surgical infections

Occur at the incision site after an operation. They can be superficial or deep.

4. Catheter-associated bacteremia and sepsis

Central venous catheters are an important entry point for microorganisms if not handled properly.

5. Gastroenteritis and other gastrointestinal infections

Caused by viruses, bacteria or parasites present on contaminated surfaces, food or hands.

6. Infections due to contact with contaminated surfaces

The hospital environment (tables, railings, medical equipment, surgical lights, etc.) can harbor resistant microorganisms if strict hygiene is not maintained.

Most frequent microorganisms in nosocomial infections

Depending on the affected area, the most common pathogens are:

Bacteria

Staphylococcus aureus (including MRSA)
Escherichia coli
Pseudomonas aeruginosa
Klebsiella pneumoniae
Enterococcus faecalis

Viruses

Respiratory viruses (influenza, SARS-CoV-2)
Norovirus
Adenovirus

Fungi

Candida albicans
Aspergillus

Many of these microorganisms present resistance to antibiotics, which complicates treatment.

How can nosocomial infections be prevented?

Prevention is the most effective tool to reduce the incidence of HAIs. The World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) recommend a set of key strategies.

The following is an expanded and updated summary of the most effective measures:

Hand Hygiene

The simplest and most effective measure. It should be done at key times:

Before contact with a patient
Before performing procedures
After exposure to fluids
After contact with patients or contaminated surfaces

Correct use of gloves and sterile equipment

Gloves are not a substitute for hand washing.
All invasive material must be sterile and handled according to protocol.

Cleaning and disinfection of the environment

Includes:

High contact surfaces
Medical equipment
Operating rooms
ICU
Rooms and bathrooms

The design of the environment has a great influence: smooth surfaces, closed enclosures, cable management, equipment not resting on the floor and non-contact light points reduce the risk of cross-contamination.

Isolation strategies

Patients with highly contagious diseases should be placed in specific rooms with special rules.

Rigorous sterilization of instruments

Sterilization should be constant and monitored with chemical and biological indicators.

Rational use of antibiotics

To combat antimicrobial resistance, it is essential that antibiotics are administered only when indicated and in the correct dosage.

Vaccination and protection of healthcare personnel

Personnel should be protected to avoid infecting and being infected:

Recommended vaccinations
Protective clothing (gowns, gloves, caps, goggles, masks)
Continuous training

Adequate nutrition and prophylaxis in vulnerable patients

Patients with low defenses are more at risk. Adequate nutrition and antimicrobial prophylaxis in at-risk surgeries reduce complications.

Advanced surveillance and monitoring systems

A good surveillance program includes:

Outbreak monitoring
Registration of resistant strains
Internal hygiene audits
Intelligent alarms to reduce adverse events

The most advanced hospitals use real-time data, sensors, predictive analytics and IoT technology.

Treatment of nosocomial infections

Treatment depends on the type of infection, but generally involves:

Targeted antimicrobials

Based on cultures, antibiograms and clinical protocols.

Removal of contaminated devices

Probes, catheters or tubing should be replaced as soon as possible.

Life support

Hydration, pain control, respiratory or hemodynamic support if necessary.

Preventive measures for close contacts

In highly contagious viral or bacterial infections.

An early approach is key to avoid complications such as sepsis, multiorgan failure or readmissions.

Economic and organizational impact of nosocomial infections.

Hospital-acquired infections do not only affect healthcare. They also have a major impact on

Hospital costs

More days of hospitalization, more drugs, more diagnostic tests.

Resource management

Busy beds, overcrowding in ICU and delays in surgeries.

Legal demands

Patient safety is a legal and ethical requirement. A poorly managed outbreak can trigger claims.

That’s why investing in safe, well-designed and easy-to-clean work environments is not an expense, but a long-term savings.

Nosocomial infections remain one of the biggest challenges in modern healthcare. Preventing them depends on a combination of best practices, advanced technology, continuous education and a comprehensive approach to patient safety.

Reducing them not only improves clinical outcomes, but also reduces costs, increases staff satisfaction and contributes to a more efficient and sustainable healthcare system.

Implementing strict hygiene measures, optimizing space design, using easy-to-clean equipment and applying advanced monitoring programs are essential steps towards safer hospitals

06Nov

Primary Health Care: the gateway to the health system

November 6, 2025 equimed 223

Primary Health Care (PHC) is the first level of contact between people and the health system. It represents the basis of all medical care, offering comprehensive, close and continuous care to individuals, families and communities.

Its objective is not limited to curing diseases, but seeks to prevent, promote and rehabilitate health at all stages of life. WHO, based on the Declaration of Alma-Ata (1978) (2), defines PHC as ” essential health care accessible to all individuals and families in the community through means acceptable to them, with their full participation and at a cost affordable to the community and the country. It is the backbone of the country’s health system and forms an integral part of the overall socioeconomic development of the community.”

What is Primary Health Care?

Primary Health Care (PHC) is the first level of care within the health system and the usual point of entry for citizens when they need medical attention. It offers comprehensive, accessible and continuous care, ranging from prevention and early diagnosis to treatment and rehabilitation of the most common diseases.

In Spain, this model was consolidated in the 1980s with the creation of Health Centers, which replaced the old outpatient clinics. Since then, primary care has become the gateway to the National Health System, as recognized by the General Health Law 14/1986.

This level of care is composed of family physicians, pediatricians and nursing staff, who work in a coordinated manner to care for people’s health throughout all stages of life. Its approach is global and close, as it considers not only the disease, but also the patient’s family, social and work environment.

In addition to attending scheduled consultations and minor emergencies, Primary Care plays an essential role in the promotion of healthy habits and health education. Thanks to its preventive and community-based nature, it contributes to the maintenance of general wellbeing and the efficient use of health system resources.

Main characteristics of Primary Health Care

Primary Health Care (PHC) has a series of fundamental features that make it the basic pillar of the health system. Its approach seeks to offer close, equitable and continuous care, focused on both the individual and the community. Among its most relevant characteristics are the following:

1. Universal accessibility

Primary care must be accessible to the entire population, ensuring that anyone, regardless of their economic level, age or place of residence, can receive health care quickly and efficiently.

2. Comprehensive care

At this level, all dimensions of health are addressed: from prevention and diagnosis to treatment and rehabilitation. Comprehensive care involves caring for the whole patient, not just treating the symptoms.

3. Continuity of care

The relationship between the patient and his or her healthcare team is maintained over time, allowing personalized follow-up and consistent care for different health problems. This strengthens trust and improves clinical outcomes.

4. Coordination between levels of care

Primary care acts as the backbone of the health system. Its professionals coordinate care with hospitals, specialized services and social resources, avoiding duplication and improving the effectiveness of treatment.

5. Community and social approach

PHC is not limited to the individual, but considers the social, cultural and economic context of the community. Thus, it promotes actions that favor collective health and citizen participation in the care of their environment.

6. Health promotion and prevention

Beyond curing diseases, Primary Care is oriented towards preventing health problems and promoting healthy lifestyles. Educational campaigns, regular check-ups and vaccination programs are an essential part of this work.

Health Centers: the backbone of Primary Care

Health Centers are the physical and organizational core of Primary Health Care. Each center covers a Basic Health Zone, defined according to the demographic, geographic and social characteristics of its population. In these areas, citizens receive medical, nursing, oral and mental health care and, in many cases, social and community services that contribute to the integral wellbeing of the population.

Beyond being a place for consultation, health centers are real meeting points between the community and health professionals. They promote prevention, health education and personalized care, with the aim of improving people’s quality of life.

Primary care teams – made up of family doctors, pediatricians, nurses and administrative staff – work in coordination with hospitals and specialized services, guaranteeing continuous and efficient care that avoids duplication and improves clinical outcomes.

Prevention and health promotion

One of the most valuable missions of primary care is to prevent diseases before they develop. To this end, vaccination programs, regular check-ups, early detection of chronic diseases and health education activities aimed at the entire community are implemented.

Health promotion seeks to strengthen healthy habits and reduce risk factors associated with common diseases. Through talks, campaigns and professional support, the population is helped to adopt more active and balanced lifestyles.

Primary care not only cures, but also teaches how to care for and maintain health.

The importance of strengthening primary care

A commitment to primary care is a commitment to the sustainability of the healthcare system. A solid primary level allows earlier diagnoses, fewer unnecessary hospitalizations and greater satisfaction for both the patient and the healthcare professional.

In addition, it fosters a close, human and trusting relationship between the citizen and his or her healthcare team, which is essential to achieve quality care with continuity over time.

Primary Health Care is much more than the first gateway to the health system: it is the engine that drives the health of the community. Its preventive, comprehensive and humanized approach makes it the pillar on which any society that aspires to be healthier, more equitable and informed must be based.