nosocomiali

Nosocomiali, or nosocomial infections, are infections acquired in healthcare settings such as hospitals or clinics that were not present and not incubating at the time of a patient’s admission. In many definitions, a hospital-acquired infection is diagnosed when it occurs 48 hours or more after admission or within 30 days after a surgical procedure. The term is commonly used to describe infections contracted in a hospital or other care facility.

Common types include surgical site infections, catheter-associated urinary tract infections, pneumonia (including ventilator-associated pneumonia), and bloodstream infections. These infections are often linked to invasive devices and procedures, as well as to the patient’s underlying illness and prior antibiotic exposure.

Transmission occurs primarily via the hands of healthcare workers, contaminated equipment, and contaminated surfaces. Risk factors include prolonged hospitalization, invasive devices, immunosuppression, advanced age, and prior broad-spectrum antibiotic use. Organisms frequently involved include MRSA, ESBL-producing Enterobacterales, Pseudomonas aeruginosa, Klebsiella species, and Clostridioides difficile.

Prevention focuses on interrupting transmission and reducing risk: strict hand hygiene, aseptic technique, proper sterilization of instruments, careful management of invasive devices, environmental cleaning, isolation when indicated, and antimicrobial stewardship. Surveillance and reporting help monitor rates and guide interventions.

Nosocomial infections impose a substantial clinical and economic burden, increasing length of stay, morbidity, and mortality. Reducing rates requires a system-wide emphasis on infection prevention in healthcare facilities.