Introduction:

hospital-acquired infections stand as a significant public health problem of great economic and social impact and constitute a challenge for the health care institutions.

Objective:

to determine the incidence of intrinsic and extrinsic risk factors on the triggering for hospital-acquired infections at Leon Cuervo Rubio Clinical Surgical Teaching Hospital in Pinar del Rio during 2017.

Methods:

descriptive, longitudinal and prospective research in a group of patients who suffered from hospital-acquired infections (N=361). The sample comprised 357 patients presenting these infections once the exclusion criteria were applied. The controls were randomly chosen from a day-to-day list of patients admitted. The variables studied were: age, sex, and hospital stay, with site of the infection, isolated microorganisms as well as intrinsic and extrinsic risk factors.

Results:

a marked prevalence after 65 years old in both sexes, the mean of patients presenting hospital-acquired infections was 7,1 days; the most frequent site of infections was in the respiratory tract (46,5 %). Escherichia Coli (35,9 %) was the most isolated microorganism. The presence of coma in the previous 48 hours of the infection, ischemic heart disease and chronic renal failure were the most representative variables of intrinsic risk on the triggering for hospital acquired-infections and the variables of extrinsic risk was associated with the presence of nasogastric tube, the stay in the Intensive Care Unit and the intubation.

Conclusions:

the intrinsic and extrinsic risk factors are representative on the triggering for hospital acquired-infections. Prevention and control are required to decrease its incidence.

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