RESUMEN
The prevalence of the nosocomial infection was 6, 7%, in the first study done at the University hospital center. The results were considered as underestimated. This study was done to determine the prevalence and risk factors associated with to create a new strategy against NI in this UHC. A cross sectional study was conducted. All the patients hospitalized the day of the study in this establishment were included and were examined to look for NI. The following risk factors were also looked for: the presence of a catheter, a urinary sound and surgical intervention. The statistical analysis was carried out using the software Epi info version 6. Chi-square test was used for comparing categorical data, and the Student's t-test for comparing the means. Significance was taken as P < 0.05. 276 patients were hospitalized the day of the study. Sex Ratio [Men/Women] was 0.92. The average age was 35.25 +/- 21 years with [0 - 84]. More than a third of the investigated patients [40.9%] had surgery and 36.2% of them had a vascular catheter, 13.8% had a urinary sound and 4.3% benefited from artificial ventilation. The prevalence of NI was 11.2% in all departments. 79, 3% of patients got NI on the same day of study and in the same hospitalised department The two main factors associated with the occurance of NI were surgicl operations [p = 0.04] and duration of hospitalisation [15 days or more] [p = 0, 002]. The results between the present and previous study [2004 and 2006 respectively] shows a significant increase of the NI prevalence [p = 0, 036]. The results of this study 2006 allowed estimating the NI prevalence evolution with a more relevant collection of data, consequently, a rational and adequate decision-taking