The results from a survey to estimate the prevalence of health care associated infections (HAI) indicated that UTIs were the most common type of HAI in acute and nonacute hospital inpatients; moreover, in non-acute hospital, 5% of psychiatric inpatients was affected by a HAI (Reilly et al., 2008). According to a prevalence survey done in Norway of infections among hospitalized patients, the psychiatry ward presented the lowest rate of hospital infections and the UTIs were the most common infections among inpatients (Hoving et al., 1981). In a cross sectional study performed to assess the prevalence of infections in psychiatric institutes in Belgium, reported that the UITs were the most common infections moreover, a statistically significant association with infection prevalence were found with the psychiatric diagnosis and duration of hospitalization (Haenen et al., 1997). In spite of epidemiologic assessment of UTIs has been difficult because are not reportable diseases (Foxman, 2002), reports of their incidence have been recorded in subpopulations that are at increased risk. At present, a special attention has been devoted to the study of nosocomial infections in long term care facilities (Nicolle, 2000) which include chronic diseases hospitals, rehabilitation centers, psychiatric hospitals, institutions for the mentally retarded and nursing homes. Nursing homes are a type of geriatric clinic that provide varying levels care (including psychiatric) for aged people, who for personal, social, health or other reasons, can not longer live alone or with their families (Chen et al., 2008) regrettably in some places, these clinics are not equipped with facilities and qualified personal as found in health institutions (Alameida & Pedroso, 1999). In fact, most of research on UTIs among the elderly has done on patients who are institutionalized in nursing homes (Chen et al., 2008; Nicolle, 2002) and hospitals (Foxmann, 2002). In elderly persons, the UTIs are usually asymptomatic i.e. the isolation of bacteria from urine in significant quantities is consistent with the infection, but without the local or systemic genitourinary signs or symptoms. Unlike the symptomatic patients with UTIs, in asymptomatic patients a positive urine culture does not confirm a diagnosis of UTI among this population. Further in geriatric patients, UTIs can be either uncomplicated infections that can occur in a normal genitourinary tract (Nicolle, 2000) or complicated infections characterized by structural or functional abnormalities by instrumentation such as indwelling urinary catheters (Hazeleltt et al., 2006). The prevalence surveys in nursing homes of different countries report that the frequency of asymptomatic bacteruria is 15-30% of men and 25-50% of women and symptomatic episodes contributed to morbidity in this population (Nicolle, 2000). The high frequency is favored by chronic comorbid conditions including mental deterioration, incontinence of bladder and bowel. The latter can associated to degenerative mental disorders such as Parki...