Infección urinaria por enterococos: Factores de riesgo y mortalidad. Estudio observacional / Urinary tract infection caused by Enterococcus spp.: risk factors and mortality. An observational study

Antecedentes y objetivo Los enterococos son una causa frecuente de infecciones del tracto urinario (ITU). Este trabajo pretende definir los factores de riesgo asociados con las ITU causadas por enterococos y determinar su mortalidad global y los factores de riesgo predictivos. Materiales y métodos Se llevó a cabo un estudio retrospectivo sobre las ITU bacteriémicas por enterococos en pacientes hospitalizados. Se compararon 106 sujetos hospitalizados por ITU bacteriémicas por enterococos con una muestra aleatoria de 100 pacientes hospitalizados por ITU bacteriémicas por otras enterobacterias. Resultados Se analizó un total de 106 sujetos hospitalizados por ITU por enterococos, 51 de ellos con hemocultivos positivos concomitantes. La distribución por especies fue: 83% por Enterococcus faecalis (E. faecalis) y 17% por Enterococcus faecium (E. faecium). La puntuación media en el índice de comorbilidad de Charlson fue de 5,9 ± 2,9. Al comparar las ITU bacteriémicas por enterococos con las causadas por otras enterobacterias se identificaron los siguientes factores predictivos independientes de ITU bacteriémicas por enterococos: sexo masculino, uropatía obstructiva, infección nosocomial, cánceres de vías urinarias y tratamiento antibiótico previo. En conjunto, la mortalidad hospitalaria fue del 16,5% y se asoció con una mayor puntuación de la escala para la evaluación del daño orgánico secuencial (SOFA) (> 4), a enfermedades concomitantes graves, como inmunodepresión, hemopatía maligna y nefrostomía, y a la especie E. faecium y su patrón de resistencia a la ampicilina o la vancomicina (p < 0,05). Un tratamiento antibiótico empírico adecuado no se relacionó con un mejor pronóstico (p > 0,05). Conclusiones Los enterococos son una causa frecuente de ITU complicadas en pacientes con factores de riesgo. La elevada mortalidad vinculada con la severidad de la infección y el grado de comorbilidad podrían justificar un tratamiento empírico en pacientes de riesgo (AU)

Background and objective Urinary tract infections (UTIs) are frequently caused by Enterococcus spp. This work aims to define the risk factors associated with UTIs caused by Enterococci and to determine its overall mortality and predictive risk factors. Materials and methods A retrospective study was conducted on bacteremic UTIs caused by Enterococcus spp. among inpatients. We compared 106 inpatients with bacteremic UTIs caused by Enterococcus spp. vs. a random sample of 100 inpatients with bacteremic UTIs caused by other enterobacteria. Results A total of 106 inpatients with UTIs caused by Enterococcus spp. were analyzed, 51 of whom had concomitant positive blood cultures. Distribution by species was 83% E. faecalis and 17% E. faecium. The mean Charlson Comorbidity Index score was 5.9 ± 2.9. Upon comparing bacteremic UTIs caused by Enterococcus spp. vs. bacteremic UTIs caused by others enterobacteria, we found the following independent predictors of bacteremic UTI by Enterococcus: male sex, obstructive uropathy, nosocomial infection, cancers of the urinary system, and previous antimicrobial treatment. Overall, inpatient mortality was 16.5% and was associated with a higher Sequential Organ Failure Assessment (SOFA) score (>4); severe comorbidities such as immunosuppression, malignant hemopathy, and nephrostomy; and Enterococcus faecium species and its pattern of resistance to ampicillin or vancomycin (p< 0.05). Appropriate empiric antibiotic therapy was not associated with a better prognosis (p >0.05). Conclusions Enterococcus spp. is a frequent cause of complicated UTI in patients with risk factors. High mortality secondary to a severe clinical condition and high comorbidity may be sufficient for justifying the implementation of empiric treatment of at-risk patients (AU)

Urinary tract infection caused by Enterococcus spp.: Risk factors and mortality. An observational study.

BACKGROUND AND OBJECTIVE: Urinary tract infections (UTIs) are frequently caused by Enterococcus spp. This work aims to define the risk factors associated with UTIs caused by Enterococci and to determine its overall mortality and predictive risk factors. MATERIALS AND METHODS: A retrospective study was conducted on bacteremic UTIs caused by Enterococcus spp. among inpatients. We compared 106 inpatients with bacteremic UTIs caused by Enterococcus spp. vs. a random sample of 100 inpatients with bacteremic UTIs caused by other enterobacteria. RESULTS: A total of 106 inpatients with UTIs caused by Enterococcus spp. were analyzed, 51 of whom had concomitant positive blood cultures. Distribution by species was 83% E. faecalis and 17% E. faecium. The mean Charlson Comorbidity Index score was 5.9±2.9. Upon comparing bacteremic UTIs caused by Enterococcus spp. vs. bacteremic UTIs caused by others enterobacteria, we found the following independent predictors of bacteremic UTI by Enterococcus: male sex, obstructive uropathy, nosocomial infection, cancers of the urinary system, and previous antimicrobial treatment. Overall, inpatient mortality was 16.5% and was associated with a higher Sequential Organ Failure Assessment (SOFA) score (>4); severe comorbidities such as immunosuppression, malignant hemopathy, and nephrostomy; and Enterococcus faecium species and its pattern of resistance to ampicillin or vancomycin (p<0.05). Appropriate empiric antibiotic therapy was not associated with a better prognosis (p>0.05). CONCLUSIONS: Enterococcus spp. is a frequent cause of complicated UTI in patients with risk factors. High mortality secondary to a severe clinical condition and high comorbidity may be sufficient for justifying the implementation of empiric treatment of at-risk patients.

Infección urinaria en el anciano / Urinary infection in the elderly

Introducción: Las infecciones del tracto urinario (ITU) constituyen una de las infecciones más frecuentes. En el anciano presentan diversas comorbilidades. El objetivo de este trabajo es conocer la epidemiologia clínica y microbiológica en el anciano ingresado por ITU y evaluar la idoneidad de los tratamientos empíricos y su implicación con la mortalidad. Material y métodos: Estudio observacional del 2013 al 2015 en 4 hospitales en pacientes mayores de 65 años ingresados en Medicina Interna con diagnóstico clínico y confirmación microbiológica. Se excluyeron los casos de bacteriuria asintomática. Se evaluó la mortalidad intrahospitalaria. Se realizó un análisis univariante y multivariante. Resultados: Se seleccionaron 349 episodios de pacientes con edad media 82 ±11 años, 51% mujeres. La mortalidad fue del 10,3%, asociada a la edad, demencia y presentación como sepsis grave/shock séptico (p < 0,05). Los aislamientos más frecuentes fueron Escherichia coli (E. coli) (53,6%), Klebsiella spp. (8,7%) y Enterococcus spp. (6,6%). Un 13% del total de los aislamientos correspondían a E. coli y Klebsiella spp. con betalactamasas de espectro extendido; el uso previo de antibióticos, cuidados socio-sanitarios y catéter urinario permanente fueron predictores independientes (p < 0,05). El tratamiento empírico resultó adecuado solo en el 73,6% de los casos. La falta de adecuación se asoció a una mayor mortalidad (p < 0,05). Conclusiones: La ITU del anciano que ingresa presenta una alta mortalidad. El tratamiento empírico es frecuentemente inadecuado y puede asociarse a una mayor mortalidad

Introduction: Urinary tract infections (UTIs) are one of the most frequent infections. In the elderly, they have multiple comorbidities. The objective of this work is to describe the clinical and microbiological epidemiology of elderly persons admitted for UTIs and to evaluate the suitability of empirical treatments and their implications regarding mortality. Material and methods: An observational study was conducted during 2013-2015 in 4public hospitals, with patients older than 65 years who were admitted to the Internal Medicine service with a microbiological diagnosis of UTI. Cases of asymptomatic bacteriuria were excluded. In-hospital mortality was analyzed. Univariate analysis and multivariate analysis was carried out. Results: A total of 349 episodes were selected, with a mean age of 82 ± 11 years, 51% female. Mortality was 10.3% and was associated with age, dementia and sepsis and septic shock (P<.05). The most frequent organisms were Escherichia coli(E. coli) (53.6%), Klebsiella spp. (8.7%) and Enterococcus spp. (6.6%). E. coli and Klebsiella spp. with extended-spectrum beta-lactamases (13% of the total isolated) were associated with the previous use of antibiotics, community care treatment and a permanent urinary catheter (P<.05). The empirical treatment was adequate only in 73.6% of cases. As these treatments were associated with higher mortality, they were not considered adequate. Conclusions: In the elderly, UTIs show a high mortality. Empirical treatment is often inadequate and may be associated with increased mortality

Urinary infection in the elderly. / Infección urinaria en el anciano.

INTRODUCTION: Urinary tract infections (UTIs) are one of the most frequent infections. In the elderly, they have multiple comorbidities. The objective of this work is to describe the clinical and microbiological epidemiology of elderly persons admitted for UTIs and to evaluate the suitability of empirical treatments and their implications regarding mortality. MATERIAL AND METHODS: An observational study was conducted during 2013-2015 in 4public hospitals, with patients older than 65 years who were admitted to the Internal Medicine service with a microbiological diagnosis of UTI. Cases of asymptomatic bacteriuria were excluded. In-hospital mortality was analyzed. Univariate analysis and multivariate analysis was carried out. RESULTS: A total of 349 episodes were selected, with a mean age of 82 ± 11 years, 51% female. Mortality was 10.3% and was associated with age, dementia and sepsis and septic shock (P<.05). The most frequent organisms were Escherichia coli(E. coli) (53.6%), Klebsiella spp. (8.7%) and Enterococcus spp. (6.6%). E. coli and Klebsiella spp. with extended-spectrum beta-lactamases (13% of the total isolated) were associated with the previous use of antibiotics, community care treatment and a permanent urinary catheter (P<.05). The empirical treatment was adequate only in 73.6% of cases. As these treatments were associated with higher mortality, they were not considered adequate. CONCLUSIONS: In the elderly, UTIs show a high mortality. Empirical treatment is often inadequate and may be associated with increased mortality.

[Pneumococcal arthritis in paediatric population]. / Artritis neumocócica en población pediátrica.

OBJECTIVE: Cases of septic arthritis in paediatric population by Streptococcus pneumoniae in the Health Area of Santiago de Compostela (Spain) were reviewed. METHODS: A retrospective study from January 2005 to March 2014 was conducted for all S. pneumoniae isolates obtained from joint fluids in children. RESULTS: From the 7,416 joint fluids received in the Microbiology Department, 77 belonged to paediatric patients, and of these, only 8 had positive culture. In total, there were three positive cases for S. pneumoniae, two with positive culture and a third with positive antigen detection. In the three patients (two of them under 15 months) the affected joint was hip, antibiotic treatment was combined with surgical drainage and evolution was favourable. CONCLUSIONS: We conclude that pneumococcal arthritis is an entity that must be taken into account since most cases of arthritis in paediatric population appear as a complication of bacteraemia after a common cold or an ear infection. The greatest risk of sequel is associated with delays in diagnosis, so it is essential clinical and microbiological early diagnosis.

[Changes in the epidemiology of Clostridium difficile infection during 2005-2014 in Salamanca, Spain]. / Cambios en la epidemiología de la infección por Clostridium difficile durante 2005-2014 en Salamanca, España.

OBJECTIVE: To know the most relevant epidemiological features of Clostridium difficile infection (CDI) between 2005- 2014 in the province of Salamanca (Spain). METHODS: Descriptive cross-sectional study carried out through review of the clinical microbiologic records at Complejo Asistencial Universitario de Salamanca. Detection was performed according to standard methodology. RESULTS: 2.6% of stool samples analyzed for detection of C. difficile toxins (9,103) were positive. The average prevalence was 6.8 cases per 100,000 people per year. The mean age was 65 ± 21.4 years and the median 70 years. 59% of cases occurred in patients over 64 years, with an average prevalence of 16.5 (4 times higher than the 15-64 group). Most cases (86.4%) occurred in hospitalized patients, and the group of over 64 had the highest percentage of hospital CDI, with 55%. CONCLUSIONS: A significant increase in the number of requests and in the prevalence of CDI over the decade studied is observed, and prevalence rates were significantly lower than those of other studies. The percentage of CDI increased significantly in both inpatient and community. Age and hospitaliza-tion were risk factors for developing CDI. After the introduc-ion of a molecular detection technique in 2014, the prevalence increased, being 2.5 times higher than 2013.