Infecção do trato urinário por leveduras do gênero Candida ­ revisão de literatura / Urinary tract infection by yeast of the genus Candida - literature review / Infección del tracto urinario causada por levaduras del género Candida - revisión de la literatura

A ocorrência das infecções do trato urinário (ITU) causadas por leveduras do gênero Candida estão aumentando consideravelmente nas últimas décadas, sendo a Candida albicans a mais comumente diagnosticada como causadora deste tipo de infecções. Contudo, outras espécies, como exemplo da Candida tropicalis, estão emergindo como preocupantes causadores da doença. Neste sentido, o objetivo do presente trabalho é revisar os aspectos relacionados com as ITU causadas por leveduras do gênero Candida. Foi realizada uma pesquisa na base de dados PubMed, buscando artigos sobre a epidemiologia, patogenia e tratamento das ITU causadas por leveduras do gênero Candida. As espécies de Candida são os fungos patogênicos oportunistas mais relevantes causadores de infecções nosocomiais e podem causar infecção no trato urinário, tanto inferior (ureteres, bexiga e uretra) quanto superior (rins), principalmente em pacientes imunocomprometidos. Existem alguns fatores predisponentes, como gênero feminino, idade avançada, diabetes mellitus, hospitalização prolongada, imunossupressão, gravidez, hipertensão, neutropenia, cálculos renais, infecções nosocomiais, terapia antibiótica e procedimentos, como a cateterização, que atuam como facilitadores das ITU por Candida spp. A doença pode ocorrer de forma assintomática, porém, pode evoluir para casos mais graves com comprometimento sistêmico em situações de candidemia que pode causar a morte do paciente, principalmente se tratando de indivíduos imunocomprometidos. Sendo assim, devido ao risco existente, a doença não pode ser negligenciada e um diagnóstico preciso e um tratamento adequado devem ser estabelecidos.

The occurrence of urinary tract infections (UTI) caused by yeasts of the genus Candida has increased considerably in recent decades, with Candida albicans being the most commonly diagnosed as causing this type of infections. However, other species, such as Candida tropicalis, are emerging as worrisome causes of the disease. In this sense, the objective of the present paper is to review the aspects related to the UTI caused by yeasts of the genus Candida. A search was carried out in the PubMed database, searching for articles on the epidemiology, pathogenesis and treatment of UTI caused by yeasts of the genus Candida. Candida species are the most relevant opportunistic pathogenic fungi that cause nosocomial infections and can cause both lower (ureters, bladder and urethra) and upper (kidneys) urinary tract infections, especially in immunocompromised patients. There are some predisposing factors, such as female gender, advanced age, diabetes mellitus, prolonged hospitalization, immunosuppression, pregnancy, hypertension, neutropenia, kidney stones, nosocomial infections, antibiotic therapy and procedures, such as catheterization, that act as facilitators of UTI by Candida spp. The disease can occur asymptomatically, however, it can progress to more severe cases with systemic involvement in situations of candidemia that can cause the death of the patient, especially in immunocompromised individuals. Therefore, due to the existing risk, the disease cannot be neglected and an accurate diagnosis and adequate treatment must be established.

La aparición de infecciones del tracto urinario (ITU) causadas por levaduras del género Candida ha aumentado considerablemente en las últimas décadas. Candida albicans es la infección por levaduras más comúnmente diagnosticada. Sin embargo, otras especies, como la Candida tropicalis, están surgiendo como causa preocupante de la enfermedad. En este sentido, el objetivo del presente trabajo es revisar los aspectos relacionados con la ITU causada por levaduras del género Candida. Se realizó una búsqueda en la base de datos PubMed, buscando artículos sobre la epidemiología, la patogénesis y el tratamiento de la ITU causada por levaduras del género Candida. Las especies de Candida son los hongos patógenos oportunistas más relevantes que causan infecciones nosocomiales y pueden provocar infecciones del tracto urinario inferior (uréteres, vejiga y uretra) y superior (riñones), especialmente en pacientes inmunodeprimidos. Existen algunos factores predisponentes, como el sexo femenino, la edad avanzada, la diabetes mellitus, la hospitalización prolongada, la inmunosupresión, el embarazo, la hipertensión, la neutropenia, los cálculos renales, las infecciones nosocomiales, la terapia con antibióticos y los procedimientos como el cateterismo, que actúan como facilitadores de la ITU por Candida spp. La enfermedad puede presentarse de forma asintomática, pero puede evolucionar a casos más graves con afectación sistémica en situaciones de candidemia que pueden causar la muerte del paciente, especialmente en individuos inmunodeprimidos. Por lo tanto, debido al riesgo existente, no se puede descuidar la enfermedad y se debe establecer un diagnóstico preciso y un tratamiento adecuado.

Pielonefritis Enfisematosa. Reporte de dos casos / Emphysematous pyelonephritis. Report of two cases

RESUMEN La pielonefritis enfisematosa se considerada una entidad clínica inusual. Constituye una infección necrotizante aguda, con formación de gas en el parénquima renal, sistema colector y/o espacio perirrenal. La población diabética es más propensa a este tipo de pielonefritis, pero se han descrito casos de pielonefritis enfisematosa recurrente en pacientes con obstrucción de la vía urinaria en ausencia de diabetes mellitus. Del 69 al 97 % de los casos, el germen implicado en la génesis de la enfermedad es la Escherichia coli, seguido por la klebsiella pneumoniae; responsable de una enfermedad con alto impacto en la morbimortalidad de los pacientes diabéticos. El conocer esta entidad clínica, permite realizar un diagnóstico precoz con el fin de establecer el tratamiento más adecuado que contribuya a una mejor sobrevida en el paciente. Los estudios tomográficos orientan en el diagnóstico, facilitan tener la opción de un tratamiento conservador y cuando lo requiera un correcto tratamiento invasivo, que debe ser individualizado según la posible causa que lo genera (AU).

ABSTRACT Emphysematous pyelonephritis is considered an unusual clinical entity. It is an acute necrotizing infection, with gas formation in the renal parenchyma, the collector system and/or perinephric space. Diabetic population is more prone to this kind of pyelonephritis, but cases of emphysematous pyelonephritis have been described in patients with urinary tract obstruction in absence of Diabetes mellitus. On 69 to 97 % of the cases, the germ implied in the disease genesis is Escherichia coli, followed by Klebsiella pneumonia, that are responsible for a disease having a high impact on the diabetic patients´ morbidity and mortality. Knowing this clinical entity allows arriving to a precocious diagnosis with the aim of establishing the most suitable treatment contributing to a better patients´ survival. Tomographic studies guide in the diagnosis, facilitate the option of a conserving treatment, and when it is required a correct invasive treatment individualized according to the possible cause generating it (AU).

Asociación entre el reflujo vesicoureteral y la nefroesclerosis en las infecciones urinarias / Association of vesicoureteral reflux and renal scarring in urinary tract infections

Introducción. El objetivo del estudio fue investigar la relación entre reflujo vesicoureteral (RVU) y daño renal en pacientes con infección urinaria (IU) sin fiebre, primera IU febril e IU recurrente. El objetivo secundario, determinar si la proteína C-reactiva (PCR) actuaría como predictor de nefroesclerosis en las IU febriles. Población y métodos. Estudio prospectivo; pacientes pediátricos con IU sin fiebre, primera IU febril e IU recurrente. Los análisis de laboratorio de rutina incluyeron hemograma completo, urea, creatinina, análisis de orina completamente automatizado, urocultivo y PCR. Se realizó ecografía urológica luego del diagnóstico de IU, cistouretrografía miccional tras seis semanas y gammagrafía renal estática con ácido dimercaptosuccínico marcado con 99mTc tras seis meses a todos los participantes. Resultados. Participaron 47 niños con IU sin fiebre, 48 con primera IU febril y 61 con IU recurrente. Hubo una diferencia estadísticamente significativa entre los grupos respecto de RVU y nefroesclerosis (p= 0,001 y p= 0,011, respectivamente). También hubo una diferencia estadísticamente significativa respecto de nefroesclerosis entre los pacientes con y sin RVU (p= 0,001). Además, se estableció una diferencia estadísticamente significativa respecto de nefroesclerosis (p < 0,05) en los pacientes con PCR cinco veces mayor o menor que el valor de corte aceptado (5 mg/dl). Conclusión. La proporción de nefroesclerosis fue paralela a la frecuencia de RVU. Cuanto mayor era el grado de RVU, mayor era el daño renal. Se determinó una correlación positiva entre PCR elevada y nefroesclerosis, lo que señala esclerosis durante el diagnóstico de pielonefritis.

Introduction. The aim was to investigate the relationship between vesicoureteral reflux (VUR) and renal damage in non-febrile, febrile for the first time and recurrent urinary tract infection (UTI) patients. The secondary aim was to determine whether C-reactive protein (CRP) in febrile UTIs could be a predictor of renal scarring. Population and methods. This prospective study included non-febrile, febrile for the first time and recurrent pediatric UTI cases. The routine lab analyses comprised a complete blood count, urea, creatinine, fully automated urinalysis, urine culture and CRP analyses. All the participants were examined using urine ultrasonography subsequent to their UTI diagnosis, voiding cystourethrography (VCUG) after six weeks and Tc-99m dimercaptosuccinic acid (DMSA) static renal scintigraphy after six months. Results. There were included 47 children with non-febrile UTIs, 48 with first febrile UTIs and 61 with recurrent UTIs. A statistically significant difference was found among the groups in terms of VUR and renal scarring (p= 0.001 and p= 0.011, respectively). A statistically significant difference was also found in terms of renal scarring between patients with and without VUR (p= 0.001). Moreover, a statistically significant difference was also present in relation to renal scarring (p <0.05) in patients with five-fold lower or higher CRP values than the accepted cut-off value (5mg/dl). Conclusion. The ratio of renal scars detected was found to be parallel to the VUR frequency. The higher the VUR grade, the more renal damage was found. A positive correlation between elevated CRP and renal scarring was determined, indicating the presence of scarring during the diagnosis of pyelonephritis.

Endoftalmite fúngica endógena bilateral secundária a pielonefrite obstrutiva / Bilateral endogenous fungal endophthalmitis secondary obstructive pyelonephritis

RESUMO Os autores relatam um caso de endoftalmite fúngica endógena bilateral ocorrida após nefrostomia descompressiva decorrente de pielonefrite obstrutiva secundária a nefrolitíase tratada, inicialmente, com injeção intravítrea de voriconazol (100 ìg/0.1 ml) porém evoluiu sem resposta terapêutica sendo necessária a vitrectomia posterior (23G).

ABSTRACT The authors report a case of bilateral endogenous fungal endophthalmitis occurred after decompression nephrostomy due to secondary obstructive pyelonephritis the treated nephrolithiasis initially with intravitreal voriconazole (100 mg / 0.1 ml) but evolved without therapeutic response requiring the posterior vitrectomy (23G).

Megalocytic Interstitial Nephritis Following Acute Pyelonephritis with Escherichia coli Bacteremia: A Case Report

Megalocytic interstitial nephritis is a rare form of kidney disease caused by chronic inflammation. We report a case of megalocytic interstitial nephritis occurring in a 45-yrold woman who presented with oliguric acute kidney injury and acute pyelonephritis accompanied by Escherichia coli bacteremia. Her renal function was not recovered despite adequate duration of susceptible antibiotic treatment, accompanied by negative conversion of bacteremia and bacteriuria. Kidney biopsy revealed an infiltration of numerous histiocytes without Michaelis-Gutmann bodies. The patient's renal function was markedly improved after short-term treatment with high-dose steroid.

Relationship Between Uncommon Computed Tomography Findings and Clinical Aspects in Patients With Acute Pyelonephritis

PURPOSE: Computed tomography (CT) has become popular in the diagnosis of acute pyelonephritis (APN) and its related complications in adults. The aim of this study was to investigate the relationship between uncommon CT findings and clinical and laboratory data in patients with APN. MATERIALS AND METHODS: From July 2009 to July 2012, CT findings and clinical data were collected from 125 female patients with APN. The six uncommon CT findings (excluding a wedge-shaped area of hypoperfusion in the renal parenchyma) studied were perirenal fat infiltration, ureteral wall edema, renal abscess formation, pelvic ascites, periportal edema, and renal scarring. The clinical parameters analyzed were the age and body mass index of the patients as well as the degree and duration of fever. Laboratory parameters related to inflammation and infection included white blood cell count, C-reactive protein (CRP) level, erythrocyte sedimentation rate, pyuria, and bacteriuria. RESULTS: The most common CT finding was perirenal fat infiltration (69 cases, 55%). A longer duration of fever, higher CRP level, and grade of pyuria were related with perirenal fat infiltration (p=0.010, p=0.003, and p=0.049, respectively). The CRP level was significantly higher in patients with renal abscess and ureteral wall edema (p=0.005 and p=0.015, respectively). CONCLUSIONS: The uncommon CT findings that were related to aggravated clinical and laboratory parameters of APN patients were perirenal fat infiltration, ureteral wall edema, and renal abscess formation. The inflammatory reaction and tissue destruction may be more aggressive in patients with these CT findings.

Pielonefritis, colecistitis y cistitis enfisematosas en paciente con diabetes mellitus descompensada / Pyelonephritis, cholecystitis, and emphysematous cystitis in a diabetic patient

Background. Emphysematous pyelonephritis is a necrotizing infection characterized by gas production that usually is located in the kidney tissue, urinary tract and retroperitoneal tissue. Gas can escape following the renal veins and accumulate in the hepatic veins and other places. E coli is the most common causative organism. Clinical case: We report a 62 years old diabetic female, admitted to the hospital with a diabetic ketoacidosis. An abdominal CT scan disclosed a left emphysematous pyelonephritis, cholecystitis and cystitis. The patient was operated, performing a left nephrectomy, cholecystectomy and placement of sub hepatic and retroperitoneal drainages. The pathological study of the surgical piece showed an acute pyelonephritis with abscess formation and chronic cholecystitis. The patient died due to a multi systemic failure.

Introducción: La Pielonefritis enfisematosa es una infección necrotizante caracterizada por la producción de gas, que habitualmente se ubica en el parénquima renal, las vías urinarias y los tejidos retroperi-toneales. Cuando el gas es abundante puede escapar siguiendo las venas renales y acumularse en las venas hepáticas, y el resto del sistema. La E. coli es el patógeno más frecuente. Caso clínico: Presentamos el caso de paciente femenina de 62 años, diabética que ingresa con sintomatología de vías urinarias diagnosticada como pielonefritis enfisematosa izquierda por tomografía y encontrando como hallazgos adicionales.

Risk factors of renal scars in children with acute pyelonephritis

OBJECTIVE: The aim of this study was to determine the association between previously documented risk factors such as recurrent pyelonephritis with the incidence of renal scarring after acute pyelonephritis in children. MATERIAL AND METHODS: Children with acute pyelonephritis who were admitted to the Department of Pediatrics of a teaching hospital during 2007-2009 were enrolled in this study. DMSA scans were obtained 4-6 months after the last episode of pyelonephritis in all patients. RESULTS: A total of 80 children with acute pyelonephritis were enrolled in this study. Most of them were girls (77.5 percent), with a median age of 12 months. Nearly half of the children (n = 44; 55 percent) had one or more renal scars. The distribution of gender, CRP level and leukocytosis did not differ significantly regardingthe absence or presence of renal scars (p > 0.05). Most of the scars occurred in children who had presented with bilateral pyelonephritis (69.4 percent vs. 18.2 percent, p = 0.001). Most of the patients with renal scars had a positive history of vesicoureteral reflux (VUR) (75 percent vs.13.6 percent, p = 0.001). The significant roles of recurrent pyelonephritis and presence of VUR were further confirmed by multivariate analysis. CONCLUSIONS: According to our findings, presence of VUR and recurrent pyelonephritis are independently associated with a higher incidence of renal scarring.

Extensive renal destruction due to severe emphysematous pyelonephritis

Emphysematous pyelonephritis [EPN] is a severe necrotizing infection of the kidney characterized by the presence of gas in renal parenchyma, collecting system or perinephric tissue. It can be life threatening if not recognized and treated promptly. We have reported the case of a 56-year-old woman with a previous history of diabetes mellitus, who was suffering from left-sided flank pain and fever. Diagnosis workup revealed an extensive destruction of the left kidney secondary to an EPN. We opted for a left nephrectomy and intravenous antibiotics. The immediate postoperative course was uncomplicated but the patient developed a chronic renal failure within 1 year

Comparison of Ertapenem and Ceftriaxone Therapy for Acute Pyelonephritis and Other Complicated Urinary Tract Infections in Korean Adults: A Randomized, Double-Blind, Multicenter Trial

The efficacy and safety of ertapenem, 1 g once daily, were compared with that of ceftriaxone, 2 g once daily, for the treatment of adults with acute pyelonephritis (APN) and complicated urinary tract infections (cUTIs) in a prospective, multicenter, double-blinded, randomized study. After > or = 3 days of parenteral study therapy, patients could be switched to an oral agent. Of 271 patients who were initially stratified by APN (n = 210) or other cUTIs (n = 61), 66 (48.9%) in the ertapenem group and 71 (52.2%) in the ceftriaxone group were microbiologically evaluable. The mean duration of parenteral and total therapy, respectively, was 5.6 and 13.8 days for ertapenem and 5.8 and 13.8 days for ceftriaxone. The most common pathogen was Escherichia coli. At the primary efficacy endpoint 5-9 days after treatment, 58 (87.9%) patients in the ertapenem group and 63 (88.7%) in the ceftriaxone had a favorable microbiological response. When compared by stratum and severity, the outcomes in the two groups were equivalent. The frequency and severity of drug-related adverse events were generally similar in both treatment groups. The results indicate that ertapenem is highly effective and safe for the treatment of APN and cUTIs.

Hallazgos gammagráficos en niños con primera infección febril del tracto urinario / Scintigraphy findings in children presenting the first febrile infection of urinary tract

INTRODUCCIÓN. La infección del tracto urinario es una de las infecciones bacterianas más frecuentes en la infancia. El objetivo de esta investigación fue conocer las alteraciones renales en la fase aguda de la primera infección febril del tracto urinario. MÉTODOS. Se estudiaron 90 niños con diagnóstico microbiológico de primera infección febril del tracto urinario, a los cuales se les realizó gammagrafía renal con Tc DMSA en la fase aguda de la infección. Los resultados de la gammagrafía se correlacionaron con la duración e intensidad de la fiebre antes del diagnóstico, los reactantes de la fase aguda (hemograma, ritrosedimentación y proteína C reactiva [PCR]) y los resultados de los estudios radiológicos (ultrasonido renal y uretrocistografía miccional). RESULTADOS. Predominó el sexo femenino y el 84,4 por ciento de los pacientes fueron menores de 1 año. El 59 por ciento de los pacientes presentaron alteraciones gammagráficas y el patrón de hipocaptación del radiofármaco fue el hallazgo que predominó en el 75,5 por ciento de éstos. No se encontró asociación significativa al relacionar la duración e intensidad de la fiebre con las alteraciones renales. De los parámetros de laboratorio solo la PCR tuvo significación estadística con las alteraciones renales y los hallazgos radiológicos detectados por el ultrasonido renal y uretrocistografía miccional no se correlacionaron estadísticamente con la afectación renal detectada con la gammagrafía renal.CONCLUSIONES. Un porcentaje elevado de los pacientes presentó extensión de la infección al parénquima renal y la PCR fue el único parámetro orientador de daño renal

INTRODUCTION. Urinary tract infection (UTI) is one of the more frequent bacterial infections in childhood. The aim of present research was to know the acute phase renal alterations of the first febrile infection of urinary tract. METHODS. Ninety children with a microbiological diagnosis of first febrile infection of urinary tract were studied and a renal Tc DMSA scintigraphy was done in the acute phase of infection. Scintigraphy results were correlated with the fever length and intensity before diagnosis, acute phase reactants (hemogram, erythrosedimentation and C reactive protein (CRP) and the radiological studies results (renal US and urination urethrocystography). RESULTS. There was a female sex predominance and the 84,4 percent of patients were under 1 year. The 59 percent of patients had scintigraphy alterations and the radiodrug hypocaptation pattern was the predominant finding in the 75,5 percent of them. There was not a significant association between the fever length and intensity and the renal alterations. From the laboratory parameters only the RCP was statistically significant with renal alterations and the radiologic findings detected by renal US and urination urethrocystography had not statistic correlation with the renal affection detected by renal scintigraphy. CONCLUSIONS. A high percentage of patients had an extensive infection to renal parenchyma and the CRP was the only guiding parameter of renal damage

Drenaje percutáneo de absceso renal en niños: caso clínico / Percutaneous draining of a kidney abscess in children: a clinical case

Introduction: Renal abscesses in children are rare. Percutaneous draining is a useful tool, frequently used among adults. The objective of this presentation is to present a pediatric case of a percutaneous-drained renal abscess. Patients and Methods: A 9 year old girl with a history of recurring acute left pyelonephritis was admitted for a new episode, which evolved into a 4.6 cm renal abscess, detected on a sonogram. Antibiotic treatment was effective, resulting in clinical and image resolution. Ten days post treatment, the abscess recurred, this time it was treated with an aspiration punction and antibiotics, with a good clinical response. Follow up image showed resolution. Again, follow up showed a recurrence of the abscess. This time a percutaneous drain was utilized, with complete clinical and image resolution. Various therapeutic alternatives, and the use of drains in children are discussed.

Introducción: Los abscesos renales en niños son infrecuentes. El tratamiento con drenaje percutáneo es una herramienta útil, y frecuentemente utilizada en adultos. El objetivo es presentar la experiencia en drenaje per-cutáneo de un absceso renal en paciente pediátrico. Paciente y Método: Se reporta el caso de una paciente de 9 años, de sexo femenino, con antecedente de pielonefritis aguda izquierda a repetición. Presenta un cuadro de pielonefritis aguda complicada, evolucionando con un absceso renal de 4,6 cm, detectado por ecotomografía. Es tratada con esquema antibiótico biasociado, con mejoría clínica e imagenológica. Evoluciona con reproducción del absceso a los 10 días post tratamiento, manejándose en esta ocasión con punción aspirativa y antibióticos, obteniendo buena respuesta clínica y resolución imagenológica. Posterior al tratamiento presenta recidiva del absceso, tratándose en esta ocasión con drenaje percutáneo, con mejoría clínica y radiológica definitiva, y sin presentar reproducción del absceso en el seguimiento alejado. Se discuten las distintas alternativas terapéuticas y el uso del drenaje percutáneo en el manejo del absceso renal en los niños. Conclusión: El drenaje percutáneo del absceso renal se debe tener presente como una alternativa a la cirugía en el tratamiento de abscesos renales en casos seleccionados.

[Diagnostic value of power doppler sonography in acute pyelonephritis in children]

Urinary tract infection is common in pediatric age group and can result in serious complications such as chronic renal failure and hypertension if renal parenchyma is involved. Thus, definitive diagnosis of pyelonephritis in equivocal cases is of great importance. Comparing the diagnostic value of power color Doppler sonography and DMSA scan in acute pyelonephritis in children. This was a descriptive study carried out on 80 pediatric patients [160 renal units] suspected of having pyelonephritis. Two diagnostic methods [DMSA scan and power color Doppler sonography] were performed for all patients. Assuming DMSA scan as the gold standard method in diagnosis of acute pyelonephritis, the sensitivity, specificity, positive and negative predictive values and also the accuracy of power color Doppler sonography were calculated and analyzed, statistically. Power color Doppler sonography showed a sensitivity of 66.3%, specificity of 77.5%, positive predictive value of 78.7%, and negative predictive value of 64.7% with an accuracy of 71.3% in diagnosis of acute pyelonephritis in children. The agreement between the two diagnostic tests was shown to be around 43%. Based on our data, the power color Doppler sonography of kidneys has lower sensitivity and specificity compared to those obtained by DMSA scan in diagnosing acute pyelonephritis in children and is not considered as an ideal diagnostic technique for this particular clinical condition