Mechanism of Xueniao Capsule in Treatment of Acute Pyelonephritis Based on Network Pharmacology / 中国实验方剂学杂志

ObjectiveTo explore the mechanism of Xueniao capsule in the treatment of acute pyelonephritis （APN） by network pharmacology and experimental verification. MethodThe effect of Xueniao capsule on APN was investigated based on the APN model in rats. The Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform （TCMSP）， Chemistryl Database， and SymMap were searched for the chemical components of Smilacis Chinae Rhizoma，Coicis Semen， and Trachycarpi Petiolus. The target information of the components was collected from PharmMapper and SwissTargetPrediction， and disease target information from Therapeutic Target Database （TTD）， DrugBank， DisGeNET， GeneCards， and Online Mendelian Inheritance in Man（OMIM）. The key genes of Xueniao capsule for APN underwent Gene Ontology（GO） and Kyoto Encyclopedia of Genes and Genomes（KEGG） pathway enrichment analyses by Metascap. Real-time quantitative polymerase chain reaction （PCR） and Western blot were employed to verify the prediction results. ResultCompared with the blank group and the sham operation group， the model group showed an increased ratio of the left kidney to the right kidney and organ index（P<0.05， P<0.01），up-regulated white blood cells （WBC），neutrophils （NEUT），monocytes （MONO）， and lymphocytes （LY）（P<0.05， P<0.01）， and elevated levels of nuclear factor-κB（NF-κB）， interleukin-6 （IL-6）， and tumor necrosis factor-α （TNF-α）（P<0.05， P<0.01）. Compared with the model group， the norfloxacin group， the low- and high-dose Xueniao capsule groups showed a decreased ratio of the left kidney to the right kidney and organ index（P<0.05， P<0.01）， dwindled levels of WBC， NEUT， MONO， and LY（P<0.05， P<0.01）， and reduced levels of NF-κB， IL-6， and TNF-α（P<0.05， P<0.01）. The medium-dose Xueniao capsule group showed a decreased ratio of the left kidney to the right kidney and organ index（P<0.05， P<0.01）， reduced levels of WBC， NEUT， MONO， and LY（P<0.05， P<0.01）， and dwindled levels of IL-6 and TNF-α（P<0.05， P<0.01）. Network pharmacological analysis revealed 17 active compounds from Smilacis Chinae Rhizoma， 18 active compounds from Coicis Semen， six active compounds from Trachycarpi Petiolus， and 39 key genes for the treatment of APN in Xueniao capsule. GO enrichment analysis demonstrated 704 biological processes， 22 cellular components， and 59 molecular functions. Sixty-two pathways were enriched in KEGG enrichment analysis. The experimental verification results showed that compared with the blank group， the model group showed increased mRNA expression of prostaglandin-endoperoxide synthase 2 （PTGS2）， mitogen-activated protein kinase 1 （MAPK1）/extracellular signal-regulated protein kinase 2 （ERK2），phosphoinositide 3 kinase （PI3K），protein kinase B2（Akt2），Janus kinase 2 （JAK2），and signal transducer and activator of transcription 3 （STAT3）and protein expression of PI3K， Akt2， JAK2， and STAT3 （P<0.05， P<0.01）. Compared with the model group， the low-dose Xueniao capsule group showed decreased mRNA expression of MAPK1， PI3K， JAK2， and STAT3 and protein expression of PI3K， JAK2， and STAT3 （P<0.05， P<0.01）. The medium-dose Xueniao capsule group showed decreased mRNA expression of MAPK1， PTGS2， PI3K， JAK2， and STAT3， and protein expression of PI3K， JAK2， and STAT3 （P<0.05， P<0.01）. The high-dose Xueniao capsule group showed reduced mRNA expression of PTGS2， MAPK1， PI3K， Akt2， JAK2， and STAT3 and protein expression of PI3K， Akt2， JAK2， and STAT3 （P<0.05， P<0.01）. ConclusionXueniao capsule has a certain curative effect on APN via multiple targets and multiple pathways. The mechanism may be related to the inhibition of the PI3K/Akt signaling pathway and the JAK2/STAT3 signaling pathway.

Efectividad del tratamiento quimioprofiláctico sobre las recurrencias en la infección del tracto urinario

Introducción: Los síntomas urinarios constituyen el motivo de consulta pediátrica más frecuente en relación con el aparato urinario durante cualquier época del año y a cualquier edad. Los argumentos para el uso o no de la quimioprofilaxis para evitar las recurrencias, son variables. Objetivo: Verificar la efectividad de la quimioprofilaxis para prevenir las recurrencias en la infección del tracto urinario en niños de 1 a 24 meses. Métodos: Se realizó un cuasi-experimento conformado por 58 pacientes que ingresaron en el Hospital Pediátrico de Holguín que cumplieron con los criterios de inclusión. Las variables de estudio fueron: número de recurrencias, momento de aparición durante la observación, presencia de recurrencia, quimioprofilaxis, tipo de quimioprofilaxis, edad, sexo, microorganismo aislado, factor predisponente, clasificación de riesgo. Se trabajó con 95 % de confiabilidad lo que significó que valores de p por debajo de 0,05 fueron considerados como significativos. Se realizó el procesamiento en el programa SPSS versión 22.0. Resultados: De 58 pacientes estudiados solo tuvieron recurrencia 6,9 %; de los que no recibieron quimioprofilaxis ninguno tuvo recurrencia y los que recibieron tratamiento quimioprofiláctico, 4 tuvieron recurrencia, por lo que haber recibido o no quimioprofilaxis no influyó en la aparición de recurrencia y menos después de 18 meses de una primera infección urinaria. Conclusiones: La presencia de recurrencias después de 18 meses de una primera infección urinaria en niños menores de 2 años no es un evento frecuente y parece que la quimioprofilaxis no es efectiva.

Introduction: Urinary symptoms are the most frequent reason for pediatric consultation related to the urinary system during any time of the year and at any age. The arguments for the use or not of chemoprophylaxis to avoid recurrences are variable. Objective: Confirm the effectiveness of chemoprophylaxis to prevent recurrences of urinary tract infections in children aged 1 to 24 months. Methods: A quasi-experiment consisting of 58 patients admitted to the Children's Hospital of Holguín who met the inclusion criteria was conducted. The study variables were: number of recurrences, time of onset during observation, presence of recurrence, chemoprophylaxis, type of chemoprophylaxis, age, sex, isolated microorganism, predisposing factor, risk classification. We worked with 95% of reliability which meant that p values below 0.05 were considered significant. Processing was performed in the SPSS version 22.0 program. Results: From the 58 patients studied, only 6.9% had recurrence; of those who did not receive chemoprophylaxis none had recurrence and of those who received chemoprophylactic treatment, 4 had recurrence; so, having received or not chemoprophylaxis did not influence the appearance of recurrence and less after 18 months of a first urinary infection. Conclusions: The presence of recurrences after 18 months of a first urinary tract infection in children under 2 years of age is not a frequent event and it seems that chemoprophylaxis is not effective.

Recomendaciones sobre diagnóstico, manejo y estudio de la infección del tracto urinario en pediatría: rama de Nefrología de la Sociedad Chilena de Pediatría. Parte 1 / Recommendations on diagnosis, management and study of the urinary tract infection in pediatrics: nephrology Branch of the Chilean Society of Pediatrics. Part 1

Resumen: La infección del tracto urinario (ITU) es una de las infecciones bacterianas mas frecuentes en la edad pediátrica, pero su diagnóstico y manejo se pueden ver complicados por lo inespecífico de sus sín tomas y signos de presentación, la dificultad en la interpretación de los exámenes, especialmente en niños mas pequeños, y por un pronóstico respecto a daño renal muchas veces incierto. En los últimos años, se ha evidenciado una modificación significativa en el enfoque diagnostico y terapéutico de esta patología, surgiendo la necesidad de actualizar las recomendaciones previas. El propósito de esta re vision es contribuir a reducir la variabilidad de la práctica clínica en el manejo de ITU en la población pediátrica, mejorando la detección y manejo de la patología estructural y otros factores de riesgo de daño renal, evitando acciones innecesarias en aquellos niños con bajo riesgo. En esta primera parte, se presentan las recomendaciones en cuanto a diagnóstico y manejo de la ITU en pediatría. En la segunda parte se detalla su estudio, prevención y seguimiento.

Abstract: Urinary tract infection (UTI) is one of the most frequent bacterial infection in pediatrics. However, its diagnosis and management can be complicated due to the nonspecific clinical presentation, the difficulty of exams interpretation, especially in younger children, and an uncertain prognosis regar ding renal damage. In recent years, significant worldwide change has come in treatment, diagnosis, and images studies, we have decided to update the current recommendations on UTI management published by the Pediatric Nephrology branch of Chilean Pediatrics Society in previous years. The purpose of these recommendations is to reduce the variability of clinical practice in management of UTI in our pediatric population, favoring diagnostic and therapeutic interventions in the most ap propriate way, improving detection and management of structural pathology and other risk factors of renal damage, avoiding unnecessary actions in children with low risk. This first part includes diag nosis and treatment recommendations of urinary tract infection in pediatric age. In the second part the study, prevention and monitoring of urinary tract in pediatric age is detailed.

Epiploic appendagitis with acute pyelonephritis: a case report

Coexistence of acute epiploic appendagitis with acute pyelonephritis is a rare occurrence. Present study report here a case of a 36-year-old male with a past history of appendectomy presenting with complaints of pain abdomen, nausea, increased frequency of micturition and dysuria. On examination, there was tenderness and guarding in the left iliac fossa. CECT abdomen revealed resolving acute epiploic appendagitis with acute pyelonephritis. He was managed conservatively with antibiotics and anti-inflammatory agents to which he responded. Thus, epiploic appendagitis is a benign self-limiting condition which when diagnosed early prevents unnecessary surgical interventions.

Comparison of the diagnostic performance of initial serum procalcitonin, lactate, and C-reactive protein for predicting bacteremia in female patients with acute pyelonephritis

OBJECTIVE: The purpose of the present study was to compare the diagnostic performance of initial procalcitonin, lactate, and high-sensitive C-reactive protein (hsCRP) for predicting bacteremia in female patients with acute pyelonephritis (APN). METHODS: We conducted a retrospective study of female APN patients who visited the emergency department (ED) at the studied hospital between January 2015 and December 2016. The main outcome was bacteremia, which was reported via the first blood culture at ED. The patient demographics, co-morbidities, physiologies, and laboratory variables including initial procalcitonin, lactate, and hsCRP levels, were collected and analyzed to identify associations with the presence of bacteremia. The area under the receiver operating curve (AUROC) and sensitivity (SE)/specificity (SP) were calculated for each variable. RESULTS: During the study period, 282 patients were enrolled. A total of 105 (37.2%) patients had bacteremia. Escherichia coli was the most frequent pathogen. The AUROC was 0.70 (0.63–0.76), 0.70 (0.63–0.76), and 0.56 (0.49–0.63) for the procalcitonin, lactate, and hsCRP, respectively. At a cut-off value of 0.163 ng/mL, the procalcitonin level predicted bacteremia, with a SE/SP of 95.2%/22.6%, respectively. At a cut-off value of 0.7 mmol/L, the lactate level predicted bacteremia with a SE/SP of 96.2%/20.9%, respectively. The combination of a procalcitonin level >0.447 ng/mL or a lactate level >0.7 mmo/L was chosen, as they showed 100% SE and a 100% negative predictive value. CONCLUSION: The initial serum procalcitonin and lactate levels showed similar and fair discriminative performance for predicting bacteremia in female APN patients, while the hsCRP level showed poor performance. The combination of procalcitonin and lactate (procalcitonin level≤0.447 ng/mL and lactate≤0.7 mmol/L) can be used to identify patients at low risk of bacteremia.

Manejo de las infecciones urinarias en la consulta ambulatoria: de las guías a la práctica clínica / Management of urinary tract infections in the outpatient clinic: from the guides to clinical practice

La infección del tracto urinario constituye el segundo proceso infeccioso más frecuente en el ser humano. Existen controversias respecto a la conducta en casos de bacteriuria asintomática, cistitis aguda no complicada, pielonefritis aguda y manejo de pacientes cateterizados. Objetivo: Con este estudio descriptivo basado en la realización de una encuesta pretendemos comparar el manejo de las infecciones urinarias en la consulta ambulatoria con respecto a las recomendaciones de las guías internacionales. Materiales y Métodos: Se realizó un estudio descriptivo basado en una encuesta compuesta de 15 preguntas de selección múltiple basadas en las guías internacionales dirigida a médicos de familia y de atención primaria de la salud (APS). El análisis estadístico de los datos fue realizado con el programa Microsoft Excel 2003®. Las frecuencias fueron expresadas como porcentajes y los datos cuantitativos como media, mediana y moda. Discusión y Resultados: Existe discordancia en el manejo ambulatorio de las infecciones urinarias de los profesionales encuestados en relación a lo establecido en las guías internacionales. El 48,4% de los médicos utiliza la ciprofloxacina como antibiótico de primera línea para la cistitis aguda no complicada; el 50,8% indica el tratamiento antibiótico durante 6 a 10 días. Con respecto a la resistencia de los uropatógenos, solo el 10% conoce como se encuentra la misma en sus centros hospitalarios. En cuanto al tratamiento de la pielonefritis aguda, el 57% considera necesario el tratamiento parenteral en todos los casos.

The infection of the urinary tract constitutes the second most frequent infectious process in the human being. Controversies exist regarding behavior in cases of asymptomatic bacteriuria, uncomplicated acute cystitis, acute pyelonephritis and management of catheterized patients. Objective: With this descriptive study based on the conduct of a survey, we intend to compare the management of urinary tract infections in the outpatient clinic with respect to the recommendations of international guidelines. Material and method: A descriptive study was conducted based on a survey composed of 15 multiple-choice questions based on international guidelines for family doctors and primary health care (PHC). The statistical analysis of the data was performed with the Microsoft Excel 2003® program. The frequencies were expressed as percentages and the quantitative data such as mean, median and fashion. Discussion and Results: There is disagreement in the ambulatory management of urinary tract infections of the professionals surveyed in relation to what is established in the international guidelines.48.4% of doctors use ciprofloxacin as a first-line antibiotic for uncomplicated acute cystitis; 50.8% indicate antibiotic treatment for 6 to 10 days. With respect to the resistance of uropathogens, only 10% know how it is in their hospital centers. Regarding the treatment of acute pyelonephritis, 57% considered parenteral treatment necessary in all cases.

PieloRM: una nueva herramienta en el estudio de pielonefritis aguda en pediatría / PyeloMR (PieloRM): a new tool in the study of acute pyelonephritis in children

Para determinar la existencia de compromiso parenquimatoso renal en infección del tracto urinario en niños, la tendencia actual es utilizar métodos de imágenes lo menos invasivos posibles, disminuyendo al máximo la exposición a radiación ionizante. La resonancia magnética ha demostrado utilidad en la pesquisa de pielonefritis aguda. Desarrollamos por esto un protocolo de resonancia magnética (PieloRM), que permite de manera rápida, segura y no invasiva detectar compromiso inflamatorio parenquimatoso renal, eventuales complicaciones y alteraciones anatómicas preexistentes. Se utilizan secuencias anatómicas potenciadas en T2 y difusión en los planos axial y coronal en el eje largo de los riñones, sin contraste endovenoso ni anestesia, con técnica de privación de sueño, abrigar y alimentar en lactantes y niños más pequeños. La duración total del examen no sobrepasa los 15 minutos.

Current trend to determine kidney involvement in urinary tract infection in children consider less invasive and lower radiation exposure. Magnetic resonance has been reported has a useful tool in acute pyelonephritis suspicion. We developed a fast, safety, non-contrast magnetic resonance protocol to detect renal parenchymal inflammatory changes in children. Complications and anatomical alterations were also possible to be evaluated. Axial and coronal T2-weighted images for anatomical characterization and diffusion weighted images were obtain for kidney representation. Feed and wrap technique and sleep deprivation, with non-additional sedation or anesthesia was used in a 15 minutes total examination protocol.

Risk factor and drug-resistance analysis of acute pyelonephritis in children / 中华实用儿科临床杂志

Objective To investigate the distribution and antibiotic resistance to pathogens isolated from children with acute pyelonephritis(APN) and explore the risk factors for it.Methods A retrospective analysis was performed on the distribution and antibiotic resistance to 173 pathogens isolated from 264 children with APN who hospitalized at Tianjin Children's Hospital from March 2012 to March 2017.The antibiotic resistance to pathogens was determined by using antimicrobial susceptibility.The clinical indicators of children were compared with APN and 200 children with lower urinary tract infection,including sex,age,index of blood and urine.The risk factors for APN were analyzed.Results Gram-negative bacilli were the main pathogen (61.3％),and involved Escherichia coil (E.coil) of 34.1％.Gram-positive cocci accounted for 38.7％,and involved enterococcus faecium of 24.3％.The resistance rate of E.coli to Ampicillin was the highest(89.8％),but the rate significantly decreased by adding Amoxicillin/Clavulanic acid(47.5％).Compared with Ampicillin,the difference was statistically significant(P ＜ 0.05).The resistance rate of E.coli to Tocefoperazone/Sulbactam was significantly lower than to other cephalosporins(P ＜ 0.01).E.coli had lowest resistance rate to Imipenem (0.03 ％).The resistance rate of enterococcus faecium was low to Linezolid and Vancomycin(＜ 5％).Single and multiple regression analysis revealed that younger than 1 year old,children with urinary tract malformation,increasing procalcitonin (PCT) of blood and β2-microglobulin (β2-MG) and neutrophil gelatinase-associated lipocalin (NGAL) of urine were all the risk factors of APN (all P ＜ 0.05).Conclusions E.coil is the major pathogen in children with APN and the enterococci-caused APN has been increasing.These pathogens have a high antibiotic resistance rate.Antimicrobial therapy should be based on the findings of urine culture and antimicrobial susceptibility test.In the children,less than 1 year old,with urinary tract malformation,the increasing PCT of blood,β2-MG and NGAL of urine are the risk factors for APN.

Clinical Usefulness of Unenhanced Computed Tomography in Patients with Acute Pyelonephritis

BACKGROUND: Unenhanced computed tomography (UCT) may be useful for evaluating acute pyelonephritis; however, no study has compared UCT with enhanced computed tomography (ECT) as a diagnostic tool. We evaluated a clinical usefulness of UCT versus ECT in acute pyelonephritis (APN). METHODS: We reviewed the clinical and radiological data from 183 APN-suspected patients who underwent UCT and ECT simultaneously at emergency room (ER) over a two-year period. Demographic, clinical parameters and computed tomography (CT) parameters of 149 patients were compared. RESULTS: The average patient age was 61.2 (± 10) years: 31 patients were men. Ninety-nine (66.4%) patients showed stones (18.7%), perinephric infiltration (56%), swelling (21%), and hydronephrosis (6.7%) on UCT. Seventeen patients (11.4%) had an atypical clinical course, requiring additional tests for accurate diagnosis. In 7 patients UCT and ECT results did not differ; in 10 patients, the diagnosis changed on ECT. On ECT, 112/149 (75.2%) patients had stones (16.7%), perinephric infiltrations (57%), swelling (21%), and hydronephrosis (6.7%); 62.5% showed parenchymal involvement: 34 (22.8%) patients had no abnormal ECT findings. APN CT findings are similar on stone, perinephric infiltration, swelling and hydronephrosis on both CTs. Twelve patients (8.0%) had an abnormal ECT finding, i.e., low-grade (1 and 2) parenchymal involvement. Six (4%) patients developed contrast-induced acute kidney injury within 2 days after ECT. CONCLUSION: We demonstrate that UCT is not inferior to ECT as an initial tool for evaluating APN for screening nephrolithiasis and hydronephrosis without the risk of contrast-induced acute kidney injury (CIAKI). However, patients with an atypical clinical course may still need ECT.

Descriptive Epidemiology of Acute Pyelonephritis in Korea, 2010–2014: Population-based Study

BACKGROUND: Acute pyelonephritis (APN) is one of the most common community-acquired bacterial infections. Recent increases of antimicrobial resistance in urinary pathogens might have changed the other epidemiologic characteristics of APN. The objective of this study was to describe the current epidemiology of APN in Korea, using the entire population. METHODS: From the claims database of the Health Insurance Review and Assessment Service in Korea, the patients with International Classification of Diseases, 10th Revision codes N10 (acute tubulo-interstitial nephritis) or N12 (tubulo-interstitial nephritis, neither acute nor chronic) as the primary discharge diagnosis during 2010–2014 were analyzed, with two or more claims during a 14-day period considered as a single episode. RESULTS: The annual incidence rate of APN per 10,000 persons was 39.1 and was on the increase year to year (35.6 in 2010; 36.7 in 2011; 38.9 in 2012; 40.1 in 2013; 43.8 in 2014, P = 0.004). The increasing trend was observed in both inpatients (P = 0.014) and outpatients (P = 0.004); in both men (P = 0.042) and women (P = 0.003); and those aged under 55 years (P = 0.014) and 55 years or higher (P = 0.003). Eleven times more women were diagnosed and treated with APN than men (men vs. women, 6.5 vs. 71.3), and one of every 4.1 patients was hospitalized (inpatients vs. outpatients, 9.6 vs. 29.4). The recurrence rate was 15.8%, and the median duration from a sporadic episode (i.e., no episode in the preceding 12 months) to the first recurrence was 44 days. The recurrence probability increased with the number of previous recurrences. The average medical cost per inpatient episode was USD 1,144, which was 12.9 times higher than that per outpatient episode (USD 89). CONCLUSION: The epidemiology of APN in Korea has been changing with an increasing incidence rate.

Incidencia de pielonefritis aguda en menores de 5 años hospitalizados con urocultivo positivo / Incidence of Acute Pyelonephritis in Hospitalized Children under 5 Years Old with Positive Urine Culture

Introducción: la infección de las vías urinarias es una causa importante de morbilidad infantil. Establecer si existe pielonefritis aguda es un factor importante para su tratamiento. Materiales y métodos: estudio observacional descriptivo. Se registraron los resultados de uroanálisis, gram de orina y urocultivo de niños entre 3 meses y 5 años de edad hospitalizados con sospecha de infección de las vías urinarias, entre enero de 2008 y diciembre de 2010. En pacientes con urocultivo positivo se evaluó el resultado de la gammagrafía renal, estimando la incidencia de pielonefritis aguda. Resultados: se recolectaron 1.463 historias clínicas y se solicitó urocultivo en 237. De estas, el 54,4% fueron positivas para pielonefritis. En 93 casos se tomaron gammagrafías renales, positivas en el 59,1% de los casos. Conclusiones: la incidencia de pielonefritis aguda en pacientes con infección de las vías urinarias se confirmó en el 59,1%.

Introduction: Urinary tract infection is a major cause of child morbidity. The diagnosis of acute pyelonephritis is important to decide the treatment. Methods: Retrospective observational study. We collected information of urinalysis, urine Gram and urine culture of hospitalized children between 3 months and 5 years old, with suspected urinary tract infection between January 2008 and December 2010. In patients with positive urine culture, the results of renal scintigraphy (Gamma scan) were evaluated to estimate the incidence of acute pyelonephritis. Results: We identified 1,463 medical records. Urinary culture was obtained in 237 patients, of whom 54.4% were positive. Renal scintigraphy was obtained in 93 of these patients and 59.1% were positive. Conclusions: The incidence of acute pyelonephritis in patients with confirmed urinary tract infection was 59.1%.

Clinical implications of DMSA Scan in Childhood Acute Pyelonephritis

PURPOSE: This study aimed to evaluate the relationships between 99mTecnicium-dimercaptosuccinic acid (DMSA) scan findings and clinical parameters including age and fever duration. METHODS: The positive rates for abnormal DMSA scans were analyzed according to the age of patients, fever duration prior to admission, and total fever duration. DMSA scan findings were divided into 3 categories: single defect, multifocal defects, and discrepant defects. We evaluated the detection rates of vesicoureteral reflux according to DMSA scan lesions. RESULTS: Among a total 320 cases, 141 (44.1%) had abnormal DMSA scans. The infant group (0-1 year of age) had a shorter total fever duration, and a lower C-reactive protein (CRP) value and DMSA positive rate (39.8% vs. 60.6%, P=0.002) compared to children group (2-15 years of age). Patients with abnormal scans had a longer total fever duration and higher CRP compared to those with normal scans. The positivity rate of abnormal scans did not differ between the patients with a short fever duration prior to admission of ≤2 days and those with longer fever duration of ≥3 days. However, patients with longer total fever duration had a higher rate of abnormal DMSA scans (P=0.02). Among cases with a single defect, multifocal defects, and discrepant defects, vesicoureteral reflux was observed in 22.4%, 60% and 70.6% of cases, respectively (P=0.004). CONCLUSION: Although DMSA scan has limitations in early diagnosis, DMSA scan findings may aid in the prediction of the severity of systemic inflammation and detection of vesicoureteral reflux.

Clinical implications of DMSA Scan in Childhood Acute Pyelonephritis

PURPOSE: This study aimed to evaluate the relationships between 99mTecnicium-dimercaptosuccinic acid (DMSA) scan findings and clinical parameters including age and fever duration. METHODS: The positive rates for abnormal DMSA scans were analyzed according to the age of patients, fever duration prior to admission, and total fever duration. DMSA scan findings were divided into 3 categories: single defect, multifocal defects, and discrepant defects. We evaluated the detection rates of vesicoureteral reflux according to DMSA scan lesions. RESULTS: Among a total 320 cases, 141 (44.1%) had abnormal DMSA scans. The infant group (0-1 year of age) had a shorter total fever duration, and a lower C-reactive protein (CRP) value and DMSA positive rate (39.8% vs. 60.6%, P=0.002) compared to children group (2-15 years of age). Patients with abnormal scans had a longer total fever duration and higher CRP compared to those with normal scans. The positivity rate of abnormal scans did not differ between the patients with a short fever duration prior to admission of ≤2 days and those with longer fever duration of ≥3 days. However, patients with longer total fever duration had a higher rate of abnormal DMSA scans (P=0.02). Among cases with a single defect, multifocal defects, and discrepant defects, vesicoureteral reflux was observed in 22.4%, 60% and 70.6% of cases, respectively (P=0.004). CONCLUSION: Although DMSA scan has limitations in early diagnosis, DMSA scan findings may aid in the prediction of the severity of systemic inflammation and detection of vesicoureteral reflux.

Clinical Significance of Uptake Difference on DMSA Scintigraphy in Pediatric Urinary Tract Infection

PURPOSE: Disruption of normal renal development can lead to congenital anomalies of the kidney and urinary tract, including renal hypodysplasia. We aimed to clarify whether small kidney size affects clinical manifestations in children with urinary tract infection (UTI). METHODS: One hundred fifty-four patients who had their first symptomatic UTI between January 2014 and June 2015 were enrolled in this study. Differences in kidney size were estimated based on percent uptake of (99m)Tc-dimercaptosuccinic acid (DMSA) in scintigraphy. The patients who showed more than 10% difference in kidney size on DMSA scintigraphy with none or minimal cortical defects were included in group A. (group A, n=17). Laboratory, clinical, and imaging results were compared with those of the other patients (group B, n=137). RESULTS: Group A had a relatively higher incidence of vesicoureteral reflux than group B (44% vs 20%, P<0.05). The levels of plasma neutrophil gelatinase-associated lipocalin (NGAL) and serum C-reactive protein were significantly higher in group A (193 [64-337] vs 91 [59-211] ng/mL and 4.1 [0.5-11.9] vs 2.1 [0.7-5.3] ng/mL, respectively; all P<0.05). Linear regression analysis revealed that plasma NGAL level strongly correlated with the difference in renal uptake in DMSA scintigraphy in group A (R²=0.505). CONCLUSION: The difference in kidney size could influence the clinical course and severity of pediatric UTI.

Prognostic Factors of Renal Scarring on Follow-up DMSA Scan in Children with Acute Pyelonephritis

PURPOSE: Early diagnosis and treatment of urinary tract infection have been emphasized to prevent renal scarring. If untreated, acute pyelonephritis could cause renal injury, which leads to renal scarring, hypertension, proteinuria, and chronic renal failure. The purpose of this study was to assess risk factors of renal scarring after treatment of acute pyelonephritis (APN). METHODS: The medical records of 59 patients admitted at Daegu Fatima Hospital because of APN between March 2008 and April 2015 whose renal cortical defects were confirmed by using initial technetium-99m dimercaptosuccinic acid (DMSA) scans were reviewed retrospectively. We divided 59 patients into 2 groups according to the presence of renal scar and assessed risk factors of renal scar, including sex, age at diagnosis, feeding method, hydronephrosis, bacterial species, vesicoureteral reflux, and vesicoureteral reflux grade. RESULTS: Of 59 patients (41%), 24 showed renal scar on follow-up DMSA scan. No significant differences in sex, hydronephrosis, bacterial species, and fever duration were found between the renal-scarred and non-scarred groups. As for age at diagnosis, age of >12 months had 5.8 times higher incidence rate of renal scarring. Vesicoureteral reflux (VUR) affected renal scar formation. VUR grade III or IV had 14.7 times greater influence on renal scar formation than VUR grade I or II. CONCLUSION: Our data suggest that the presence of VUR and its grade and age at diagnosis are risk factors of renal scar on follow-up DMSA scan after APN.

Headache attributed to acute pyelonephritis

Objective: This study identified the incidence and risk factors for headache attributed to acute pyelonephritis. Methods: The inclusion criteria were patients who were admitted with acute pyelonephritis at our hospital and ≥ 18 years of age. The following exclusion criteria were used: 1) patients who could not express their headache because of mental deterioration, 2) the presence of meningitis or meningoencephalitis, or 3) structural lesions on brain computed tomography or magnetic resonance images that could cause headache. The primary outcome was headache attributed to acute pyelonephritis as a dependent variable. The differences were analyzed using demographic and laboratory profiles as independent variables. Additionally, correlation analysis was performedbetweenseverity of headache using VAS score and demographic and laboratory profiles including age, WBC, and CRP. Results: A total of 479 patients met the inclusion criteria for this study, and 97 patients developed headache attributed to acute pyelonephritis. Patients with headache were younger and more likely to be female, and had a lower incidence of diabetes than those without headache. However, laboratory profiles that reflected the severity of acute pyelonephritis were not predictive factors for headache. Multiple logistic regression analysis demonstrated that young age and non-diabetes were independently significant variables for the prediction of headache attributed to acute pyelonephritis. In addition, the VAS score was found to be negative correlated with age, whereas it was not correlated with WBC and CRP. Conclusions: We determined that headache attributed to acute pyelonephritis was relatively common, and it was related to demographic characteristics but not acute pyelonephritis severity.

Use of cefuroxime for women with community-onset acute pyelonephritis caused by cefuroxime-susceptible or -resistant Escherichia coli

BACKGROUND/AIMS: Efforts to decrease the use of extended-spectrum cephalosporins are required to prevent the selection and transmission of multi-drug resistant pathogens, such as extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae. The objectives of this study were to assess the clinical efficacy of intravenous cefuroxime as an empirical antibiotic for the treatment of hospitalized women with acute pyelonephritis (APN) caused by Escherichia coli. METHODS: We analyzed the clinical and microbiologic database of 328 hospitalized women with community-onset APN. RESULTS: Of 328 women with APN, 22 patients had cefuroxime-resistant E. coli APN, and 306 patients had cefuroxime-susceptible E. coli APN. The early clinical success rates were significantly higher (p = 0.001) in the cefuroxime-susceptible group (90.8%, 278/306) than in the cefuroxime-resistant group (68.2%, 15/22) at 72 hours. The clinical cure rates at 4 to 14 days after completing antimicrobial therapy were not significantly different in the cefuroxime-resistant or -susceptible groups, with 88.2% (15/17) and 97.8% (223/228; p = 0.078), respectively. The microbiological cure rates were not significantly different and were 90.9% (10/11) and 93.4% (128/137), respectively (p =0.550). The median duration of hospitalization in the cefuroxime-resistant and -susceptible groups was 10 days (interquartile range [IQR], 8 to 13) and 10 days (IQR, 8 to 14), respectively (p =0.319). CONCLUSIONS: Cefuroxime, a second-generation cephalosporin, can be used for the initial empirical therapy of community-onset APN if tailored according to uropathogen identification and susceptibility results, especially in areas where the prevalence rate of ESBL-producing uropathogens is low.

Estrategia de estudio en niños con primera infección febril del tracto urinario / Study strategy for children with first febrile urinary tract infection

INTRODUCCIÓN: el estudio de los pacientes con primera infección febril del tracto urinario es un aspecto controversial en la actualidad. OBJETIVO: proponer una estrategia de estudio de los pacientes con primera infección febril del tracto urinario. MÉTODOS: se realizó un estudio prospectivo, longitudinal de 235 pacientes ingresados en la sala de Nefrología, en el período comprendido de mayo 2007 a diciembre 2011. Las variables de estudio fueron: edad, sexo, duración de la fiebre y su intensidad, conteo global de leucocitos sanguíneos, velocidad de sedimentación globular, proteína C reactiva, ultrasonido renal y vesical, reflujo vesicoureteral, agente etiológico, primera y segunda gammagrafía renal y condición clínica. Para la asociación entre variables cualitativas se utilizó la prueba de X2 y el test exacto de Fisher, y para las cuantitativas continuas se utilizó la prueba t de Student. RESULTADOS: del total de los casos estudiados, 125 presentaron alteraciones gammagráficas en la fase aguda de la infección, lo que representó el 53,2 %. A través de receiver operating characteristic curve (ROC), se analizó la capacidad predictiva de las variables clínicas y de laboratorio. La condición clínica fue el mejor predictor de la presencia de pielonefritis. A partir de todos estos resultados, se diseñó un flujograma de tratamiento de pacientes pediátricos con una primera infección febril del tracto urinario. CONCLUSIONES: la condición clínica fue el mejor predictor para el diagnóstico de pielonefritis aguda, lo cual, unido al conocimiento del microorganismo infectante, ayuda en la propuesta de estudio del paciente con primera infección febril del tracto urinario, y se limita la realización de estudios radiológicos.

INTRODUCTION: the study of patients with first febrile urinary tract infection is a controversial issue at present. OBJECTIVE: to submit a research study strategy for patients with first febrile urinary tract infection. METHODS: prospective longitudinal study of 235 patients admitted to the nephrology service from May 2007 to December 2011. The study variables were age, sex, duration and intensity of febrile condition, blood leukocyte count, globular sedimentation velocity, reactive C protein, renal and bladder ultrasound, vesicoureteral reflux, etiological agent, first and second renal scintigraphies and the clinical condition. For the association of qualitative variables, the Chi-square test and Fisher's exact test were used whereas Student's t test was the choice for continuous quantitative variables. RESULTS: of the total number of cases under study, 125 presented with scintigraphic alterations in the acute phase of infection, which accounted for 53.2 %. By means of the receiver operating characteristic curve, the predictive capacity of clinical and laboratory variables were analyzed. The clinical condition was the best predictor of pyelonephritis. On the basis of these results, it was possible to design treatment flow diagram of pediatric patients with first febrile urinary tract infection. CONCLUSIONS: the clinical condition was the best predictor of the acute pyelonephritis diagnosis which, along with determination of the infective microorganism, supports the proposal of the study strategy for patients with first febrile urinary tract infection, thus the performance of radiological studies is restricted.

Phylogenetic Groups and Virulence Factors of Escherichia coli Causing Urinary Tract Infection in Children

PURPOSE: Urinary tract infection (UTI) is a common bacterial infection in children and Escherichia coli is a predominant pathogen. The purpose of this study is to evaluate phylogenetic groups and virulence factors of E. coli causing UTI in children in Korea. METHODS: From October 2010 to April 2013, urinary E. coli strains were isolated from the 33 pediatric patients of UTI. Multiplex polymerase chain reactions were performed to evaluate the phylogenetic groups and 5 virulence factor genes (fimH, sfa, papA, hylA, and cnf1) of E. coli. Distribution of molecular characteristics of E. coli was analyzed by clinical diagnosis and accompanying vesicoureteral reflux (VUR). RESULTS: Most (84.8%) uropathogenic E. coli were belonged to phylogenetics group B2 and the others (15.2%) were belonged to group D. The virulence factors were distributed as: fimH (100%), sfa (100%), hylA (63.6%), cnfI (63.6%), and papA (36.4%). According to clinical diagnosis, phylogenetic distribution of E. coli strain was 92.3% of B2 and 7.7% of D in acute pyelonephritis and 57.1% of B2 and 42.9% of D in cystitis. Distribution of virulence factors was similar in both groups. In patients with acute pyelonephritis, phylogenetic distribution was similar in VUR and non-VUR group, but proportion of papA genes were lower in VUR group than that of non-VUR group (43.8% vs. 20.0%, P=0.399). CONCLUSIONS: This study provides current epidemiologic molecular data of E. coli causing pediatric UTI in Korea and will be a fundamental for understanding the pathogenesis of pediatric UTI.

Pielonefritis aguda recurrente en mujeres / Recurrent acute pyelonephritis in women

Se realizó un estudio descriptivo transversal para describir el comportamiento de la pielonefritis aguda recurrente en mujeres de 18 y más años de edad, que ingresaron en el Hospital Mártires del 9 de Abril de Sagua la Grande, de enero de 2004 a junio de 2007. El universo estuvo constituido por las 593 pacientes ingresadas con ese diagnóstico. Se realizó un muestreo no probabilístico por criterios y la muestra quedó constituida por 67 pacientes. Las edades fluctuaron entre 18 y 85 años. Las manifestaciones clínicas más comunes fueron: dolor lumbar, fiebre y síntomas urinarios bajos. En el examen físico se halló dolor a la palpación profunda de las fosas lumbares, prácticamente, en todos los casos. El diagnóstico de certeza se realizó por el urocultivo, en 104 ocasiones. Los gérmenes que con mayor frecuencia infectaron las vías urinarias altas fueron bacilos gramnegativos y E. Coli fue el más común. La mayor sensibilidad fue a la amikacina y la mayor resistencia, a ampicillina, ciprofloxacilo y ácido nalidíxico. Muchas de las pacientes con mayor cantidad de ingresos tenían anomalías estructurales de las vías urinarias. La enfermedad subyacente más frecuentemente asociada fue la diabetes mellitus

A descriptive cross-sectional study was conducted to describe the behavior of recurrent acute pyelonephritis in women of 18 years of age and older who were admitted to Mártires del 9 de Abril Hospital in Sagua La Grande, from January 2004 to June 2007. The universe was composed of the 593 patients who were admitted with this diagnosis. A non-probabilistic sampling criterion was performed and then, the sample was composed of 67 patients. The ages ranged from 18 to 85 years. The most common clinical manifestations were low back pain, fever and low urinary symptoms. On physical examination, pain on deep palpation of the lumbar fosses was found, practically, in all cases. The diagnosis of certainty was made by urine culture in 104 occasions. The most common germs that infected the upper urinary tracts were gram-negative bacilli, and E. coli was the most common. The greatest sensitivity was seen for Amikacin and the resistance was greater to Ampicillin, Ciprofloxacin and Nalidixic Acid. Many of the patients with the majority of admissions presented structural anomalies of the urinary tract. The most frequently associated underlying disease was diabetes mellitus