What Should I Know About Recurrent UTIs in Older Women?

This JAMA Internal Medicine Patient Page describes urinary tract infections, their causes, and how to treat them and prevent future episodes.

Urinary microbiome community types associated with urinary incontinence severity in women.

BACKGROUND: Urinary microbiome (urobiome) studies have previously reported on specific taxa and community differences in women with mixed urinary incontinence compared with controls. Therefore, a hypothesis was made that higher urinary and vaginal microbiome diversity would be associated with increased urinary incontinence severity. OBJECTIVE: This study aimed to test whether specific urinary or vaginal microbiome community types are associated with urinary incontinence severity in a population of women with mixed urinary incontinence. STUDY DESIGN: This planned secondary, cross-sectional analysis evaluated associations between the urinary and vaginal microbiomes and urinary incontinence severity in a subset of Effects of Surgical Treatment Enhanced With Exercise for Mixed Urinary Incontinence trial participants with urinary incontinence. Incontinence severity was measured using bladder diaries and Urinary Distress Inventory questionnaires collected at baseline. Catheterized urine samples and vaginal swabs were concurrently collected before treatment at baseline to assess the urinary and vaginal microbiomes. Of note, 16S rRNA V4 to V6 variable regions were sequenced, characterizing bacterial taxa to the genus level using the DADA2 pipeline and SILVA database. Using Dirichlet multinomial mixtures methods, samples were clustered into community types based on core taxa. Associations between community types and severity measures (Urinary Distress Inventory total scores, Urinary Distress Inventory subscale scores, and the number of urinary incontinence episodes [total, urgency, and stress] from the bladder diary) were evaluated using linear regression models adjusted for age and body mass index. In addition, alpha diversity measures for richness (total taxa numbers) and evenness (proportional distribution of taxa abundance) were analyzed for associations with urinary incontinence episodes and community type. RESULTS: Overall, 6 urinary microbiome community types were identified, characterized by varying levels of common genera (Lactobacillus, Gardnerella, Prevotella, Tepidimonas, Acidovorax, Escherichia, and others). The analysis of urinary incontinence severity in 126 participants with mixed urinary incontinence identified a Lactobacillus-dominated reference group with the highest abundance of Lactobacillus (mean relative abundance of 76%). A community characterized by fewer Lactobacilli (mean relative abundance of 19%) and greater alpha diversity was associated with higher total urinary incontinence episodes (2.67 daily leaks; 95% confidence interval, 0.76-4.59; P=.007) and urgency urinary incontinence episodes (1.75 daily leaks; 95% confidence interval, 0.24-3.27; P=.02) than the reference group. No significant association was observed between community type and stress urinary incontinence episodes or Urogenital Distress Inventory total or subscores. The composition of vaginal community types and urinary community types were similar but composed of slightly different bacterial taxa. Vaginal community types were not associated with urinary incontinence severity, as measured by bladder diary or Urogenital Distress Inventory total and subscale scores. Alpha diversity indicated that greater sample richness was associated with more incontinence episodes (observed genera P=.01) in urine. Measures of evenness (Shannon and Pielou) were not associated with incontinence severity in the urinary or vaginal microbiomes. CONCLUSION: In the urobiome of women with mixed urinary incontinence, a community type with fewer Lactobacilli and more diverse bacteria was associated with more severe urinary incontinence episodes (total and urgency) compared with a community type with high predominance of a single genus, Lactobacillus. Whether mixed urinary incontinence severity is due to lesser predominance of Lactobacillus, greater presence of other non-Lactobacillus genera, or the complement of bacteria consisting of urobiome community types remains to be determined.

Commensal bacteria inhibit viral infections via a tryptophan metabolite.

There is growing appreciation that commensal bacteria impact the outcome of viral infections, though the specific bacteria and their underlying mechanisms remain poorly understood. Studying a simian-human immunodeficiency virus (SHIV)-challenged cohort of pediatric nonhuman primates, we bioinformatically associated Lactobacillus gasseri and the bacterial family Lachnospiraceae with enhanced resistance to infection. We experimentally validated these findings by demonstrating two different Lachnospiraceae isolates, Clostridium immunis and Ruminococcus gnavus, inhibited HIV replication in vitro and ex vivo. Given the link between tryptophan catabolism and HIV disease severity, we found that an isogenic mutant of C. immunis that lacks the aromatic amino acid aminotransferase (ArAT) gene, which is key to metabolizing tryptophan into 3-indolelactic acid (ILA), no longer inhibits HIV infection. Intriguingly, we confirmed that a second commensal bacterium also inhibited HIV in an ArAT-dependent manner, thus establishing the generalizability of this finding. In addition, we found that purified ILA inhibited HIV infection by agonizing the aryl hydrocarbon receptor (AhR). Given that the AhR has been implicated in the control of multiple viral infections, we demonstrated that C. immunis also inhibited human cytomegalovirus (HCMV) infection in an ArAT-dependent manner. Importantly, metagenomic analysis of individuals at-risk for HIV revealed that those who ultimately acquired HIV had a lower fecal abundance of the bacterial ArAT gene compared to individuals who did not, which indicates our findings translate to humans. Taken together, our results provide mechanistic insights into how commensal bacteria decrease susceptibility to viral infections. Moreover, we have defined a microbiota-driven antiviral pathway that offers the potential for novel therapeutic strategies targeting a broad spectrum of viral pathogens.

Proposing the "Continuum of UTI" for a Nuanced Approach to Diagnosis and Management of Urinary Tract Infections.

PURPOSE: Patients with suspected UTIs are categorized into 3 clinical phenotypes based on current guidelines: no UTI, asymptomatic bacteriuria (ASB), or UTI. However, all patients may not fit neatly into these groups. Our objective was to characterize clinical presentations of patients who receive urine tests using the "continuum of UTI" approach. MATERIALS AND METHODS: This was a retrospective cohort study of a random sample of adult noncatheterized inpatient and emergency department encounters with paired urinalysis and urine cultures from 5 hospitals in 3 states between January 01, 2017, and December 31, 2019. Trained abstractors collected clinical (eg, symptom) and demographic data. A focus group discussion with multidisciplinary experts was conducted to define the continuum of UTI, a 5-level classification scheme that includes 2 new categories: lower urinary tract symptoms/other urologic symptoms and bacteriuria of unclear significance. The newly defined continuum of UTI categories were compared to the current UTI classification scheme. RESULTS: Of 220,531 encounters, 3392 randomly selected encounters were reviewed. Based on the current classification scheme, 32.1% (n = 704) had ASB and 53% (n = 1614) did not have a UTI. When applying the continuum of UTI categories, 68% of patients (n = 478) with ASB were reclassified as bacteriuria of unclear significance and 29% of patients (n = 467) with "no UTI" were reclassified to lower urinary tract symptoms/other urologic symptoms. CONCLUSIONS: Our data suggest the need to reframe our conceptual model of UTI vs ASB to reflect the full spectrum of clinical presentations, acknowledge the diagnostic uncertainty faced by frontline clinicians, and promote a nuanced approach to diagnosis and management of UTIs.

Draft genomes of Lactobacillus delbrueckii and Klebsiella pneumoniae coexisting within a female urinary bladder.

Here, we present the draft genome sequences of Lactobacillus delbrueckii and Klebsiella pneumoniae, both isolated from the urinary bladder of an asymptomatic post-menopausal female patient with a diagnosis of recurrent urinary tract infections. These genomes will facilitate analyses of interbacterial interactions in the urinary microbiome.

Standard Restrictions vs Expedited Activity After Pelvic Organ Prolapse Surgery: A Randomized Clinical Trial.

Importance: Restrictions on postoperative activity following pelvic organ prolapse (POP) surgery are not evidence based. Nonetheless, many pelvic surgeons place lifting and activity restrictions on patients following surgery. Objective: To evaluate whether expedited activity results in noninferior anatomic and symptomatic outcomes compared with standard activity restrictions after POP surgery. Design, Setting, and Participants: This randomized noninferiority clinical trial included patients undergoing vaginal or laparoscopic apical reconstructive surgery for POP between July 1, 2020, and October 31, 2021, at a single academic tertiary referral center in Durham, North Carolina. Anatomic outcomes were assessed by masked examiners, and subjective outcomes were assessed via validated surveys, both completed at 3 months postoperatively. Patients meeting minimum physical activity criteria with at least stage II bothersome POP were eligible. A total of 218 patients were approached, of whom 123 were randomly assigned and 107 had complete outcome data and were included in the analysis. Interventions: Patients were randomly assigned to receive standard restrictions vs expedited postoperative activity instructions. Main Outcomes and Measures: The anatomic coprimary outcome was maximum anatomic POP support loss (SLmax), which is the most distal point of pelvic organ support loss according to the Pelvic Organ Prolapse Quantification System (noninferiority margin, 1.0 cm). The symptomatic coprimary outcome was the Pelvic Organ Prolapse Distress Inventory (POPDI) symptom score (noninferiority margin, 34.3 points). Differences between outcomes were assessed using linear regression models controlling for baseline SLmax and POPDI, respectively. Results: Of 123 participants randomized, 107 had complete 3-month outcome data and were included in the analysis. Mean (SD) age was 62.8 (10.1) years. At 3 months, mean (SD) SLmax was -1.7 (1.4) cm in the expedited group and -1.5 (1.4) cm in the standard group (P = .44). After adjusting for baseline SLmax, the mean maximum support loss was 0.18 cm higher within the vaginal canal in the expedited group (95% CI, -0.68 to 0.33 cm). The coprimary outcome of POPDI score was a mean (SD) 23.7 (41.8) points in the expedited group vs 25.7 (39.3) points in the standard group (P = .80). After adjusting for baseline scores, mean POPDI scores were 5.79 points lower in the expedited group (95% CI, -20.41 to 8.84). Conclusions and Relevance: The findings demonstrate that expedited activity after prolapse surgery results in noninferior anatomic and symptomatic prolapse outcomes. It is reasonable to instruct patients undergoing minimally invasive prolapse surgery to resume physical activities ad lib postoperatively. Trial Registration: ClinicalTrials.gov Identifier: NCT04329715.

Robot-assisted laparoscopic anterior urethral diverticulectomy.

INTRODUCTION AND HYPOTHESIS: A 31-year-old patient with a history of fetal sacrococcygeal teratoma requiring tumor resection and pelvic reconstruction in infancy presented with a 3-year history of recurrent vulvar abscesses and voiding dysfunction. Magnetic resonance imaging demonstrated a fluid collection posterior to the pubic bone and inferior to the bladder. The objective was to demonstrate the key steps in the resection and repair of an anterior urethral diverticulum via robot-assisted laparoscopic approach. METHODS: Cystoscopy followed by robot-assisted laparoscopic retropubic dissection was used for resection of an anterior urethral diverticulum followed by urethral reconstruction. RESULTS: Cystoscopy revealed a large anterior cavity at the midpoint of the urethra consistent with an anterior urethral diverticulum. This likely tracked inferiorly toward her vulva during repeated episodes of infection expressing through her recurrent abscesses. Retropubic space exploration revealed dense fibrotic tissue adherent to the underside of the pubic tubercule contiguous with the anterior urethral diverticulum, which was successfully resected. CONCLUSIONS: Female anterior urethral diverticulum is a rare entity. A robot-assisted laparoscopic approach can be safely utilized to identify and resect an anterior urethral diverticulum. Key points include optimization of port placement, use of a council-tip catheter to facilitate bladder drainage in the setting of distorted pelvic anatomy, and multi-layered tension-free urethral closure with flap placement.

AUGS-PERFORM: A New Patient-Reported Outcome Measure to Assess Quality of Prolapse Care.

Patient-reported outcomes (PRO) are important for measuring quality of care, particularly for interventions aimed at improving symptom bother such as procedures for pelvic organ prolapse. We aimed to create a concise yet comprehensive PRO measurement tool to assess pelvic organ prolapse care in high-volume clinical environments. Methods: The relevant concepts to measure prolapse treatment quality were first established through literature review, qualitative interviews, and a patient and provider-driven consensus-building process. Extant items mapping to these concepts, or domains, were identified from an existing pool of patient-reported symptoms and condition-specific and generic health-related quality of life measures. Item classification was performed to group items assessing similar concepts while eliminating items that were redundant, inconsistent with domains, or overly complex. A consensus meeting was held in March 2020 where patient and provider working groups ranked the remaining candidate items in order of relevance to measure prolapse treatment quality. After subsequent expert review, the revised candidate items underwent cognitive interview testing and were further refined. Results: Fifteen relevant PRO instruments were initially identified, and 358 items were considered for inclusion. After 2 iterative consensus reviews and 4 rounds of cognitive interviewing with 19 patients, 11 final candidate items were identified. These items map 5 consensus-based domains that include awareness and bother from prolapse, physical function, physical discomfort during sexual activity, pain, and urinary/defecatory symptoms. Conclusions: We present a concise set of candidate items that were developed using rigorous patient-centered methodology and a national consensus process, including urogynecologic patients and providers.

Commensal Urinary Lactobacilli Inhibit Major Uropathogens In Vitro With Heterogeneity at Species and Strain Level.

The human urinary microbiome is thought to affect the development and progression of urinary tract infections (UTI), particularly recurrent UTIs in aging populations of women. To understand the possible interactions of urinary pathogens with commensal bacteria inhabiting the aging bladder, we conducted an initial functional assessment of a representative set of urinary lactobacilli that dominate this niche in postmenopausal women. We created a repository of urinary bladder bacteria isolated via Enhanced Quantitative Urinary Culture (EQUC) from healthy postmenopausal women, as well as those with a culture-proven recurrent UTI (rUTI) diagnosis. This repository contains lactobacilli strains from eight different species. As many other lactobacilli are known to inhibit human pathogens, we hypothesized that some urinary lactobacilli will have similar abilities to inhibit the growth of typical uropathogens and thus, provide a link between the urinary microbiome and the predisposition to the rUTI. Therefore, we screened the urinary lactobacilli in our repository for their ability to inhibit model uropathogens in vitro. We observed that many urinary isolates strongly inhibit model strains of gram-negative Escherichia coli and Klebsiella pneumoniae but demonstrate less inhibition of gram-positive Enterococcus faecalis. The observed inhibition affected model strains of uropathogens as well as clinical and multidrug-resistant isolates of those species. Our preliminary analysis of inhibition modes suggests a combination of pH-dependent and cell-dependent inhibition. Overall, inhibition strongly varies among species and strains of urinary lactobacilli. While the strength of the inhibition is not predictive of health outcomes in this limited repository, there is a high level of species and strain diversity that warrants future detailed investigations.

Updating Urinary Microbiome Analyses to Enhance Biologic Interpretation.

Objective: An approach for assessing the urinary microbiome is 16S rRNA gene sequencing, where analysis methods are rapidly evolving. This re-analysis of an existing dataset aimed to determine whether updated bioinformatic and statistical techniques affect clinical inferences. Methods: A prior study compared the urinary microbiome in 123 women with mixed urinary incontinence (MUI) and 84 controls. We obtained unprocessed sequencing data from multiple variable regions, processed operational taxonomic unit (OTU) tables from the original analysis, and de-identified clinical data. We re-processed sequencing data with DADA2 to generate amplicon sequence variant (ASV) tables. Taxa from ASV tables were compared to the original OTU tables; taxa from different variable regions after updated processing were also compared. Bayesian graphical compositional regression (BGCR) was used to test for associations between microbial compositions and clinical phenotypes (e.g., MUI versus control) while adjusting for clinical covariates. Several techniques were used to cluster samples into microbial communities. Multivariable regression was used to test for associations between microbial communities and MUI, again while adjusting for potentially confounding variables. Results: Of taxa identified through updated bioinformatic processing, only 40% were identified originally, though taxa identified through both methods represented >99% of the sequencing data in terms of relative abundance. Different 16S rRNA gene regions resulted in different recovered taxa. With BGCR analysis, there was a low (33.7%) probability of an association between overall microbial compositions and clinical phenotype. However, when microbial data are clustered into bacterial communities, we confirmed that bacterial communities are associated with MUI. Contrary to the originally published analysis, we did not identify different associations by age group, which may be due to the incorporation of different covariates in statistical models. Conclusions: Updated bioinformatic processing techniques recover different taxa compared to earlier techniques, though most of these differences exist in low abundance taxa that occupy a small proportion of the overall microbiome. While overall microbial compositions are not associated with MUI, we confirmed associations between certain communities of bacteria and MUI. Incorporation of several covariates that are associated with the urinary microbiome improved inferences when assessing for associations between bacterial communities and MUI in multivariable models.

Risk of obstetric anal sphincter injuries at the time of admission for delivery: A clinical prediction model.

OBJECTIVE: To develop and validate a model to predict obstetric anal sphincter injuries (OASIS) using only information available at the time of admission for labour. DESIGN: A clinical predictive model using a retrospective cohort. SETTING: A US health system containing one community and one tertiary hospital. SAMPLE: A total of 22 873 pregnancy episodes with in-hospital delivery at or beyond 21 weeks of gestation. METHODS: Thirty antepartum risk factors were identified as candidate variables, and a prediction model was built using logistic regression predicting OASIS versus no OASIS. Models were fit using the overall study population and separately using hospital-specific cohorts. Bootstrapping was used for internal validation and external cross-validation was performed between the two hospital cohorts. MAIN OUTCOME MEASURES: Model performance was estimated using the bias-corrected concordance index (c-index), calibration plots and decision curves. RESULTS: Fifteen risk factors were retained in the final model. Decreasing parity, previous caesarean birth and cardiovascular disease increased risk of OASIS, whereas tobacco use and black race decreased risk. The final model from the total study population had good discrimination (c-index 0.77, 95% confidence interval [CI] 0.75-0.78) and was able to accurately predict risks between 0 and 35%, where average risk for OASIS was 3%. The site-specific model fit using patients only from the tertiary hospital had c-stat 0.74 (95% CI 0.72-0.77) on community hospital patients, and the community hospital model was 0.77 (95%CI 0.76-0.80) on the tertiary hospital patients. CONCLUSIONS: OASIS can be accurately predicted based on variables known at the time of admission for labour. These predictions could be useful for selectively implementing OASIS prevention strategies.

Draft Genome Sequence of a Lactobacillus gasseri Strain Isolated from the Catheterized Urine of a Healthy Postmenopausal Woman.

Urinary microbiome composition has been found to associate with health status and to change with age. Lactobacillus gasseri is one of the most frequently found lactic acid bacteria in the vaginal and urinary tracts of women. Here, we report a draft genome sequence of a urinary L. gasseri strain isolated from a healthy postmenopausal woman.

Quantifying the Added Value of 2 Common Frailty Measures for Predicting Adverse Outcomes After Elective Hysterectomy.

IMPORTANCE: Although frailty is predictive of adverse outcomes in predominantly male general and orthopedic surgical populations, the utility of American College of Surgeons National Surgical Quality Improvement Program-based frailty measurement for hysterectomy is unclear. OBJECTIVES: The objective of this study was to measure the added contribution of the modified frailty index (mFI) and Risk Analysis Index (RAI) for predicting adverse outcomes after hysterectomy. STUDY DESIGN: A secondary analysis of the 2011 to 2014 American College of Surgeons National Surgical Quality Improvement database was conducted. Benign elective hysterectomy by any route was included. The primary outcome was readmission within 30 days of surgery. Secondary outcomes were major (Clavien-Dindo grade ≥3) and minor (grade 1-2) complications. The fraction of new prognostic information attributable to each frailty measure was estimated by the ratio of model likelihood-ratio χ 2 values compared with a baseline model, including American Society of Anesthesiologists classification, age, body mass index (BMI), smoking status, and surgical route. RESULTS: Among 70,649 cases, 3.0% (95% confidence interval [CI], 2.9-3.1) were readmitted within 30 days and 2.8% (95% CI, 2.7-2.9) and 5.2% (95% CI, 5.0-5.4) had major and minor complications, respectively. The RAI provided a greater fraction of new prognostic information than the mFI when predicting readmission (4.8 vs 2.7%) and major complications (4.8 vs 2.3%). Interaction analysis showed a stronger association of frailty and outcomes among individuals undergoing abdominal hysterectomy and with BMI of 40 of higher or less than 20. CONCLUSIONS: The RAI and mFI provided modest improvement in the ability to predict adverse outcomes, which limits its clinical utility. Surgeons may consider selective utilization among those individuals undergoing abdominal hysterectomy or with BMI of 40 of higher or less than 20.

Urinary basement membrane graft-augmented sacrospinous ligament suspension: a description of technique and short-term outcomes.

INTRODUCTION AND HYPOTHESIS: Since the discontinuation of manufacture and distribution of surgical mesh for transvaginal prolapse repair, the use of biologic grafts for transvaginal apical suspension has gained renewed attention. However, there is no FDA-approved device and minimal published data describing such an approach. The objective of this video is to describe a technique and to present limited short-term outcomes utilizing a porcine urinary basement membrane (UBM) graft to perform an augmented bilateral sacrospinous ligament suspension (SSLS). METHODS: We present a step-by-step overview of our technique to perform an augmented SSLS with off-label utilization of a 7- × 10-cm porcine UBM graft. We demonstrate graft shaping and application during transvaginal repair along with data describing perioperative outcomes associated with a series of 25 cases performed at our institution using the technique described. RESULTS: No perioperative complications related to the graft were observed in our cohort. The most common postoperative concern was buttock pain, which spontaneously resolved within 6 months. Two individuals (8%) developed recurrent prolapse within 1 year of surgery. CONCLUSIONS: The UBM-augmented apical suspension allows for reinforced transvaginal prolapse repair without the use of permanent mesh material. We have observed good clinical success in our application of this technique, but dedicated research assessing long-term outcomes compared with a native tissue repair is needed.

Association between the urogenital microbiome and surgical treatment response in women undergoing midurethral sling operation for mixed urinary incontinence.

BACKGROUND: The urogenital microbiome is associated with urgency and mixed urinary incontinence symptoms and differential treatment responses to pharmacotherapy for urgency urinary incontinence. OBJECTIVE: This study aimed to describe whether the preoperative urinary and vaginal microbiomes were associated with surgical treatment responses at 12 months after a midurethral sling operation in women with mixed urinary incontinence. STUDY DESIGN: This cohort study compared the preoperative microbiome compositions of urine and vaginal samples from a subset of women undergoing a midurethral sling operation in the Effects of Surgical Treatment Enhanced With Exercise for Mixed Urinary Incontinence trial (NCT01959347) and compared the microbiota in women who were surgical responders vs surgical nonresponders. Twelve-month objective response was defined as a ≥70% reduction from baseline urinary incontinence episodes on a 3-day diary. Subjective response was defined as a change from baseline in the Urogenital Distress Inventory scores. Bacterial abundance and beta diversity were assessed using 16S ribosomal RNA sequencing. The primary differential abundance analysis described predominant bacterial operational taxonomic units associated with responders vs nonresponders using unadjusted and age-adjusted linear models. RESULTS: Objective nonresponders (n=28) compared with responders (n=72) were older (58.5±10.7 vs 51.6±10.2 years) and more likely postmenopausal without hormone use (odds ratio, 6.4; 95% confidence interval, 1.8-22.6). Vaginal and urinary microbiota beta diversities were associated with age (P<.05) for both responders and nonresponders. Overall, predominant operational taxonomic units (genera) were Lactobacillus, Gardnerella, Tepidimonas, Escherichia, Streptococcus, and Prevotella. Operational taxonomic units from baseline urine samples were not significantly associated (P threshold=.05) with surgical treatment responses. A greater abundance of baseline vaginal Lactobacillus was associated with an objective response (P=.04) and Prevotella with an objective nonresponse (P=.01). Adjusting for age, only a greater abundance of baseline vaginal Prevotella was associated with an objective nonresponse (P=.01). Moreover, less abundant vaginal operational taxonomic units were associated with objective and subjective responses and persistent urinary incontinence symptoms (P<.05). CONCLUSION: Women meeting a 70% reduction of urinary incontinence treatment episodes (objective responders) had greater vaginal Lactobacillus at the time of the surgical procedure; however, controlling for age diminished this association. Women not meeting a 70% reduction of urinary incontinence episodes 1 year after a midurethral sling operation had greater vaginal Prevotella at the time of the midurethral sling operation. Further research is needed to determine whether therapy altering the vaginal microbiome may impact surgical treatment responses in women with mixed urinary incontinence.

Cost-effectiveness of bacteriuria screening before urogynecologic surgery.

BACKGROUND: Currently, there is controversy over who requires preoperative screening for bacteriuria in the urogynecologic population and whether treating asymptomatic bacteriuria reduces postoperative urinary tract infection rates. OBJECTIVE: To evaluate the cost-effectiveness of selective, universal, and no preoperative bacteriuria screening protocols in women undergoing surgery for prolapse or stress urinary incontinence. STUDY DESIGN: A simple decision tree model was created from a societal perspective to evaluate cost and effectiveness of 3 strategies to prevent postoperative urinary tract infection: (1) a universal protocol where all women undergoing urogynecologic surgery are screened for bacteriuria and receive preemptive treatment if bacteriuria is identified; (2) a selective protocol, where only women with a history of recurrent urinary tract infection are screened and treated for bacteriuria; and (3) a no-screening protocol, where no women are screened for bacteriuria. Our primary outcome was the incremental cost-effectiveness ratio, calculated in cost per quality-adjusted life-years. Secondary outcomes were the number of urine cultures, postoperative urinary tract infections, and pyelonephritis associated with each strategy. Costs were derived from the Centers for Medicare & Medicaid Services, Healthcare Cost and Utilization Project, and Medical Expenditure Panel Survey. Clinical estimates were derived from published literature and data from a historic surgical cohort. Quality-of-life-associated utilities for urinary tract infection (0.73), pyelonephritis (0.66), and antibiotic use (0.964) were derived from the published literature using the HALex scale, reported directly by affected patients. One-way sensitivity analyses were performed over the range of reported values. RESULTS: In the base case scenario, selective screening is more costly (no screen: $101.69, selective: $101.98) and more effective (no screen: 0.096459 quality-adjusted-life-year, selective: 0.096464 quality-adjusted-life-year) than no screening, and is cost-effective, with an incremental cost-effectiveness ratio of $49,349 per quality-adjusted-life-year. Both selective screening and no screening dominate universal screening in being less costly (universal: $111.92) and more effective (universal: 0.096446 quality-adjusted-life-year), with a slightly higher rate of postoperative urinary tract infection (no screen: 17.1%, selective: 16.9%, universal: 16.6%). In 1-way sensitivity analyses, selective screening is no longer cost-effective compared with no screening when the cost of a urine culture exceeds $12, cost of a preoperative urinary tract infection exceeds $93, the cost of a postoperative urinary tract infection is below $339, the specificity of a urine culture is less than 96%, or preoperative bacteriuria rates in those without symptoms but a history of recurrent urinary tract infection is <23%. Universal screening only becomes cost-effective when the postoperative urinary tract infection rate increases to >50% in those without risk factors and untreated preoperative bacteriuria. When compared with no screening, selective screening costs an additional $104 per urinary tract infection avoided and $2607 per pyelonephritis avoided. Compared with selective screening, universal screening costs $4609 per urinary tract infection avoided and $115,223 per pyelonephritis avoided. CONCLUSION: Implementation of a selective preoperative bacteriuria protocol is cost-effective in most scenarios and associated with only a <1% increase in the 30-day postoperative urinary tract infection rate. No screening is cost-effective when cost of a preoperative urinary tract infection is high and the rate of preoperative bacteriuria in those without risk factors is low.

Species-Level Resolution of Female Bladder Microbiota from 16S rRNA Amplicon Sequencing.

The human bladder contains bacteria, even in the absence of infection. Interest in studying these bacteria and their association with bladder conditions is increasing. However, the chosen experimental method can limit the resolution of the taxonomy that can be assigned to the bacteria found in the bladder. 16S rRNA amplicon sequencing is commonly used to identify bacteria in urinary specimens, but it is typically restricted to genus-level identification. Our primary aim here was to determine if accurate species-level identification of bladder bacteria is possible using 16S rRNA amplicon sequencing. We evaluated the ability of different classification schemes, each consisting of combinations of a reference database, a 16S rRNA gene variable region, and a taxonomic classification algorithm to correctly classify bladder bacteria. We show that species-level identification is possible and that the reference database chosen is the most important component, followed by the 16S variable region sequenced. IMPORTANCE Accurate species-level identification from culture-independent techniques is of importance for microbial niches that are less well characterized, such as that of the bladder. 16S rRNA amplicon sequencing, a common culture-independent way to identify bacteria, is often critiqued for lacking species-level resolution. Here, we extensively evaluate classification schemes for species-level bacterial annotation of 16S amplicon data from bladder bacteria. Our results show that the proper choice of taxonomic database and variable region of the 16S rRNA gene sequence makes species level identification possible. We also show that this improvement can be achieved through the more careful application of existing methods and resources. Species-level information may deepen our understanding of associations between bacteria in the bladder and bladder conditions such as lower urinary tract symptoms and urinary tract infections.

Forming Consensus To Advance Urobiome Research.

Urobiome research has the potential to advance the understanding of a wide range of diseases, including lower urinary tract symptoms and kidney disease. Many scientific areas have benefited from early research method consensus to facilitate the greater, common good. This consensus document, developed by a group of expert investigators currently engaged in urobiome research (UROBIOME 2020 conference participants), aims to promote standardization and advances in this field by the adoption of common core research practices. We propose a standardized nomenclature as well as considerations for specimen collection, preservation, storage, and processing. Best practices for urobiome study design include our proposal for standard metadata elements as part of core metadata collection. Although it is impractical to follow fixed analytical procedures when analyzing urobiome data, we propose guidelines to document and report data originating from urobiome studies. We offer this first consensus document with every expectation of subsequent revision as our field progresses.