Incidence of urosepsis or pyelonephritis after uncomplicated urinary tract infection in older women

Management of Urinary Tract Infection Symptoms in Older Women: A Survey of Practitioners

IMPORTANCE

Urinary tract infection (UTI) is the most common bacterial infection for which empiric antibiotics are prescribed despite limited progression to urosepsis. More than half of antibiotics prescribed to older adults for a suspected UTI are considered unnecessary.

OBJECTIVE

The aim of the study was to assess knowledge, attitudes, and practices regarding management of older women (>65 years) with symptoms attributed to UTIs among family and internal medicine providers.

STUDY DESIGN

This cross-sectional study surveyed 330 primary care providers in November 2021 regarding management of UTI symptoms. The primary outcome was the proportion of primary care providers who felt safe waiting for urine culture results before prescribing antibiotics in older women.

RESULTS

The response rate was 43.0% (n = 142) with the majority of primary care providers practicing medicine more than 15 years (56.3%). For the primary outcome, 26.1% (n = 37) of primary care providers felt safe waiting for a urine culture result before prescribing antibiotics, while 62.0% (n = 88) felt delaying antibiotics depended on multiple factors, and 9.2% (n = 13) felt it was never safe to delay antibiotics. Primary care providers that either never felt it was safe to delay antibiotics or felt that "it depends" on a variety of factors, attributed their antibiotics administration to concern for progression to sepsis (n = 50, 49.5%) or progression of symptoms (n = 28, 27.7%). A higher proportion of primary care providers practicing more than 15 years felt safe delaying antibiotics compared with primary care providers with less experience (33.8% vs 18.3%, P = 0.04), and 70.3% of those who felt safe delaying antibiotics had more than 15 years of experience.

CONCLUSION

Primary care providers with more clinical experience have more comfort delaying antibiotics in older women with UTI symptoms.

Decision-making and Treatment Preferences Surrounding Bacteriuria in Nonpregnant Women: A Qualitative Investigation

INTRODUCTION AND HYPOTHESIS

Best practices suggest nontreatment for asymptomatic bacteriuria in a nonpregnant population, yet there is little literature on patient preference or understanding of asymptomatic bacteriuria treatment. We hypothesize that there might be core factors that affect antibiotic preferences and care-seeking decisions for urinary tract infection and asymptomatic bacteriuria in a postmenopausal population.

METHODS

We performed semi-structured interviews with postmenopausal individuals who had been previously treated for at least one patient-reported urinary tract infection. Interviews covered a discussion about their approach to seeking antibiotics for management and knowledge/preferences for asymptomatic bacteriuria management. Two authors independently coded the interviews and identified a set of symptom-related knowledge and experiences that relate to care-seeking and treatment preferences. We then graphically represented a mental model of antibiotic-seeking practices as an influence diagram, illustrating how knowledge and values affect preferences for care.

RESULTS

We performed 30 interviews of participants with a mean age of 69.4 (SD 6.4). Among participants, there were four core factors that influence antibiotic seeking for bacteriuria. Participants noted concern for sequelae from untreated bacteria as their primary motivation, but also noted past experiences, information sources, and testing results as themes that affected their mental model surrounding bacteriuria treatment.

CONCLUSIONS

The cognitive approach to care-seeking and treatment preference for bacteriuria is influenced by a few central factors. An improved ability to allay concerns either by provider discussions or educational materials are necessary to bridge the gap from the existence of evidence-based guidelines to patient and provider comfort with adherence to these guidelines.

Comparative genomic analysis of uropathogenic Escherichia coli strains from women with recurrent urinary tract infection

Introduction

Recurrent urinary tract infections (RUTIs) caused by uropathogenic Escherichia coli are costly public health problems impacting patients' quality of life.

Aim

In this work, a comparative genomics analysis of three clinical RUTI strains isolated from bladder biopsy specimens was performed.

Materials and methods

One hundred seventy-two whole genomes of urinary tract E. coli strains were selected from the NCBI database. The search for virulence factors, fitness genes, regions of interest, and genetic elements associated with resistance was manually carried out. The phenotypic characterization of antibiotic resistance, haemolysis, motility, and biofilm formation was performed. Moreover, adherence and invasion assays with human bladder HTB-5 cells, and transmission electron microscopy (TEM) were performed.

Results

The UTI-1_774U and UTI-3_455U/ST1193 strains were associated with the extraintestinal pathotypes, and the UTI-2_245U/ST295 strain was associated with the intestinal pathotype, according to a phylogenetic analysis of 172 E. coli urinary strains. The three RUTI strains were of clinical, epidemiological, and zoonotic relevance. Several resistance genes were found within the plasmids of these strains, and a multidrug resistance phenotype was revealed. Other virulence genes associated with CFT073 were not identified in the three RUTI strains (genes for type 1 and P fimbriae, haemolysin hlyA, and sat toxin). Quantitative adherence analysis showed that UTI-1_774U was significantly (p < 0.0001) more adherent to human bladder HTB-5 cells. Quantitative invasion analysis showed that UTI-2_245U was significantly more invasive than the control strains. No haemolysis or biofilm activity was detected in the three RUTI strains. The TEM micrographs showed the presence of short and thin fimbriae only in the UTI-2_245U strain.

Conclusion

The high variability and genetic diversity of the RUTI strains indicate that are a mosaic of virulence, resistance, and fitness genes that could promote recurrence in susceptible patients.