Does treatment of urinary tract infections reflect the antibiotic stewardship program guidelines?

Influence of bacterial morphotype on urine culture and molecular epidemiological differences in Escherichia coli harboring bacterial morphotype-induced urinary tract infections

Bacteria that adhere to epithelial cells, form intracellular bacterial communities (IBCs), or transition to filamentous forms are referred to as morphotype-positive bacteria. Escherichia coli (E. coli) with this morphotype plays a critical role in urinary tract infections (UTIs), yet its impact on urine culture outcomes and molecular epidemiological characteristics remains unclear. In this retrospective study, we assessed the effect of bacterial morphotype on urine culture results and investigated the molecular differences between E. coli strains with and without this morphotype, using PCR and whole genome sequencing (WGS). We observed that E. coli with the morphotype-positive phenotype frequently appeared in urine sediments, leading to fewer colony-forming units (CFUs) in culture and contributing to false-negative results. However, vortexing the urine samples significantly increased CFUs, improving culture sensitivity. Additionally, E. coli with the positive morphotype carried more adhesion-related virulence genes (VGs), with the majority belonging to phylogenetic group B2. Whole genome sequencing further revealed a broader array of virulence genes in these strains. Our findings demonstrate that vortexing is an effective method to enhance urine culture positivity by releasing intracellular bacteria, and that morphotype-positive E. coli harbors a diverse set of virulence factors, indicating their potential high pathogenicity. These results highlight the importance of detecting bacterial morphotypes in urine samples for accurate UTI diagnosis and emphasize the need for increased attention to these highly virulent strains.

IMPORTANCE

Uropathogenic Escherichia coli (UPEC) is widely acknowledged as the primary pathogen responsible for urinary tract infections (UTIs). Following adherence to the epithelium, UPEC undergoes periodic morphological changes, such as filamentation, which not only contribute to immune evasion but also lead to false-negative results. This study focuses on three transient stages of UPEC morphological changes: adherence to the epithelium, formation of intracellular bacterial communities (IBCs), and the presence of filamentous UPEC. Any one of these characteristics is acceptable to classify UPEC strains as morphotype-positive UPEC. This study reported the prevalence of UPEC with the bacterial morphotype and established a direct relationship between urine culture and bacterial morphotype. The molecular epidemiological distinctions were both revealed. These findings provide further evidence of the necessary for bacterial morphotype detection, and greater attention should be given to E. coli harboring this bacterial morphotype.

Please mind the gap between guidelines & behavior change: A systematic review and a consideration on effectiveness in healthcare

BACKGROUND & OBJECTIVE

This systematic review evaluates the impact of guidelines on healthcare professionals' behavior and explores the resulting outcomes.

METHODS

Using PRISMA methodology, Scopus and Web of Science databases were searched, yielding 624 results. After applying inclusion criteria, 67 articles were selected for in-depth analysis.

RESULTS

The studies focused on key clusters: Target behaviors, Effectiveness, Research designs, Behavioral frameworks, and Publication outlets. Prescription behavior was the most studied (58.2 %), followed by other health-related behaviors (31.3 %) and hygiene practices (10.4 %). Significant behavior changes were reported in 46.3 % of studies, with 17.9 % showing negative effects, and 22.4 % reporting mixed results. Quantitative methods dominated (56.8 %), while qualitative methods (19.4 %) and review designs (13.4 %) were less common. Theoretical Domain Framework (TDF) and Behavior Change Wheel (BCW) were frequently used frameworks, with the UK and the USA contributing most studies. Medical doctors (44.8 %) were the primary participants, followed by general healthcare providers (37.3 %).

CONCLUSIONS

The study highlights the varied effectiveness of guidelines, with prescription behavior being the most investigated. Guidelines influenced behavior positively in less than half of the cases, and doctors were the primary focus, rather than nurses. The complexity of interventions suggests a need for further research to develop more effective behavioral interventions and to standardize methodological approaches to reduce clinical variation in healthcare.

Urinary Tract Infections in Long-term Care: Evaluation of Uropathogens, Antibiotic Susceptibility, and Empiric Treatment

Objective To devise a residential empiric treatment algorithm, describe common uropathogens associated with urinary tract infections (UTIs) in residential care, assess all-pathogen and non-ESBL (extended-spectrum beta-lactamase) Escherichia coli antibiotic susceptibilities, and report the percentage of antibiotic use. Design A retrospective chart review of 198 residents with positive urine cultures from September 2019 to September 2020. Setting Institutional long-term care facility. Participants The exclusion criteria were negative urine culture, mixed organisms on urine culture, no antibiotic treatment, signs and symptoms of systemic infection, hospitalization because of systemic infection, and intravenous antibiotic treatment. The entire population was screened. Results The most prevalent pathogens were non-ESBL E. coli (29%), Proteus mirabilis (12%), Klebsiella pneumoniae (8%), and ESBL E. coli (8%). All-pathogen susceptibilities were 79.6% (amoxicillin/clavulanate), 64.1% (nitrofurantoin), 50.5% (sulfamethoxazole/trimethoprim), 43.7% (cephalexin), 42.7% (amoxicillin), and 41.8% (ciprofloxacin). Amoxicillin/clavulanate (96.7%), nitrofurantoin (90.0%) and sulfamethoxazole/trimethoprim (83.3%) demonstrated the highest non-ESBL E. coli susceptibilities. Nitrofurantoin was the most prescribed antibiotic (21%), followed by amoxicillin/clavulanate (19%) and ciprofloxacin (17%). Conclusion Based on the data, amoxicillin/clavulanate and nitrofurantoin are appropriate first-line options for empiric treatment of symptomatic cystitis in this long-term care facility, with sulfamethoxazole/trimethoprim as an alternative. Ciprofloxacin was overprescribed despite its low susceptibilities to commonly encountered pathogens, which emphasizes the need for a UTI empiric treatment algorithm tailored towards residential care.

Nursing Staff's Role in Detecting Urinary Tract Infections in Nursing Homes: An Integrative Review

Despite evidence-based protocols, inappropriate antibiotic use still presents a systemic global threat to health care in nursing homes (NHs). Nursing staff are responsible for recognizing signs and symptoms that may indicate urinary tract infections (UTIs). The current integrative review was designed to examine the state of the literature related to the role of nursing staff in UTI identification and care in NHs. This review, which includes 19 articles published between 2011 and 2020, identified that, although prescribers are the experts in UTI management, nursing staff in NHs were the individuals who recognized changes and communicated residents' needs to prescribers. Further research is required to understand nursing staff's decision making and unique perspectives and determine if evidence-based protocols align with current practice in the NH setting. [Journal of Gerontological Nursing, 48(5), 43-50.].