Empiric Antibiotic Prescribing Research Articles

Risk Factors for Empiric Treatment Failure in US Female Outpatients with Uncomplicated Urinary Tract Infection: an Observational Study.

Treatment failure (TF) in uncomplicated urinary tract infection (uUTI) increases disease burden and risk of antimicrobial resistance. Identification of risk factors for TF could inform empiric treatment decisions and reduce suboptimal outcomes. To evaluate the incidence of TF to empirically prescribed oral antibiotics and identify risk factors for TF in females with uUTI in the United States (US). This retrospective cohort study used Optum's de-identified Electronic Health Record dataset (January 2017-September 2022). Eligible female patients aged ≥ 12years had ≥ 1 diagnosis of urinary tract infection (UTI) in an outpatient ambulatory/emergency department (ED) setting, ≥ 1 empiric oral antibiotic prescription, and no evidence of complicated UTI (cUTI). TF was defined as having a new/repeat oral antibiotic prescription, IV antibiotic administration or acute UTI diagnosis ≤ 28days following initial empiric oral antibiotic prescription​. Risk factors of TF were selected using LASSO and reported using adjusted risk ratios (aRR) and 95% CIs. Of 376,004 patients with uUTI, 62,873 (16.7%) experienced TF. Incidence of TF was highest in patients with history of antibiotic TF (33.9%) or fosfomycin prescription (30.1%). Significant risk factors of TF included ≥ 3 prior antibiotic prescriptions (aRR [95% CI]: 1.60 [1.56-1.64]); fosfomycin prescription (1.60 [1.38-1.86]); uUTI diagnosis in ED (1.49 [1.46-1.52]), Southern US residence (1.37 [1.35-1.40]), age ≥ 75years (1.35 [1.29-1.41]), recurrent UTI (1.12 [1.10-1.14]) and obesity (1.06 [1.04-1.08]). Incidence of TF to empirically prescribed oral antibiotics for uUTI is considerable. Prior infections requiring antibiotic prescription and location of care are key risk factors for TF in female outpatients with uUTI. Knowledge of these TF risk factors can inform shared-decision making and supplement existing guidance on uUTI treatment.

Antibiotic susceptibility of orofacial infections in Bratislava: a 10-year retrospective study

ObjectivesAim of this study was to analyse causal microbiological agents and their bacterial resistance in orofacial infections requiring hospital admission.Materials and methodsPresented is a 10-year retrospective study of patients hospitalised at a single department in 2014–2023. 744 patients were involved. In the statistical analysis, following data was evaluated: causal microbes and their resistance to Penicillin, Amoxicillin-Clavulanate, Clindamycin and Metronidazole.ResultsMost frequent aetiology was odontogenic with causal tooth in socket (n = 468; 62,9%), followed by odontogenic – post extraction (n = 152; 20.4%), jaw fracture (n = 41; 5.5%), sialadenitis n = 31 (4.2%), osteonecrosis n = 22 (3.0%), oncological diagnosis in head and neck (n = 17; 2.3%), unknown (n = 10; 1.3%) and multiple factors (n = 3; 0.4%). 408 patients (54.8%) underwent extraoral abscess revision, 336 patients (45.2%) patients were treated locally without extraoral revision. In odontogenic group with tooth still present, superior CRP (m = 145.8 mg/l; SD = 117.7) and leukocyte values (m = 13.6*109l; SD = 6.6) were observed in comparison to other groups. There were 698 cultivated bacteria in 362 patients. Most frequent bacteria were Streptococci (n = 162; 23.2%), Prevotella (n = 83; 11.2%) and Parvimonas (n = 65; 9.3%). Clindamycin resistance was highest (n = 180 resistant bacteria; 25.8%), followed by Metronidazole (n = 178; 25.5%), Penicillin (n = 107; 15.3%) and Amoxicillin-Clavulanate (n = 34; 4.9%).ConclusionsOrofacial infections in head and neck region are mostly of odontogenic origin with causal tooth still in socket. Causal bacteria show a high antibiotic resistance rate, especially to Clindamycin and Metronidazole.Clinical RelevanceAcquired data will be used to determine guidelines for empirical antibiotic prescription in cases of orofacial infections.

Outcome of Empirical Antibiotic Prescription for the Treatment of Community Acquired Pneumonia

Background: The primary cause of illness and death in Bangladesh is community acquired pneumonia (CAP). Many hospitals in Bangladesh lack the resources to perform sputum cultures and sensitivity tests, making it difficult to identify the etiological agent of an infection. As a result, antibiotics are prescribed on a "empirical basis" rather than as part of a specific anti microbial treatment. The optimal antibiotic for treating CAP should be chosen using an empirical approach. Objective: The purpose of this study is to evaluate the effectiveness of various empirical antibiotic choices in the management of CAP. Methods: Eighty-two patients with CAP were included in this prospective observational research at a tertiary medical college hospital in Bangladesh. Inclusion and exclusion criteria were used to choose patients. Chest x-rays confirmed the diagnosis of CAP. The antibiotic was chosen based on clinical experience, which is an empirical method. The majority of patients received a combination antibiotic, whereas the remaining handful received monotherapy. The result served as an evaluation of the empiricism used in selecting the antibiotic. During the research, data were recorded in standardized formats. SPSS was used for the statistical analysis. Results: A total of 82 people were treated, and of them, 62 (or 76%) were men and 20 (or 24%) were women. The average age was 54.4% (9.6%). The round of antibiotics was supposed to last for a week. There were no unwanted medication reactions. No cases of lung abscess or parenchymal damage to the lungs occurred, and only one patient had paraneumonic effusion. Every single person made a full recovery. Conclusion: In many hospitals in Bangladesh, the choice of antibiotic for treating CAP is made on a "empirical" basis. Selecting an appropriate antibiotic requires better sputum culture and sensitivity testing in hospital labs.

Molecular characterization of superbugs K. pneumoniae harboring extended-spectrum β-lactamase (ESBL) and carbapenemase resistance genes among hospitalized patients in southwestern Iran, Western Asia

BackgroundDetection of K. pneumoniae superbugs carrying Extended-spectrum β-lactamase (ESBL) and Carbapenemase resistance genes among hospitalized patients is crucial for infection control and prevention. The aim of this molecular study was to investigate the spread of ESBL and Carbapenemase-producing K. pneumoniae in two hospitals located in Southwest Iran. MethodsOne hundred clinical isolates of K. pneumoniae were randomly collected from two hospitals over a period of five months, from November 2023. The isolates were confirmed using biochemical and genotypic tests. According to the CLSI 2022 guidelines, K. pneumoniae isolates that exhibited resistance to at least one of the three indicator cephalosporins or carbapenems were selected for evaluation of ESBL and carbapenemase production. This was done using a combination disk confirmatory test and the modified carbapenem inactivation method (mCIM). Finally, the presence of ESBLs and carbapenemase resistance encoding genes was assessed using PCR and specific primers. ResultsOut of the 100 isolates, the percentage of antibiotic resistance was cefoxitin (29 %), cefixime (28 %), ceftazidime (26 %), cefotaxime (24 %), cefepime (22 %), ceftriaxone (21 %), imipenem (20 %), and meropenem (17 %). Additionally, thirty isolated strains were found to be multidrug-resistant. Out of these, twenty-seven strains demonstrated a potential for ESBLs, twenty strains for Carbapenemase, and seventeen strains for both ESBLs and Carbapenemase production. Moreover, the occurrence of ESBLs and carbapenemase genes was as follows: blaSHV (25 %), blaTEM (23 %), blaCTX-M (20 %), blaOXA-48 (17 %), and blaVIM (13 %). It is important to mention that we did not detect the blaIMP and blaKPC. resistant genes among clinical isolates. ConclusionBased on the results, the existence of this type of resistance in hospital centers needs to be reevaluated in terms of empirical antibiotic prescribing. Additionally, it is recommended that infection control measures should be taken for public health. Also, it's suggested that hospital-acquired infections caused by superbug K. pneumoniae resistant strains should be addressed.

Adherence to Empiric Antibiotics Prescription Guidelines in Hospitalized Patients with Pneumonia at Secondary Care Hospitals in Al Jouf Region, Saudi Arabia

Abstract Background: Adherence to therapeutic protocols is essential for the effective treatment of pneumonia, as it contributes to decreased mortality rates, shorter hospital stays, and reduced antibiotic therapy duration. Despite its significance, there remains a high rate of nonadherence to these guidelines worldwide. Presently, no data exist regarding physician adherence to pneumonia management guidelines in the Al Jouf region of Saudi Arabia. Thus, our objective was to evaluate compliance with empirical antibiotic prescription guidelines for patients with pneumonia. Materials and Methods: This retrospective, multicenter, cross-sectional study was conducted from December 2021 to May 2023 in three secondary care hospitals in the Al Jouf region, Saudi Arabia. Data on patients admitted with a diagnosis of pneumonia were extracted from the electronic medical records and pharmacy departments of the hospitals using structured proforma. The results are presented using descriptive statistics as frequencies and percentages. Differences in proportions were compared using a one-sample t-test, with the level of significance set at P < 0.05. Results: A total of 197 patients were studied, with a male-to-female ratio of 0.9:1. Most patients were admitted with nosocomial pneumonia 126/197 (63.9%). Cephalosporins, glycopeptides, and quinolones are the most commonly prescribed classes of antibiotics. Most patients with community-acquired pneumonia (CAP) were prescribed a combination of ceftriaxone and moxifloxacin, whereas most patients with nosocomial pneumonia received meropenem and vancomycin. Adherence to the guidelines was low. A higher adherence to the guidelines was observed in patients with CAP. Conclusion: The study indicated low adherence to guidelines for the management of inpatients with pneumonia in the Al Jouf region, Saudi Arabia.

Appropriateness of Antibiotic Prescriptions in Emergency Departments in the United States, 2016-2021

Background: Inappropriate antibiotic prescribing contributes to antimicrobial resistance, a global health threat. Prior studies have used ICD-9-CM codes to estimate inappropriate prescribing rates in ambulatory settings, including emergency departments (EDs), though the last national estimates date back to 2010-2015 (Hersh et al, CID 2021). Using the most recent publicly available data, we estimated inappropriate antibiotic prescribing rates in EDs across all conditions. For further characterization, we estimated rates of inappropriate antibiotic prescribing with and without codes that could be plausible indications for which antibiotics are prescribed. Methods: We analyzed 2016-2021 data from the National Hospital Ambulatory Medical Care Survey, a nationally representative survey of EDs, subsetting to visits with ≥1 oral antibiotic prescription. Using ICD-10-CM codes (Chua et al, BMJ 2019), we calculated proportions of visits with inappropriate antibiotic prescribing; inappropriate antibiotic prescribing and ≥1 plausible antibiotic-inappropriate indication (e.g., viral infection); and inappropriate prescribing without plausible antibiotic-inappropriate indications. Among visits with plausible antibiotic-inappropriate indications, we subcategorized these further (e.g. viral infection, ophthalmologic conditions). Among visits without plausible antibiotic-inappropriate indications, we determined the most common diagnosis codes. We conducted analyses overall and separately among children (0-17 years), adults (18-64 years), and older adults (≥65 years). Results: Demographic characteristics by age group are shown in Table 1. Antibiotic prescription rates overall and for children, adults, and older adults were 18.6%, 17.8%, 19.1%, and 18.0%, respectively. Inappropriate prescription rates were 27.6%, 23.7%, 29.8%, and 24.6%, respectively. Inappropriate antibiotic prescription rates with plausible indications were 14.9%, 16.7%, 15.0%, and 12.6%, while inappropriate antibiotic prescription rates without plausible indications were 12.7%, 7.0%, 14.9%, and 12.0%, respectively (Figure 1). Rates of subcategories of inappropriate prescribing with plausible antibiotic indications overall and by age group are shown in Figure 2, with the most common diagnoses for potential signs and symptoms of infection in Table 2. The most common diagnoses for inappropriate prescribing without plausible indications are in Table 3. Conclusions: Inappropriate antibiotic prescriptions in EDs are common with a substantial proportion without plausible conditions. Most inappropriate prescriptions with plausible antibiotic-inappropriate indications are associated with potential signs and symptoms of infection without a more definitive diagnosis code, suggesting either diagnostic uncertainty or poor coding quality. Future work should distinguish between these two possibilities to determine whether stewardship efforts should focus on educational strategies to avoid unnecessary empiric antibiotic prescribing in the setting of diagnostic uncertainty, improving coding quality, or both.

Prescribing antibiotics for children with dengue infection in Taiwan: who are at risk and who are high prescribers?

Inappropriate antibiotic use contributes to antimicrobial resistance, a global public health threat. The non-specific manifestations of dengue, itself a growing public health threat, lead to avoidable empiric antibiotic prescription, particularly in children. In this national pooled population-based cross-sectional study, we evaluated child and physician characteristics associated with antibiotics prescription in confirmed dengue cases in Taiwan. Linking national health care insurance claims and reports of confirmed dengue cases from 2008 to 2015, there were 7086 children with confirmed dengue with 21 744 outpatient visits and 2520 inpatient admissions. We assessed the presence of antibiotic prescription in outpatient and inpatient settings separately a week before or after the confirmation date. Logistic regression models with generalized estimating equations were applied to identify patient, practitioner, and other factors associated with antibiotic prescription. A total of 29.4% of children <18 years old with dengue who did not have a concomitant bacterial infection were prescribed antibiotics during the 14-day assessment period. Antibiotics prescription was reduced from 13.5% to 6.3% and from 43.2% to 19.3% in outpatient and inpatient settings, respectively, after dengue was confirmed. Young children were more likely to receive antibiotics. Significant variations in antibiotic prescribing across physicians were observed only in outpatient settings: physicians ≥60 years old and physicians practicing at clinics and in non-urban facilities were more likely to prescribe antibiotics. Antibiotics were less likely to be prescribed during an exceptional 2-year epidemic than in other years. Antibiotic prescribing for dengue, an arboviral infection affecting half of the global population, was shown to occur in 29% of paediatric cases in Taiwan. That potentially avoidable antibiotic consumption could be reduced by improving antibiotic stewardship, informed by understanding the conditions under which antibiotics are prescribed and the availability of prevention strategies for viral diseases, including dengue. We identified a number of such factors in this national population-based study.

Retrospective analysis of pathogens for guided creation of an EMPIRIc antibiotic prEscribing pathway (EMPIRE).

The objective of this study was to evaluate the susceptibilities of pathogens isolated from cultures within the first 7 days of admission to the burn center and in the absence of healthcare-associated infection risk factors (HAIRF) to determine if current empiric antibiotics can be narrowed for refinement of an empiric antibiotic prescribing pathway according to the suspected source. A 3-year sample of patients and cultures was utilized in hopes of obtaining at least 30 isolates of the most common pathogens and their respective susceptibilities. A total of 268 clinically relevant (e.g., deemed infectious, versus colonization) pathogens were included in the final sample with sources including wounds, respiratory, blood, urine, and bone. Of the 268 pathogens included, 45% were Gram-negative and 69% of all pathogens were isolated from wound cultures. The existing empiric pathway, vancomycin plus cefepime, covered 98% and 84% of all Gram-positive and Gram-negative pathogens, respectively. In patients without HAIRF, coverage rose to 98% and 90%, respectively. Initial use of vancomycin and cefepime remains adequate for pathogens isolated within 1 week of admission in patients without HAIRF. For pneumonias, a narrower spectrum beta-lactam would not sufficiently cover respiratory pathogens isolated within the first week of admission. Regarding early wound infections, difficult-to-treat pathogens remain as a rare isolate of wound cultures within 1 week of admission.

Harnessing the Electronic Health Record to Improve Empiric Antibiotic Prescribing

Harnessing the Electronic Health Record to Improve Empiric Antibiotic Prescribing

297 Antibiotic prescribing for inpatients with community-acquired bacterial pneumonia (CABP) due to methicillin-resistant Staphylococcus aureus (MRSA) in the All of Us database: Are there differences by age, sex, race, and ethnicity?

OBJECTIVES/GOALS: The purpose of this work is to assess antibiotic prescribing for inpatients with community-acquired bacterial pneumonia (CABP) due to methicillin-resistant Staphylococcus aureus (MRSA) in the All of Us database. The goal of this research is to determine if different subgroups are more or less likely to receive anti-MRSA antibiotics. METHODS/STUDY POPULATION: This is a retrospective cohort study of inpatients with CABP due to MRSA from 2/1/2011 to 7/1/2022 in the All of Us database. Cases will be excluded for other treatment settings, other pathogens, and other types of pneumonia. Patients will be stratified by age, sex, race, and ethnicity. The proportion of patients who received anti-MRSA antibiotic therapy will be compared within groups with the chi-square statistic. Significant associations between patient characteristics and anti-MRSA prescribing (p &lt; 0.05) will be assessed using multivariate logistic regression, with subgroup as the independent variable, anti-MRSA prescribing as the dependent variable, and divergent baseline characteristics as potential confounders. Odds ratios (OR) and 95% confidence intervals (95% CI) will be calculated. RESULTS/ANTICIPATED RESULTS: Previous research by our group has demonstrated differences in guideline-concordant, empiric antibiotic prescribing, for inpatients with CABP in the All of Us database; however, guideline-concordant empiric antibiotics for CABP do not routinely cover for MRSA. Anti-MRSA antibiotics are recommended if the patient has known MRSA or risk factors for MRSA. Investigations of disparity in anti-MRSA prescribing have been limited, especially since the abandonment of the healthcare-associated pneumonia (HCAP) categorization. Since the All of Us database contains information on CABP pathogens, we can study sub-types of CABP; therefore, we now hypothesize that the proportion of inpatients who received anti-MRSA antibiotics for CABP, due to MRSA, in the All of Us database, will differ by age, race, sex, and ethnicity. DISCUSSION/SIGNIFICANCE: This is one of the first studies to evaluate antibiotic prescribing for CABP due to MRSA in the All of Usdatabase. Identifying and understanding differences in care, such as possible discrepancies in anti-MRSA prescribing by age, sex, race, or ethnicity, is essential to develop targeted interventions to address disparities in health outcomes.

Bacteriological profile and antibiotic susceptibility pattern of neonatal septicemia in a tertiary care hospital

ABSTRACT Background: Among the various reasons for neonatal mortality, septicemia continues to be a major cause of neonatal morbidity and mortality worldwide. Incidence varies from country to country, but it is much higher in developing countries than in developed countries. In India, the incidence of blood culture-proven sepsis was reported as 8.5 per 1000 live births. The bacteriological profile for causative organisms of neonatal sepsis differs significantly between developed and developing countries. Klebsiella pneumoniae is the most common bacterial agent in developing countries. This study was undertaken to determine the common bacterial agents causing neonatal sepsis from the tertiary care hospital and their antibiotic susceptibility and resistance. Methods: About 150 blood samples of suspected cases of neonatal septicemia admitted in NICU. Bacterial identification and speciation were done by standard laboratory procedures. Isolates and susceptibility were performed on Automation system. Results: Ninety-one babies presented within the first 72 h of life constituting early-onset sepsis, whereas 59 presented as late-onset sepsis. Among the 150 samples, blood culture was positive in 47 samples. Out of 47 culture-positive cases, 27 (58%) were Gram-negative bacilli, 18 (38%) were Gram-positive cocci, and two (4%) were fungal isolate. K. pneumoniae was the most commonly isolated Gram-negative bacilli. Conclusion: Neonatal septicemia is a life-threatening emergency and rapid treatment with antibiotics is mandatory for favorable outcomes. There is also a need for regular periodic surveillance of the causative organisms of neonatal sepsis as well as their antibiotic susceptibility patterns to inform the choice of empirical antibiotic prescription while awaiting blood culture results.

Exploring stakeholders’ perspectives on antibiogram use, development, and implementation in residential aged care settings

BackgroundKnowledge of local antibiotic resistance data provided by antibiograms (cumulative-antimicrobial-susceptibility-tests) can assist prescribers to make appropriate empirical antibiotic choices. ObjectiveThis study explored the perceptions and knowledge of key stakeholders about the role of antibiograms in residential aged care facilities (RACF), and to understand barriers and enablers of antibiogram development and implementation in this setting. MethodSemi-structured interviews were conducted with aged-care health professionals (‘end-users’) and antibiogram content experts. This study was conducted in Queensland, Australia in 2023. Using qualitative techniques, framework thematic analysis was used to identify themes, which were mapped to the ‘Integrated Promoting Action on Research Implementation in Health Services’ framework constructs. ResultsTwenty interviews were conducted comprising of five ‘content-experts’ and fifteen ‘end-users’. Five themes were identified which indicated lack of knowledge about how to use antibiograms, and its availability. Potential insufficient data was the primary issue identified by content experts with regards to feasibility of annual antibiograms. Pragmatic solutions were offered, such as pooling pathology data from facilities in the same geographical location, extending antibiogram data to two-or three-yearly, or utilising local hospital antibiograms. Presenting antibiogram data in a mode and format suiting preferences of individual users would encourage uptake and improve usability. Antimicrobial stewardship (AMS) champions and pharmacists were highlighted as drivers of educating and promoting antibiogram use. ConclusionClinicians recognised the potential role of antibiograms in improving empirical antibiotic prescribing choices. Establishing their baseline knowledge provides an essential starting point for the education needs of this group. This study provides practical recommendations regarding the presentation of antibiograms to ensure appropriate use and uptake as an AMS tool in RACFs. Pragmatic solutions suggested to overcome challenges of antibiogram development for RACFs should be applied and evaluated to determine feasibility of RACF-specific antibiograms.

Study of Empiric Antibiotic Prescription Patterns and Microbiological Isolates in Hemodynamically Stable and Unstable ICU Patients With Community-Acquired Sepsis.

Background: The efficacy of combination empiric antibiotic therapy for all intensive care unit (ICU) patients with community-acquired sepsis is a subject of ongoing debate in the era of increasing antibiotic resistance. This study was conducted to evaluate the patterns of antibiotic usage and microbial resistance in sepsis patients admitted to the ICU with both hemodynamically stable (HS) and unstable states and to analyze their clinical outcomes. Methods: In this observational study, patients aged 18 years and above who received antibiotics upon admission and had a culture report were included. These patients were categorized into the following groups: HS and hemodynamically unstable (HU), single or combined antibiotics group (more than one antibiotic used empirically to cover one or more groups of organisms), culture-positive and culture-negative group. The microbiological isolates were grouped according to their identified resistance patterns. The outcome parameters involved assessing the differences in empiric antibiotics use upon admission and microbial resistance with hemodynamic stability and investigating any associations with ICU and hospital outcomes. Results: The study included a total of 2675 patients, of which 70.3% were in the HS group, and 29.7% in the HU group. The use of combination antibiotics was significantly higher (p < 0 .0001) across all groups. Carbapenems were used more frequently in the single antibiotic group (p < 0 .001). The culture was positive in 27.8% (n = 747) of patients. A significantly higher number of patients in the HU group (p < 0 .001) were found to have carbapenem-resistant and multidrug-resistant organisms. The ICU and hospital mortality rates were significantly higher in the HU group (p < 0 .001), the culture-positive group with resistance (p < 0 .001), and the HS patients who received combination antibiotics. Conclusion: The usage of combination antibiotics, coupled with the presence of resistant organisms, emerged as an important variable in predicting ICU and hospital mortality rates in cases of community-acquired sepsis.

Application of the Weighted-Incidence Syndromic Combination Antibiogram (WISCA) to guide the empiric antibiotic treatment of febrile neutropenia in oncological paediatric patients: experience from two paediatric hospitals in Northern Italy

BackgroundGuidelines about febrile neutropenia in paediatric patients are not homogeneous; the best empiric treatment of this condition should be driven by local epidemiology. The Weighted-Incidence Syndromic Combination Antibiogram (WISCA) addresses the need for disease-specific local susceptibility evidence that could guide empiric antibiotic prescriptions based on outcome estimates of treatment regimens obtained as a weighted average of pathogen susceptibilities. This study developed a WISCA model to inform empirical antibiotic regimen selection for febrile neutropenia (FN) episodes in onco-haematological paediatric patients treated at two Italian paediatric tertiary centres.MethodsWe included blood cultures from patients with a bloodstream infection and neutropenia admitted to the Paediatric Haematology-Oncology wards in Padua and Genoa Hospitals from 2016 to 2021. WISCAs were developed by estimating the coverage of 20 antibiotics as monotherapy and of 21 combined regimens with a Bayesian probability distribution.ResultsWe collected 350 blood cultures, including 196 g-negative and 154 g-positive bacteria. Considering the most used antibiotic combinations, such as piperacillin–tazobactam plus amikacin, the median coverage for the pool of bacteria collected in the study was 78%. When adding a glycopeptide, the median coverage increased to 89%, while the replacement of piperacillin–tazobactam with meropenem did not provide benefits. The developed WISCAs showed that no monotherapy offered an adequate coverage rate for the identified pathogens.ConclusionsThe application of WISCA offers the possibility of maximizing the clinical utility of microbiological surveillance data derived from large hospitals to inform the choice of the best empiric treatment while contributing to spare broad-spectrum antibiotics.

The impact of the FilmArray meningitis/encephalitis panel on empiric antibiotic prescriptions in patients with suspected community-acquired meningitis

The impact of the FilmArray meningitis/encephalitis panel on empiric antibiotic prescriptions in patients with suspected community-acquired meningitis

Evaluating empiric antibiotic prescribing for hospitalized children in Mozambique through the introduction of a quarterly syndromic antibiogram: An implementation science protocol.

Antimicrobials are the most frequently prescribed drug in pediatrics, with an estimated 37% of infants and 61% of hospitalized children having received them. Approximately 20-50% of prescriptions have been shown to be potentially unnecessary or inappropriate. The World Health Organization (WHO) estimates that the continued increase in antimicrobial resistance by the year 2050 will lead to the death of 10 million people per year. This paper describes a protocol to be used in a future study to evaluate the implementation of a quarterly syndromic antibiogram, aimed to improve the use of antibiotics for the treatment of pediatric bacterial infections at the Maputo Central Hospital, Mozambique. This study uses implementation science methods framed by the Dynamic Adaption Process (DAP) and RE-AIM conceptual frameworks to develop a multi-phase, mixed-methods evaluation utilizing qualitative and quantitative approaches. The pediatric inpatient services at HCM consist of approximately 18 physicians and 60 nurses. Additionally, the microbiology laboratory consists of eight laboratory technicians. We anticipate analyzing approximately 9,000 medical records. Qualitative methods include in-depth interviews with clinicians, laboratory technicians, and administrators to explore current knowledge and practices around antibiotic decision making, facilitators and barriers to intervention implementation, as well as acceptability and satisfaction with the intervention roll-out. Qualitative analysis will be performed with NVivo 12 software. Quantitative methods include extracting data from existing records from the pediatric ward of Hospital Central de Maputo (HCM) guided by the RE-AIM framework to explore intervention utilization and other factors influencing its implementation. Quantitative descriptive and inferential statistical analysis will be performed using R Studio statistical software. The findings from this evaluation will be shared with hospital administrators and relevant national policymakers and may be used by the Ministry of Health in deciding to expand this approach to other hospitals. The expected results of this research include the development of standard operating guidelines for the creation, distribution, and use of a quarterly syndromic antibiogram for antibiotic decision making that is informed by local epidemiology. Findings from this study will be used to develop a larger multi-site trial in Mozambique.

Syndromic Antibiograms and Nursing Home Clinicians’ Antibiotic Choices for Urinary Tract Infections

Empirical antibiotic prescribing in nursing homes (NHs) is often suboptimal. The potential for antibiograms to improve empirical antibiotic decision-making in NHs remains poorly understood. To determine whether providing NH clinicians with a urinary antibiogram improves empirical antibiotic treatment of urinary tract infections (UTIs). This was a survey study using clinical vignettes. Participants were recruited via convenience sampling of professional organization listservs of NH clinicians practicing in the US from December 2021 through April 2022. Data were analyzed from July 2022 to June 2023. Respondents were randomized to complete vignettes using a traditional antibiogram (TA), a weighted-incidence syndromic combination antibiogram (WISCA), or no tool. Participants randomized to antibiogram groups were asked to use the antibiogram to empirically prescribe an antibiotic. Participants randomized to the no tool group functioned as controls. Empirical antibiotic selections were characterized as microbiologically (1) active and (2) optimal according to route of administration and spectrum of activity. Of 317 responses, 298 (95%) were included in the analysis. Duplicate responses (15 participants), location outside the US (2 participants), and uninterpretable responses (2 participants) were excluded. Most respondents were physicians (217 respondents [73%]) and had over 10 years of NH practice experience (155 respondents [52%]). A mixed-effects logistic model found that use of the TA (odds ratio [OR], 1.41; 95% CI, 1.19-1.68; P < .001) and WISCA (OR, 1.54; 95% CI, 1.30-1.84; P < .001) were statistically superior to no tool when choosing an active empirical antibiotic. A similarly constructed model found that use of the TA (OR, 1.94; 95% CI, 1.42-2.66; P < .001) and WISCA (OR, 1.7; 95% CI, 1.24-2.33; P = .003) were statistically superior to no tool when selecting an optimal empirical antibiotic. Although there were differences between tools within specific vignettes, when compared across all vignettes, the TA and WISCA performed similarly for active (OR, 1.09; 95% CI, 0.92-1.30; P = .59) and optimal (OR, 0.87; 95% CI, 0.64-1.20; P = .69) antibiotics. Providing NH clinicians with a urinary antibiogram was associated with selection of active and optimal antibiotics when empirically treating UTIs under simulated conditions. Although the antibiogram format was not associated with decision-making in aggregate, context-specific effects may have been present, supporting further study of syndromic antibiograms in clinical practice.

Antimicrobial resistance patterns and empiric antibiotic selections for patients admitted from post-acute care facilities.

To characterize the susceptibilities of positive bacterial cultures and the appropriateness of empiric antimicrobial regimens for patients admitted from post-acute care facilities (PACFs). This was a retrospective quality improvement study. The study included patients admitted from a PACF to one of 2 tertiary care teaching hospitals within the University of Pennsylvania Health System, located in Philadelphia, PA, from August 2020 to December 2021. Patients were included if they had at least one positive culture within 72 hours of admission. A total of 167 patients and 230 isolates from the study period were evaluated. The majority of positive cultures were from a urinary source (114 of 230, 49.6%). Nineteen patients (11.4%) had a history of multidrug-resistant organisms. The most common empiric antibiotics used were vancomycin (61.7%) and cefepime (59.3%). Sixty-one patients (36.5%) received inappropriate empiric therapy based on the culture results. When comparing our hospitals' general antibiogram to that of only PACF patients, Escherichia coli and Klebsiella pneumoniae had at least a 20% difference in susceptibility to levofloxacin, ceftriaxone, and cefepime. Extended-spectrum β-lactamase resistance was also higher in the PACF cohort (odds ratio, 2.09; 95% confidence interval, 1.4-3.1). Clinically significant differences in antimicrobial susceptibility were found among patients admitted from PACFs compared to our health system's general antibiogram. The increased resistance rates identified in this study support the need for hospitals to evaluate this at-risk patient population, which may drive changes to empiric antibiotic prescribing practices.

Abstract 327: Implementation of Bronchoalveolar Lavages as a Quality Improvement Initiative in Out-of-Hospital Cardiac Arrest Patients

Patients who suffer OHCA are at risk for early onset pneumonia due to loss of airway protection, emergency airway access and intubation, CPR, mechanical ventilation, among other complications. It is difficult to accurately diagnose early onset pneumonia post OHCA due to multi-organ dysfunction post arrest and radiography findings confounded by non-infectious inflammation from CPR and aspiration. As a result, a substantial number of patients receive empiric antibiotics. A bronchoalveolar lavage (BAL) can screen for the presence of bacteria in the lungs and aid in identifying the incidence of early onset pneumonia after OHCA. We implemented a quality improvement (QI) initiative to collect a BAL on initial patient presentation to our hospital in May 2018. We conducted an observational, retrospective study to assess the impact of BAL implementation on empiric antibiotic prescribing. We used a rigorous study definition of pneumonia requiring at least two of the following positive within the same 24-hour period: BAL, chest radiography, and/or a fever &gt;38°C. We compared rates of antibiotic prescription in the first 7 days of hospitalization for patients receiving a BAL to those without, as well as rates of antibiotic prescriptions before and after implementation of the BAL QI initiative. Implementation of initial BAL collection was successful and resulted in a 66% increase of BALs (from 44 to 73 BALs) collected compared to an average from the prior 2 years. We hypothesized rates of antibiotic prescription would decrease post-implementation of BAL collection; however, there was no statistically significant change in rate of antibiotic prescription (Figure 1) over the initial 7-day hospitalization period X 2 ( Df = 1, N = 3247) = 0.68, p = 0.54. Over 80% of patients with pneumonia received antibiotics, roughly 60% of OHCA patients received antibiotics despite no pneumonia diagnosis by any definition. Further study is needed to alter these practices and reduce antibiotic overuse.

Why local antibiotic resistance data matters – Informing empiric prescribing through local data collation, app design and engagement in Zambia

BackgroundControl of antimicrobial resistance (AMR) relies on local knowledge and local intervention implementation. Effective antibiotic stewardship requires locally-suitable prescribing guidelines. We aimed to use a novel digital tool (the ZARIApp) and a participatory approach to help develop locally-relevant empiric antibiotic prescribing guidelines for two hospitals in Lusaka, Zambia. MethodsWe produced an AMR report using samples collected locally and routinely from adults within the prior two years (April 2020 – April 2022). We developed the ZARIApp, which provides prescribing recommendations based on local resistance data and antibiotic prescribing practices. We used qualitative evaluation of focus group discussions among healthcare professionals to assess the feasibility and acceptability of using the ZARIApp and identify the barriers to and enablers of this stewardship approach. ResultsResistance prevalence was high for many key pathogens: for example, 73% of 41 Escherichia coli isolates were resistant to ceftriaxone. We identified that high resistance rates were likely due to low levels of requesting and processing of microbiology samples from patients leading to insufficient and unrepresentative microbiology data. This emerged as the major barrier to generating locally-relevant guidelines. Through active stakeholder engagement, we modified the ZARIApp to better support users to generate empirical antibiotic guidelines within this context of unrepresentative microbiology data. Qualitative evaluation of focus group discussions suggested that the resulting ZARIApp was useful and easy to use. New antibiotic guidelines for key syndromes are now in place in the two study hospitals, but these have substantial residual uncertainty. ConclusionsTools such as the free online ZARIApp can empower local settings to better understand and optimise how sampling and prescribing can help to improve patient care and reduce future AMR. However, the usability of the ZARIApp is severely limited by unrepresentative microbiology data; improved routine microbiology surveillance is vitally needed.