Prescribing antibiotics: the use of diagnostic tests in general practice. A register-based study

Introducing Point-of-Care PCR technology in general practice: Ambiguities, experiences, and perceptions among health care professionals

In this paper we present findings from a qualitative ethnographic study investigating the experiences and perceptions of general practitioners and other practice staff when introducing a new point of care diagnostic test technology (point of care polymerase chain reaction (POC PCR)) in general practice in Denmark. The ethnographic study was conducted in five general practice clinics, involving observations in four of the clinics and interviews with general practitioners and practice staff in all five clinics. Following an initial analytic phase in which barriers and facilitators in the implementation process of the Point-of-Care test were identified, we developed theoretically informed themes, drawing upon Hartmut Rosa's social theory of technological acceleration. These themes included ambiguous experiences and perceptions of: (i) diagnostic specification and inflation embedded in diagnostic practices; (ii) empowerment and erosion of professional judgment; (iii) strategies of security and insecurity in communication; (iv) the interdependence between professional autonomy and economic structures associated with organizational power; and (v) subjective and organizational time. We discuss how diagnostic technologies simultaneously contribute to and disrupt treatment safety, efficiency, and medical decision-making. Using Rosa's sociological concepts of alienation and resonance, this article furthermore explores how these ambiguous dynamics are experienced in general practice settings. It also examines the implications of navigating a heterogeneous socio-technical and medical landscape and what it means to be a health professional in a contemporary general practice environment that is increasingly shaped by diagnostic technologies.

Factors influencing antibiotic prescribing for respiratory tract infections in primary care - a comparison of physicians with different antibiotic prescribing rates

BACKGROUND

There has been a notable decrease in antibiotic prescribing in the last thirty years in Sweden. Little is known about factors influencing antibiotic prescribing over several years.

OBJECTIVE

To compare primary care physicians who, over time, reduced their antibiotic prescribing for respiratory tract infections with those who remained either high or low prescribers regarding potentially influencing factors.

DESIGN AND SETTING

A register-based study including all RTI visits in primary care in Region Kronoberg, Sweden 2006-2014. The data were divided into three 3-year periods.

SUBJECTS

The data comprised all physicians who had diagnosed at least one RTI for each of the three-year periods. The antibiotic prescribing rate adjusted for the patients' sex and age group was calculated for each physician and period, and based on the change between the first and the third period, the physicians were divided into three prescriber groups: The High Prescribing Group, the Decreasing Prescribing Group, and the Low Prescribing Group.

MAIN OUTCOME MEASURES

For the three prescriber groups, we compared factors influencing antibiotic prescribing such as the characteristics of the physicians, their use of point-of-care tests, their choice of diagnoses, and whether the patients returned and received antibiotics.

RESULTS

The High Prescribing Group ordered more point-of-care tests, registered more potential bacterial diagnoses, prescribed antibiotics at lower C-reactive protein levels, and prescribed antibiotics more often despite negative group A Streptococci test than in the Low Prescribing Group. The Decreasing Prescribing Group was between the High Prescribing Group and the Low Prescribing Group regarding these variables. The lower prescription rate in the Low Prescribing Group did not result in more return visits or new antibiotic prescriptions within 30 days.

CONCLUSION

Point-of-care testing and its interpretation differed between the prescriber groups. Focus on interpreting point-of-care test results could be a way forward in antibiotic stewardship.

Management of uncomplicated urinary tract infection in the post-antibiotic era: select non-antibiotic approaches

BACKGROUND

Given the high frequency of patients presenting with urinary tract infections (UTIs) and the ensuing high degree of antibiotic prescription, UTI is a critical point of intervention for non-antibiotic treatments to curb the further development of antimicrobial resistance and provide risk-appropriate care for patients.

OBJECTIVES

To highlight several select non-antibiotic therapies for the treatment of uncomplicated UTI and relevant indications (prevention and complicated UTI) from recent literature.

SOURCES

PubMed, Google Scholar, and clinicaltrials.gov were searched for clinical trials published in the English language corresponding to non-antibiotic treatments for UTI.

CONTENT

The focus of this narrative review centres on a limited number of non-antibiotic therapies for the treatment of UTI based on (a) herbal extracts or (b) antibacterial strategies (e.g. bacteriophage therapy and D-mannose). The experience of treatment with non-steroidal anti-inflammatory drugs is also used to fuel discussion on the risk of developing pyelonephritis without antibiotics-compared with the projected harms of continuing their widespread use.

IMPLICATIONS

Non-antibiotic treatment strategies for UTI have shown varying results in clinical trials, and the current evidence does not yet indicate a clear, better alternative to antibiotics. However, the collective experience with non-antibiotic treatments suggests that there is a need to weigh the actual benefits/risks of unfettered, non-culture-confirmed antibiotic use in uncomplicated UTI. Given the different mechanisms of action of proposed alternatives, more in-depth knowledge on microbiological and pathophysiological factors influencing UTI susceptibility and prognostic indicators are highly needed to stratify patients most likely to benefit. The feasibility of alternatives in clinical practice should also be considered.

Impact of improving infection control and antibiotic stewardship practices on nosocomial infections and antimicrobial resistance in an oncology centre from India

BACKGROUND

Improving basic infection control (IC) practices, diagnostics and anti-microbial stewardship (AMS) are key tools to handle antimicrobial resistance (AMR).

MATERIALS AND METHODS

This is a retrospective study done over 6 years (2016-2021) in an oncology centre in North India with many on-going interventions to improve IC practices, diagnostics and AMS. This study looked into AMR patterns from clinical isolates, rates of hospital acquired infections (HAI) and clinical outcomes.

RESULTS

Over all, 98,915 samples were sent for culture from 158,191 admitted patients. Most commonly isolated organism was E. coli (n ​= ​6951; 30.1%) followed by Klebsiella pneumoniae (n ​= ​5801; 25.1%) and Pseudomonas aeroginosa (n ​= ​3041; 13.1%). VRE (Vancomycin resistant Enterococcus) rates fell down from 43.5% in Jan-June 2016 to 12.2% in July-Dec 2021, same was seen in CR (carbapenem resistant) Pseudomonas (23.0%-20.6%, CR Acinetobacter (66.6%-17.02%) and CR E. coli (21.6%-19.4%) over the same study period. Rate of isolation of Candida spp. from non-sterile sites also showed reduction (1.68 per 100 patients to 0.65 per 100 patients). Incidence of health care associated infections also fell from 2.3 to 1.19 per 1000 line days for CLABSI, 2.28 to 1.88 per 1000 catheter days for CAUTI. There was no change in overall mortality rates across the study period.

CONCLUSION

This study emphasizes the point that improving compliance to standard IC recommendations and improving diagnostics can help in reducing the burden of antimicrobial resistance.

Novel Host Response-Based Diagnostics to Differentiate the Etiology of Fever in Patients Presenting to the Emergency Department

Fever is a common presentation to urgent-care services and is linked to multiple disease processes. To rapidly determine the etiology of fever, improved diagnostic modalities are necessary. This prospective study of 100 hospitalized febrile patients included both positive (FP) and negative (FN) subjects in terms of infection status and 22 healthy controls (HC). We evaluated the performance of a novel PCR-based assay measuring five host mRNA transcripts directly from whole blood to differentiate infectious versus non-infectious febrile syndromes as compared to traditional pathogen-based microbiology results. The FP and FN groups observed a robust network structure with a significant correlation between the five genes. There were statistically significant associations between positive infection status and four of the five genes: IRF-9 (OR = 1.750, 95% CI = 1.16-2.638), ITGAM (OR = 1.533, 95% CI = 1.047-2.244), PSTPIP2 (OR = 2.191, 95% CI = 1.293-3.711), and RUNX1 (OR = 1.974, 95% CI = 1.069-3.646). We developed a classifier model to classify study participants based on these five genes and other variables of interest to assess the discriminatory power of the genes. The classifier model correctly classified more than 80% of the participants into their respective groups, i.e., FP or FN. The GeneXpert prototype holds promise for guiding rapid clinical decision-making, reducing healthcare costs, and improving outcomes in undifferentiated febrile patients presenting for urgent evaluation.

Factors associated with C-reactive protein testing when prescribing antibiotics in general practice: a register-based study

BACKGROUND

The use of C-reactive protein (CRP) tests has been shown to safely reduce antibiotic prescribing for acute respiratory tract infections (RTIs). The aim of this study was to explore patient and clinical factors associated with the use of CRP testing when prescribing antibiotics recommended for RTIs.

METHODS

A nation-wide retrospective cross-sectional register-based study based on first redeemed antibiotic prescriptions issued to adults in Danish general practice between July 2015 and June 2017. Only antibiotics recommended for treatment of RTIs were included in the analysis (penicillin-V, amoxicillin, co-amoxicillin or roxithromycin/clarithromycin). Logistic regression models were used to estimate odds ratios for patient-related and clinical factors on performing a CRP test in relation to antibiotic prescribing.

RESULTS

A total of 984,149 patients redeemed at least one antibiotic prescription during the two-year period. About half of these prescriptions (49.6%) had an RTI stated as the indication, and a CRP test was performed in relation to 45.2% of these scripts. Lower odds of having a CRP test performed in relation to an antibiotic prescription was found for patients aged 75 years and above (OR 0.82, 95CI 0.79-0.86), with a Charlson Comorbidity Index of more than one (OR 0.93, 95CI 0.91-0.95), unemployed or on disability pension (OR 0.84, 95CI 0.83-0.85) and immigrants (OR 0.91, 95CI 0.88-0.95) or descendants of immigrants (OR 0.90, 95CI 0.84-0.96). Living with a partner (OR 1.08, 95CI 1.07-1.10), being followed in practice for a chronic condition (OR 1.22, 95CI 1.18-1.26) and having CRP tests performed in the previous year (OR 1.78, 95CI 1.73-1.84) were associated with higher odds of CRP testing in relation to antibiotic prescribing.

CONCLUSIONS

Differences were observed in the use of CRP tests among subgroups of patients indicating that both sociodemographic factors and comorbidity influence the decision to use a CRP test in relation to antibiotic prescriptions in general practice. Potentially, this means that the use of CRP tests could be optimised to increase diagnostic certainty and further promote rational prescribing of antibiotics. The rationale behind the observed differences could be further explored in future qualitative studies.