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Clinical Microbiology and Infection :... Apr 2024Centor and McIsaac scores are clinical prediction rules for diagnosing group A streptococcus (GAS) infection in patients with pharyngitis. Their recommended thresholds... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Centor and McIsaac scores are clinical prediction rules for diagnosing group A streptococcus (GAS) infection in patients with pharyngitis. Their recommended thresholds vary between guidelines.
OBJECTIVES
To estimate the sensitivity and specificity of the McIsaac and Centor scores to diagnose GAS pharyngitis and evaluate their impact on antibiotic prescribing at each threshold in patients presenting to secondary care.
DATA SOURCES
MEDLINE, Embase, and Web of Science were searched from inception to September 2022.
STUDY ELIGIBILITY CRITERIA
Studies of patients presenting with acute pharyngitis to emergency or outpatient clinics that estimated the accuracy of McIsaac or Centor scores against throat cultures and/or rapid antigen detection tests (RADT) as reference standards.
TESTS
Centor or McIsaac score.
REFERENCE STANDARD
Throat cultures and/or RADT.
ASSESSMENT OF RISK OF BIAS
Quality Assessment of Diagnostic Accuracy Studies.
METHODS OF DATA SYNTHESIS
The sensitivities and specificities of the McIsaac and Centor scores were pooled at each threshold using bivariate random effects meta-analysis.
RESULTS
Fourteen studies were included (eight McIsaac and six Centor scores). Eight studies had unclear and six had a high risk of bias. The McIsaac score had higher estimated sensitivity and lower specificity relative to Centor scores at equivalent thresholds but with wide and overlapping confidence regions. Using either score as a triage to RADT to decide antibiotic treatment would reduce antibiotic prescription to patients with non-GAS pharyngitis relative to RADT test for everyone, but also reduce antibiotic prescription to patients with GAS.
DISCUSSION
Centor and McIsaac scores are equally ineffective at triaging patients who need antibiotics presenting with pharyngitis at hospitals. At high thresholds, too many true positive cases are missed, whereas at low thresholds, too many false positives are treated, leading to the over prescription of antibiotics. The former may be compensated by adequate safety netting by clinicians, ensuring that patients can seek help if symptoms worsen.
Topics: Humans; Secondary Care; Streptococcal Infections; Pharyngitis; Streptococcus pyogenes; Anti-Bacterial Agents; Sensitivity and Specificity
PubMed: 38182052
DOI: 10.1016/j.cmi.2023.12.025 -
BMJ (Clinical Research Ed.) May 2007Tonsillectomy has some benefits over watchful waiting, but the net benefit is unclear and research into longer term outcomes is needed
Tonsillectomy has some benefits over watchful waiting, but the net benefit is unclear and research into longer term outcomes is needed
Topics: Child; Humans; Pharyngitis; Recurrence; Tonsillectomy; Tonsillitis
PubMed: 17478789
DOI: 10.1136/bmj.39184.617049.80 -
Frontiers in Immunology 2022Reports of periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome from developing countries are sparse. Recognizing PFAPA is often challenging... (Review)
Review
BACKGROUND
Reports of periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome from developing countries are sparse. Recognizing PFAPA is often challenging in these regions due to a higher incidence of infectious illnesses and significant resource constraints. Herein, we present our experience from North India regarding the diagnosis and management of PFAPA syndrome.
METHODS
We reviewed cases of non-monogenic periodic fever syndrome diagnosed at our center from January 2011 to December 2021. A total of 17 children who fulfilled the Marshall criteria for PFAPA syndrome were included. Data regarding basic clinical features, treatment/outcome, and performance of the recently proposed Eurofever/PRINTO and Takeuchi criteria were analyzed.
RESULTS
Besides recurrent fever, the triad of oral aphthae, pharyngitis, and adenitis was noted in only 18% of patients. Episodes of exudative pharyngitis/tonsillitis were documented in 24%. These figures were lower than the values reported from developed countries. The Takeuchi and Eurofever/PRINTO criteria were fulfilled in 76% and 71% cases, respectively. In addition to antipyretics and supportive care, intermittent steroid therapy was the main treatment modality used. Additional treatment with colchicine ( = 3) and thalidomide ( = 1) was used successfully in a few patients. Before the diagnosis of PFAPA, all patients had received multiple courses of antimicrobials (without microbiological confirmation). These included multiple courses of antibacterials for fever, pharyngotonsillitis, and/or cervical adenitis in all patients and antivirals for fever and aphthous stomatitis in a patient. Empiric antitubercular therapy had also been administered in two patients.
CONCLUSIONS
A significant proportion of patients with PFAPA seem to remain undiagnosed in the Indian subcontinent. Increased awareness and improvement in basic healthcare facilities are crucial in enhancing the recognition of PFAPA, which would eliminate the unprecedented scale of undesirable antimicrobial use in such children.
Topics: Antipyretics; Antiviral Agents; Child; Colchicine; Developing Countries; Fever; Humans; Lymphadenitis; Pharyngitis; Steroids; Stomatitis, Aphthous; Syndrome; Thalidomide; Tonsillitis
PubMed: 36203600
DOI: 10.3389/fimmu.2022.958473 -
The Pediatric Infectious Disease Journal Dec 2023Group A streptococci (GAS) are a major cause of pharyngitis in children. Recently, there were severe GAS outbreaks. The aims of this study were to assess pharyngeal...
BACKGROUND
Group A streptococci (GAS) are a major cause of pharyngitis in children. Recently, there were severe GAS outbreaks. The aims of this study were to assess pharyngeal colonization prevalence in healthy children, to assess different diagnostic definitions for GAS pharyngitis and to estimate incidence rates for these infections.
METHODS
A 2-year longitudinal study was conducted in healthy children in the United States. Pharyngeal swabs were cultured every 3 months for GAS colonization. Serum antistreptolysin O, antideoxyribonuclease B (DNaseB) and antistreptococcal C5a peptidase (SCP) antibody titers were assessed at baseline. When participants developed a sore throat, pharyngeal swabs were collected for rapid antigen detection test (RADT) and culture, and antibody titers were determined in serum samples. A range of case definitions were used for GAS pharyngitis.
RESULTS
A total of 422 children 3-12 years old were enrolled (140, 141 and 141 were 3-5, 6-9 and 10-12 years of age, respectively). The overall prevalence of GAS colonization during the study was 48%. Baseline antistreptolysin O, anti-DNaseB and anti-SCP antibody titers were higher for children older than 5 years. The incidence of GAS pharyngitis per 100 person-years was 15.9 for RADT/culture-proven and 4.6 for serologically confirmed pharyngitis.
CONCLUSIONS
GAS throat colonization and pharyngitis were frequent in children 3-12 years old. The case definition employed impacted the measured incidence of GAS pharyngitis, with higher rates detected using RADT/culture-based definitions. These data suggest that case definition is important and that young children are exposed to GAS, which may inform plans for vaccine development and implementation.
Topics: Child; Humans; Child, Preschool; Longitudinal Studies; Antistreptolysin; Streptococcal Infections; Sensitivity and Specificity; Streptococcus pyogenes; Pharyngitis
PubMed: 37768176
DOI: 10.1097/INF.0000000000004111 -
Journal of Infection in Developing... Mar 2021Pharyngitis is one of the most common diagnoses for antibiotic prescriptions worldwide. Antibiotics should be prescribed for bacterial pharyngitis to reduce its...
INTRODUCTION
Pharyngitis is one of the most common diagnoses for antibiotic prescriptions worldwide. Antibiotics should be prescribed for bacterial pharyngitis to reduce its complications. The aims of this study were to assess antibiotic prescriptions for pharyngitis cases, and their relationship with physicians' knowledge regarding its diagnosis and management.
METHODOLOGY
A cross-sectional study was conducted. First, prescriptions for pharyngitis cases using the modified Centor criteria was evaluated at primary care centers in Saudi Arabia. Second, physicians' knowledge of the modified Centor score and the diagnosis and management of pharyngitis was assessed using a self-administered questionnaire.
RESULTS
Out of 104 pharyngitis cases, 79% (n = 82) were prescribed antibiotics, of which 28% were evidence-based prescriptions. First-line antibiotics were prescribed in 34% of patients, and second-line (broad-spectrum) antibiotics such as amoxicillin/clavulanate were prescribed in half of the patients. The main significant predictors of antibiotic prescriptions were age < 3 years (odds ratio, 0.13; 95% CI, 0.02 to 0.97), tonsillar exudate (odds ratio, 21.14; 95% CI, 2.88 to 155.09), and throat erythema (odds ratio, 9.30; 95% CI, 1.18 to 73.41). Overall, physicians (n = 29) had adequate knowledge about the modified Centor score and the management of pharyngitis.
CONCLUSIONS
Most prescribed antibiotics for pharyngitis were unnecessarily prescribed; the majority being broad-spectrum antibiotics. Despite physicians' adequate knowledge of the modified Centor score and the management of pharyngitis, their practice failed to demonstrate that. Induction of the Saudi Antimicrobial Stewardship Program in the primary care centers, accessibility to diagnostic tools, and educational programs may help in reducing unnecessary antibiotic prescriptions.
Topics: Adolescent; Adult; Anti-Bacterial Agents; Antimicrobial Stewardship; Child; Child, Preschool; Cross-Sectional Studies; Female; Health Knowledge, Attitudes, Practice; Humans; Male; Middle Aged; Pharyngitis; Practice Patterns, Physicians'; Saudi Arabia; Young Adult
PubMed: 33839717
DOI: 10.3855/jidc.12822 -
American Family Physician Jul 2016
Topics: Anti-Bacterial Agents; Humans; Pharyngitis; Recurrence; Streptococcal Infections; Tonsillectomy
PubMed: 27386730
DOI: No ID Found -
PloS One 2014Pharyngitis management guidelines include estimates of the test characteristics of rapid antigen streptococcus tests (RAST) using a non-systematic approach. (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Pharyngitis management guidelines include estimates of the test characteristics of rapid antigen streptococcus tests (RAST) using a non-systematic approach.
OBJECTIVE
To examine the sensitivity and specificity, and sources of variability, of RAST for diagnosing group A streptococcal (GAS) pharyngitis.
DATA SOURCES
MEDLINE, Cochrane Reviews, Centre for Reviews and Dissemination, Scopus, SciELO, CINAHL, guidelines, 2000-2012.
STUDY SELECTION
Culture as reference standard, all languages.
DATA EXTRACTION AND SYNTHESIS
Study characteristics, quality.
MAIN OUTCOME(S) AND MEASURE(S)
Sensitivity, specificity.
RESULTS
We included 59 studies encompassing 55,766 patients. Forty three studies (18,464 patients) fulfilled the higher quality definition (at least 50 patients, prospective data collection, and no significant biases) and 16 (35,634 patients) did not. For the higher quality immunochromatographic methods in children (10,325 patients), heterogeneity was high for sensitivity (inconsistency [I(2)] 88%) and specificity (I(2) 86%). For enzyme immunoassay in children (342 patients), the pooled sensitivity was 86% (95% CI, 79-92%) and the pooled specificity was 92% (95% CI, 88-95%). For the higher quality immunochromatographic methods in the adult population (1,216 patients), the pooled sensitivity was 91% (95% CI, 87 to 94%) and the pooled specificity was 93% (95% CI, 92 to 95%); however, heterogeneity was modest for sensitivity (I(2) 61%) and specificity (I(2) 72%). For enzyme immunoassay in the adult population (333 patients), the pooled sensitivity was 86% (95% CI, 81-91%) and the pooled specificity was 97% (95% CI, 96 to 99%); however, heterogeneity was high for sensitivity and specificity (both, I(2) 88%).
CONCLUSIONS
RAST immunochromatographic methods appear to be very sensitive and highly specific to diagnose group A streptococcal pharyngitis among adults but not in children. We could not identify sources of variability among higher quality studies. The present systematic review provides the best evidence for the wide range of sensitivity included in current guidelines.
Topics: Chromatography, Affinity; Humans; Immunoenzyme Techniques; Pharyngitis; Sensitivity and Specificity; Streptococcal Infections; Streptococcus pyogenes
PubMed: 25369170
DOI: 10.1371/journal.pone.0111727 -
The Medical Clinics of North America Jan 1999Diseases of the adenoids and tonsils are a frequent cause for patients to seek medical attention. A thorough understanding of the disease processes reflected in the... (Review)
Review
Diseases of the adenoids and tonsils are a frequent cause for patients to seek medical attention. A thorough understanding of the disease processes reflected in the adenoids and tonsils and their diagnosis and treatment is an important part of routine care delivery. Diagnostic methodologies and timing of surgical intervention are reviewed along with general considerations relating to the differential diagnosis in adult and pediatric patients.
Topics: Abscess; Adenoidectomy; Adenoids; Adult; Child; Diagnosis, Differential; Humans; Hypertrophy; Pharyngitis; Tonsillectomy; Tonsillitis
PubMed: 9927961
DOI: 10.1016/s0025-7125(05)70088-2 -
Pediatric Rheumatology Online Journal Sep 2023Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) syndrome is the most common periodic fever syndrome in children; by definition, episodes...
OBJECTIVE
Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) syndrome is the most common periodic fever syndrome in children; by definition, episodes occur every 2 to 8 weeks. However, in a subset of our patients, we noticed a higher frequency of attacks, of less than 2 weeks, which we refer to as extreme PFAPA (ePFAPA). This group consisted of patients who were extreme upon presentation of PFAPA, and those who became extreme after initiation of abortive corticosteroid treatment. We aimed to characterize demographic and clinical features of ePFAPA, including the two groups, and to compare them to patients with non-extreme PFAPA (nPFAPA).
STUDY DESIGN
The medical records of 365 patients with PFAPA who attended Schneider Children's Medical Center of Israel from March 2014 to April 2021 were reviewed. Patients with concomitant familial Mediterranean fever were excluded. Characteristics of the ePFAPA (including subgroups) and nPFAPA groups were compared using Wilcoxon rank sum, Pearson's chi-squared, and Fisher's exact tests.
RESULTS
Forty-seven patients (12.9%) were identified as having ePFAPA. Among patients with ePFAPA, compared to patients with nPFAPA, the median (interquartile range) age at disease onset was earlier: 1.5 years (0.7-2.5) vs. 2.5 years (1.5-4.0), P < 0.001; and diagnosis was younger: 2.6 years (2.0-3.6) vs. 4.5 years (3.0-6.2), P < 0.001. A higher proportion of patients with ePFAPA than nPFAPA were treated with colchicine prophylaxis (53% vs. 19%, P < 0.001), but symptoms and signs during flares did not differ significantly between these groups. Demographic and clinical characteristics were similar between patients with ePFAPA from presentation of PFAPA (22, 47% of those with ePFAPA) and ePFAPA from after corticosteroid treatment.
CONCLUSION
About half the patients categorized with ePFAPA syndrome already had extreme features upon presentation. Patients with ePFAPA compared to nPFAPA presented and were diagnosed at an earlier age.
Topics: Child; Humans; Infant; Stomatitis, Aphthous; Lymphadenitis; Lymphadenopathy; Familial Mediterranean Fever; Pharyngitis; Syndrome
PubMed: 37658370
DOI: 10.1186/s12969-023-00880-1 -
Clinical Microbiology and Infection :... Dec 2021Acute pharyngitis is one of the most common conditions in outpatient settings and an important source of inappropriate antibiotic prescribing. Rapid antigen detection... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Acute pharyngitis is one of the most common conditions in outpatient settings and an important source of inappropriate antibiotic prescribing. Rapid antigen detection tests (RADTs) offer diagnosis of group A streptococcus at the point of care but have limited sensitivity. Rapid nucleic acid tests (RNATs) are now available; a systematic review of their accuracy is lacking.
OBJECTIVES
To evaluate the accuracy of RNATs in patients with pharyngitis; to explore test-level and study-level factors that could explain variability in accuracy; and to compare the accuracy of RNATs with that of RADTs.
DATA SOURCES
MEDLINE, Embase, Web of Science (1990-2020).
STUDY ELIGIBILITY CRITERIA
Cross-sectional studies and randomized trials.
PARTICIPANTS
Patients with pharyngitis.
INDEX TEST/S AND REFERENCE STANDARDS
RNAT commercial kits compared with throat culture.
METHODS
We assessed risk of bias and applicability using QUADAS-2. We performed meta-analysis of sensitivity and specificity using the bivariate random-effects model. Variability was explored by subgroup analyses and meta-regression.
RESULTS
We included 38 studies (46 test evaluations; 17 411 test results). RNATs were most often performed in a laboratory. The overall methodological quality of primary studies was uncertain because of incomplete reporting. RNATs had a summary sensitivity of 97.5% (95% CI 96.2%-98.3%) and a summary specificity of 95.1% (95% CI 93.6%-96.3%). There was low variability in estimates across studies. Variability in sensitivity and specificity was partially explained by test type (p < 0.05 for both). Sensitivity analyses limited to studies with low risk of bias showed robust accuracy estimates. RNATs were more sensitive than RADTs (13 studies; 96.8% versus 82.3%, p 0.004); there was no difference in specificity (p 0.92).
CONCLUSIONS
The high diagnostic accuracy of RNATs may allow their use as stand-alone tests to diagnose group A streptococcus pharyngitis. Based on direct comparisons, RNATs have greater sensitivity than RADTs and equal specificity. Further studies should evaluate RNATs in point-of-care settings.
Topics: Humans; Nucleic Acid Amplification Techniques; Nucleic Acids; Pharyngitis; Point-of-Care Testing; Sensitivity and Specificity; Streptococcus pyogenes
PubMed: 33964409
DOI: 10.1016/j.cmi.2021.04.021