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Rapid streptococcal tests

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https://www.readbyqxmd.com/read/29135828/improved-diagnostic-performance-of-an-immunofluorescence-based-rapid-antigen-detection-test-for-group-a-streptococci-in-children-with-pharyngitis
#1
Laurence Lacroix, Abdessalam Cherkaoui, Diane Schaller, Sergio Manzano, Annick Galetto-Lacour, Ulrich Pfeifer, René Tabin, Alain Gervaix
BACKGROUND: Accurate diagnosis and appropriate treatment of Group A streptococcal (GAS) pharyngitis are important to prevent complications. Most available rapid antigen detection tests (RADTs) have shown excellent specificity but often lack sensitivity. Our objective was to compare the diagnostic performances of a new fluorescence-based immunoassay and a classic immunochromatographic RADT using standard throat culture or PCR as references. MATERIALS/METHODS: Prospective observational study in 2 pediatric emergency departments in children aged 3 to 15 years old presenting with pharyngitis and a McIsaac score ≥ 2...
November 11, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29099353/streptococcus-bovimastitidis-sp-nov-isolated-from-a-dairy-cow-with-mastitis
#2
Stefan P W de Vries, Nazreen F Hadjirin, Elizabeth M Lay, Ruth N Zadoks, Sharon J Peacock, Julian Parkhill, Andrew J Grant, Scott McDougall, Mark A Holmes
Here we describe a new species of the genus Streptococcus that was isolated from a dairy cow with mastitis in New Zealand. Strain NZ1587(T) was Gram-positive, coccus-shaped and arranged as chains, catalase and coagulase negative, γ-haemolytic and negative for Lancefield carbohydrates (A-D, F and G). The 16S rRNA sequence did not match sequences in the NCBI 16S rRNA or GreenGenes databases. Taxonomic classification of strain NZ1587(T) was investigated using 16S rRNA and core genome phylogeny, genome-wide average nucleotide identity (ANI) and predicted DNA-DNA hybridisation (DDH) analyses...
November 3, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29022552/multiplex-pcr-for-identification-of-six-clinically-relevant-streptococci
#3
Rujirat Hatrongjit, Yukihiro Akeda, Shigeyuki Hamada, Marcelo Gottschalk, Anusak Kerdsin
PURPOSE: The aim of this study was to develop a multiplex PCR (mPCR) for simultaneous detection (single reaction) of six clinically relevant streptococcal species: Streptococcus pneumoniae, Streptococcus suis, Streptococcus gallolyticus subsp. gallolyticus, S. gallolyticus subsp. pasteurianus, Streptococcus intermedius and Streptococcus anginosus/constellatus. METHODS: mPCR with primers specific for S. pneumoniae (lytA), S. suis (recN), S. gallolyticus subsp. gallolyticus (tanB), S...
October 12, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28989283/abdominal-pain-and-nausea-in-the-diagnosis-of-streptococcal-pharyngitis-in-boys
#4
Hiroshi Igarashi, Naoki Nago, Hiromichi Kiyokawa, Motoharu Fukushi
OBJECTIVES: This study was designed to assess the accuracy of gastrointestinal symptoms, including abdominal pain, nausea, and vomiting, in the diagnosis of Group A streptococcal (GAS) pharyngitis in children and to determine differences in diagnostic accuracy in boys versus girls. METHODS: This retrospective cross-sectional study included 5,755 consecutive patients aged <15 years with fever in the electronic database at a primary care practice. Gastrointestinal symptoms were recorded in the database according to the International Classification of Primary Care codes, and the data were extracted electronically...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28934088/accuracy-of-a-rapid-intrapartum-group%C3%A2-b-streptococcus-test-a-new-immunochromatographic-assay
#5
A Delabaere, S Curinier, S Ughetto, L Gibold, R Bonnet, A Rossi, D Gallot
OBJECTIVES: To decrease the incidence of early-onset group B streptococcal (GBS) disease, a culture-based screening of all pregnant women at 35-37 weeks is recommended. This gold standard test requires 24-72hours culture. This delay precludes its use for intrapartum screening. This study assesses a new immunoassay, the DIMA test, for identifying GBS-positive patients in the labor ward. MATERIALS AND METHODS: This was a prospective observational study of 195 pregnant women presenting with full-term labor at a single site in France between June and August 2012...
May 2017: Journal of Gynecology Obstetrics and Human Reproduction
https://www.readbyqxmd.com/read/28869722/pain-relief-of-sore-throat-with-a-new-anti-inflammatory-throat-lozenge-ibuprofen-25%C3%A2-mg-a-randomised-double-blind-placebo-controlled-international-phase-iii-study
#6
Athmane Bouroubi, Yves Donazzolo, Franck Donath, Ron Eccles, Marc Russo, Nadine Harambillet, Stéphanie Gautier, Agnès Montagne
OBJECTIVE: The aim of this study was to compare the efficacy and safety of a new oromucosal ibuprofen form, ibuprofen 25 mg lozenge, in single and repeat dosing for up to 4 days, to the matched placebo, in the treatment of acute sore throat pain in adults. METHODS: In this randomised, double-blind, placebo-controlled trial, adult patients with non-streptococcal sore throat and signs of moderate-to-severe associated pain (≥5 on the objective Tonsillo-Pharyngitis Assessment 21-point scale and ≥60 mm on the subjective 0-100 mm visual analogue Sore Throat Pain Intensity Scale [STPIS]) were assigned ibuprofen 25 mg (n=194) or matching placebo (n=191) lozenge treatment...
September 4, 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28781106/-diagnosis-and-treatment-of-acute-pharyngitis-is-there-any-benefit-on-ten-day-course-of-antibiotics
#7
Catarina Oliveira Pereira, Daniela Ramos, Patrícia Mação, Gustavo Januário, Luís Januário
INTRODUCTION: In group A streptococcal (GAS) pharyngitis a ten-day course of amoxicillin is recommended. However, short-course treatments seem to be equally effective. The aim of this study was to retrospectively evaluate and compare the outcome of patients treated with 7-day course and 10-day course of amoxicillin. MATERIALS AND METHODS: Retrospective analysis of all GAS pharyngitis admitted to a paediatric emergency department in 2014. Demographic variables, the application and results of the rapid antigenic diagnostic test (RADT), treatment, complications and return in the next 30 days were analysed...
August 3, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28562462/the-challenge-of-patient-notification-and-the-work-of-follow-up-generated-by-a-2-step-testing-protocol-for-group-a-streptococcal-pharyngitis-in-the-pediatric-emergency-department
#8
Michael E Russo, Jennifer Kline, Preeti Jaggi, Amy L Leber, Daniel M Cohen
OBJECTIVE: Current guidelines recommend confirmatory testing for negative rapid antigen detection tests (RADTs) for group A streptococcal pharyngitis in children. We sought to describe the work of follow-up generated by this process and frequency of our inability to notify patients of positive results. METHODS: We retrospectively reviewed laboratory and outreach nurse records of patients who had group A streptococcal pharyngitis testing performed in an academic pediatric emergency department during 2014...
May 30, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28557742/viral-features-and-testing-for-streptococcal-pharyngitis
#9
Daniel J Shapiro, Christina E Lindgren, Mark I Neuman, Andrew M Fine
BACKGROUND AND OBJECTIVES: The Infectious Diseases Society of America recommends that clinicians forego testing for group A Streptococcal (GAS) pharyngitis in patients with clinical features of viral illness. The prevalence of viral features in patients tested for GAS pharyngitis is not known. The objectives of this study were as follows: to describe the prevalence of viral features in pediatric patients for whom rapid antigen detection tests (RADTs) for GAS pharyngitis are performed; and to compare the prevalence of GAS and the sensitivity of the RADT in patients with and without viral features...
May 2017: Pediatrics
https://www.readbyqxmd.com/read/28387528/palatal-petechiae-in-the-absence-of-group-a-streptococcus-in-pediatric-patients-with-acute-onset-neuropsychiatric-deterioration-a-cohort-study
#10
Talia Mahony, Douglas Sidell, Hayley Gans, Michael Cooperstock, Kayla Brown, Joanne M Cheung, Bahare Farhadian, Melissa Gustafson, Margo Thienemann, Jennifer Frankovich
BACKGROUND: Palatal petechiae are 95% specific for streptococcal pharyngitis. Despite this, and despite prior research demonstrating that Group A Streptococcus (GAS) is a common antecedent to pediatric acute-onset neuropsychiatric syndrome (PANS) episodes, we anecdotally observed a low rate of documented GAS in patients with PANS and palatal petechiae. This retrospective chart review was conducted to formally report the rate of palatal petechiae and concurrent GAS in a cohort of patients with PANS and investigate other etiologic factors...
September 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28283012/-evaluation-of-mascia-brunelli-rapid-antigen-test-in-the-diagnosis-of-group-a-streptococcal-pharyngitis
#11
Ayşe Barış, Nur Anlıaçık, Mehmet Emin Bulut, Rıdvan Deniz, Elif Yücel, Elif Aktaş
Pharyngitis in most cases is due to viral microorganisms however drug therapy without the detection of etiological agent leads to unnecessary use of antibiotics. On the other hand, when the etiologic agent is group A beta-hemolytic streptococci (GAS) it is important to identify the etiologic agent rapidly which will guide the treatment with appropriate antibiotics. The use of highly sensitive rapid tests will contribute significantly to early diagnosis and appropriate therapy. The aim of this study is to evaluate the efficacy of Mascia Brunelli rapid antigen test for the detection of GAS in throat swab samples...
January 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28197223/a-multifaceted-approach-to-decrease-inappropriate-antibiotic-use-in-a-pediatric-outpatient-clinic
#12
Jaffar A Al-Tawfiq, Amel H Alawami
BACKGROUND: Inappropriate use of antimicrobial agents is the major cause for the development of resistance. Thus, it is important to include outpatient clinics in the development of antibiotic stewardship program. METHODS: We report a multifaceted approach to decrease inappropriate antibiotic use in upper respiratory tract infections (URTIs) in an outpatient pediatric clinic. The interventions included educational grand round, academic detailing, and prospective audit and feedback and peer comparison...
January 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/28052179/sensitivity-for-diagnosing-group-a-streptococcal-pharyngitis-from-manufacturers-is-10-higher-than-reported-in-peer-reviewed-publications
#13
Raj Vachhani, Toral Patel, Robert M Centor, Carlos A Estrada
OBJECTIVES: Meta-analyses based on peer-reviewed publications report a sensitivity of approximately 85% for rapid antigen streptococcus tests to diagnose group A streptococcal (GAS) pharyngitis. Because these meta-analyses excluded package inserts, we examined the test characteristics of rapid antigen streptococcal tests and molecular methods that manufacturers report in their package inserts. METHODS: We included tests available in the US market (Food and Drug Administration, period searched 1993-2015) and used package insert data to calculate pooled sensitivity and specificity...
January 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/27997479/potential-for-pharmacy-public-health-collaborations-using-pharmacy-based-point-of-care-testing-services-for-infectious-diseases
#14
Paul O Gubbins, Michael E Klepser, Alex J Adams, David M Jacobs, Kelly M Percival, Gregory B Tallman
CONTEXT: Health care professionals must continually identify collaborative ways to combat antibiotic resistance while improving community health and health care delivery. Clinical Laboratory Improvement Amendments of 1988 (CLIA)-waived point-of-care (POC) testing (POCT) services for infectious disease conducted in community pharmacies provide a means for pharmacists to collaborate with prescribers and/or public health officials combating antibiotic resistance while improving community health and health care delivery...
November 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/27989256/junctional-tachycardia-in-a-child-with-non-rheumatic-fever-streptococcal-pharyngitis
#15
Neha Bansal, Peter P Karpawich, Chenni S Sriram
Accelerated junctional rhythm has been reported in children in the setting of acute rheumatic fever; however, we describe a hitherto unreported case of isolated junctional tachycardia in a child with streptococcal pharyngitis, not meeting revised Jones criteria for rheumatic fever. A previously healthy, 9-year-old girl presented to the emergency department with complaints of sore throat, low-grade fever, and intermittent chest pain. She was found to have a positive rapid streptococcal antigen test. The initial electrocardiogram showed junctional tachycardia with atrioventricular dissociation in addition to prolonged and aberrant atrioventricular conduction...
December 19, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27981538/diagnosis-and-treatment-of-acute-pharyngitis-tonsillitis-a-preliminary-observational-study-in-general-medicine
#16
F Di Muzio, M Barucco, F Guerriero
OBJECTIVE: According to recent observations, the insufficiently targeted use of antibiotics is creating increasingly resistant bacterial strains. In this context, it seems increasingly clear the need to resort to extreme and prudent rationalization of antibiotic therapy, especially by the physicians working in primary care units. In clinical practice, actually the general practitioner often treats multiple diseases without having the proper equipment. In particular, the use of a dedicated, easy to use diagnostic test would be one more weapon for the correct diagnosis and treatment of acute pharyngo-tonsillitis...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27939516/nonrheumatic-myopericarditis-post-acute-streptococcal-pharyngitis-an-uncommon-cause-of-sore-throat-with-st-segment-elevation
#17
Ali Pourmand, Daniel Gelman, Steven Davis, Hamid Shokoohi
Nonrheumatic myopericarditis is an uncommon complication of acute pharyngitis caused by Group A Streptococcal infection (GAS). While the natural history of carditis complicating acute rheumatic fever is well established, the incidence, pathophysiology and clinical course of nonrheumatic myopericarditis are ill defined. Advances in rapid bedside testing for both myocardial injury and GAS pharyngitis have allowed for increasing recognition of this uncommon complication in patients presenting with a sore throat with associated chest discomfort...
May 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27907154/pheromone-recognition-and-selectivity-by-comr-proteins-among-streptococcus-species
#18
Erin Shanker, Donald A Morrison, Antoine Talagas, Sylvie Nessler, Michael J Federle, Gerd Prehna
Natural transformation, or competence, is an ability inherent to bacteria for the uptake of extracellular DNA. This process is central to bacterial evolution and allows for the rapid acquirement of new traits, such as antibiotic resistance in pathogenic microorganisms. For the Gram-positive bacteria genus Streptococcus, genes required for competence are under the regulation of quorum sensing (QS) mediated by peptide pheromones. One such system, ComRS, consists of a peptide (ComS) that is processed (XIP), secreted, and later imported into the cytoplasm, where it binds and activates the transcription factor ComR...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27903001/right-in-front-of-our-eyes-evolution-of-streptococcal-toxic-shock-syndrome-with-ischemic-optic-neuropathy
#19
Salaheldin M Elhamamsy, Mazen O Al-Qadi, Taro Minami, Marguerite Neill
INTRODUCTION: Toxic shock syndrome occurs from dysregulation of host inflammatory responses. Toxin- producing strains of Group A streptococcus cause TSS. Ischemic optic neuropathy rarely complicates septic shock. We present a rare case of streptococcal pharyngitis complicated by septic arthritis and TSS with reversible blindness due to non-arteritic ischemic optic neuropathy. CASE: A 28-year-old man drove to our ED with exudative pharyngitis. A rapid streptococcal test was positive...
December 1, 2016: Rhode Island Medical Journal
https://www.readbyqxmd.com/read/27783124/a-new-immunoassay-of-serum-antibodies-against-peste-des-petits-ruminants-virus-using-quantum-dots-and-a-lateral-flow-test-strip
#20
Si Cheng, Jie Sun, Junxing Yang, Jianqiang Lv, Feng Wu, Yanxing Lin, Lishan Liao, Yiyou Ye, Chenfu Cao, Liurong Fang, Qunyi Hua
A fast and ultrasensitive test-strip system combining quantum dots (QDs) with a lateral-flow immunoassay strip (LFIAS) was established for detection of Peste des petits ruminants virus (PPRV) antibody. The highly luminescent water-soluble carboxyl-functionalized QDs were used as the signal output and were conjugated to streptococcal protein G (SPG), which was capable of binding to immunoglobulin G (IgG) from many species through an amide bond to capture the target PPRV IgGs. The PPRV N protein, which was immobilized on the detection zone of the test strip, was expressed by transfecting recombinant Bacmid-PPRV-N with Lipofect into Sf9 insect cells...
January 2017: Analytical and Bioanalytical Chemistry
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