RESUMO
BACKGROUND: Multiplex molecular diagnostic panels have greatly enhanced detection of gastrointestinal pathogens. However, data on the impact of these tests on clinical and patient-centered outcomes are limited. METHODS: We conducted a prospective, multicenter, stepped-wedge trial to determine the impact of multiplex molecular testing at 5 academic children's hospitals on children presenting to the emergency department with acute gastroenteritis. Caregivers were interviewed on enrollment and 7-10 days after enrollment to determine symptoms, risk factors, subsequent medical visits, and impact on family members. During the pre-intervention period, diagnostic testing was performed at the clinician's discretion . During the intervention period, multiplex molecular testing was performed on all children, with results available to clinicians. The primary outcome was return visits to a healthcare provider within 10 days of enrollment. RESULTS: Potential pathogens were identified by clinician-ordered tests in 19 of 571 (3.3%) in the pre-intervention period compared with 434 of 586 (74%) in the intervention period; clinically relevant pathogens were detected in 2.1% and 15%, respectively. In the multivariate model, the intervention was associated with a 21% reduction in the odds of any return visit (odds ratio, 0.79; 95% confidence interval, .70-.90) after adjusting for potential confounders. Appropriate treatment was prescribed in 11.3% compared with 19.6% during the intervention period (P = .22). CONCLUSIONS: Routine molecular multiplex testing for all children who presented to the ED with acute gastroenteritis detected more clinically relevant pathogens and led to a 21% decrease in return visits. Additional research is needed to define patients most likely to benefit from testing. Clinical Trials Registration. NCT02248285.
Assuntos
Gastroenterite , Criança , Humanos , Serviço Hospitalar de Emergência , Gastroenterite/diagnóstico , Gastroenterite/tratamento farmacológico , Técnicas de Diagnóstico Molecular/métodos , Estudos Prospectivos , Fatores de RiscoRESUMO
BACKGROUND: Fever is a common symptom in children presenting to the Emergency Department (ED). We aimed to describe the epidemiology of systemic viral infections and their predictive values for excluding serious bacterial infections (SBIs), including bacteremia, meningitis and urinary tract infections (UTIs) in children presenting to the ED with suspected systemic infections. METHODS: We enrolled children who presented to the ED with suspected systemic infections who had blood cultures obtained at seven healthcare facilities. Whole blood specimens were analyzed by an experimental multiplexed PCR test for 7 viruses. Demographic and laboratory results were abstracted. RESULTS: Of the 1114 subjects enrolled, 245 viruses were detected in 224 (20.1%) subjects. Bacteremia, meningitis and UTI frequency in viral bloodstream-positive patients was 1.3, 0 and 10.1% compared to 2.9, 1.3 and 9.7% in viral bloodstream-negative patients respectively. Although viral bloodstream detections had a high negative predictive value for bacteremia or meningitis (NPV = 98.7%), the frequency of UTIs among these subjects remained appreciable (9/89, 10.1%) (NPV = 89.9%). Screening urinalyses were positive for leukocyte esterase in 8/9 (88.9%) of these subjects, improving the ability to distinguish UTI. CONCLUSIONS: Viral bloodstream detections were common in children presenting to the ED with suspected systemic infections. Although overall frequencies of SBIs among subjects with and without viral bloodstream detections did not differ significantly, combining whole blood viral testing with urinalysis provided high NPV for excluding SBI.
Assuntos
Bacteriemia , Infecções Bacterianas , Infecções Urinárias , Bacteriemia/diagnóstico , Bacteriemia/epidemiologia , Criança , Serviço Hospitalar de Emergência , Febre , Humanos , Lactente , Infecções Urinárias/diagnóstico , Infecções Urinárias/epidemiologiaRESUMO
In pediatric practice it is common for infants under 2 months of age to undergo evaluation for sepsis when they are ill, often including lumbar puncture to assess for central nervous system (CNS) infection. The FilmArray Meningitis/Encephalitis (ME) panel is a newly approved test for rapid identification of CNS pathogens. Our objective was to study the epidemiology of CNS infection in young infants and the potential impact of rapid multiplex PCR on their care. A performance evaluation of the FilmArray ME panel was conducted from February 2014 to September 2014 at 11 sites. FilmArray ME panel results were compared to reference standards but not shared with providers. In our study, medical records for infants (aged 1 to 60 days) enrolled at three sites were reviewed for clinical, laboratory, and outcome data. A total of 145 infants were reviewed. The median age was 25 days. Most of the infants were hospitalized (134/145 [92%]) and received antibiotics (123/145 [85%]), and almost half (71/145 [49%]) received acyclovir. One infant had a bacterial pathogen, likely false positive, identified by the FilmArray ME panel. Thirty-six infants (25%) had a viral pathogen detected, including 21 enteroviruses. All infants with enteroviral meningitis detected by the FilmArray ME panel and conventional PCR were hospitalized, but 20% were discharged in less than 24 h when conventional PCR results became available. The FilmArray ME panel may play a role in the evaluation of young infants for CNS infection. Results may be used to guide management, possibly resulting in a decreased length of stay and less antimicrobial exposure for infants with low-risk viral infection detected.
Assuntos
Líquido Cefalorraquidiano/microbiologia , Líquido Cefalorraquidiano/virologia , Encefalite/diagnóstico , Meningite/diagnóstico , Técnicas de Diagnóstico Molecular , Bactérias/isolamento & purificação , Infecções do Sistema Nervoso Central/líquido cefalorraquidiano , Infecções do Sistema Nervoso Central/diagnóstico , Infecções do Sistema Nervoso Central/epidemiologia , Testes Diagnósticos de Rotina , Encefalite/líquido cefalorraquidiano , Encefalite/epidemiologia , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Meningite/líquido cefalorraquidiano , Meningite/epidemiologia , Reação em Cadeia da Polimerase Multiplex , Estudos Retrospectivos , Fatores de Tempo , Estados Unidos/epidemiologia , Vírus/isolamento & purificaçãoRESUMO
The FilmArray Respiratory Panel 2 (RP2) is a multiplex in vitro diagnostic test for the simultaneous and rapid (â¼45-min) detection of 22 pathogens directly from nasopharyngeal swab (NPS) samples. It contains updated (and in some instances redesigned) assays that improve upon the FilmArray Respiratory Panel (RP; version 1.7), with a faster run time. The organisms identified are adenovirus, coronavirus 229E, coronavirus HKU1, coronavirus NL63, coronavirus OC43, human metapneumovirus, human rhinovirus/enterovirus, influenza virus A, influenza virus A H1, influenza virus A H1-2009, influenza virus A H3, influenza virus B, parainfluenza virus 1, parainfluenza virus 2, parainfluenza virus 3, parainfluenza virus 4, respiratory syncytial virus, Bordetella pertussis, Chlamydia pneumoniae, and Mycoplasma pneumoniae Two new targets are included in the FilmArray RP2: Middle East respiratory syndrome coronavirus and Bordetella parapertussis This study provides data from a multicenter evaluation of 1,612 prospectively collected NPS samples, with performance compared to that of the FilmArray RP or PCR and sequencing. The overall percent agreement between the FilmArray RP2 and the comparator testing was 99.2%. The RP2 demonstrated a positive percent agreement of 91.7% or greater for detection of all but three analytes: coronavirus OC43, B. parapertussis, and B. pertussis The FilmArray RP2 also demonstrated a negative percent agreement of ≥93.8% for all analytes. Of note, the adenovirus assay detects all genotypes, with a demonstrated increase in sensitivity. The FilmArray RP2 represents a significant improvement over the FilmArray RP, with a substantially shorter run time that could aid in the diagnosis of respiratory infections in a variety of clinical scenarios.
Assuntos
Técnicas de Diagnóstico Molecular/métodos , Reação em Cadeia da Polimerase Multiplex/métodos , Nasofaringe/microbiologia , Nasofaringe/virologia , Infecções Respiratórias/diagnóstico , Adolescente , Adulto , Infecções Bacterianas/diagnóstico , Bordetella pertussis/genética , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Metapneumovirus/genética , Pessoa de Meia-Idade , Técnicas de Diagnóstico Molecular/instrumentação , Reação em Cadeia da Polimerase Multiplex/instrumentação , Mycoplasma pneumoniae/genética , Vírus Sinciciais Respiratórios/genética , Infecções Respiratórias/microbiologia , Infecções Respiratórias/virologia , Rhinovirus/genética , Viroses/diagnóstico , Adulto JovemRESUMO
The Shiga Toxin Direct molecular assay (ST Direct) relies on nucleic acid amplification and solid array-based amplicon detection to identify Shiga toxin-producing Escherichia coli (STEC) in preserved stool specimens. Genes encoding Shiga toxin (stx1 and stx2), as well as the E. coli serotype O:157-specific marker rfbE, are simultaneously detected within 2 h. ST Direct was evaluated using 1,084 prospectively collected preserved stool specimens across five clinical centers. An additional 55 retrospectively collected, frozen specimens were included to increase the number of positive specimens evaluated. Results were compared to results from routine culture and an enzyme immunoassay (EIA) specific for the recovery and identification of STEC. ST Direct was found to be 93.2% sensitive and 99.3% specific for detection of stx1 and stx2 and 95.7% sensitive and 99.3% specific for detection of E. coli serotype O:157. All specimens with false-positive results were found to contain stx1 or stx2 or were found to be positive for serotype O:157 when analyzed using alternative molecular methods. All 4 false-negative stx1 or stx2 results were reported for frozen, retrospectively tested specimens. In all cases, the specimens tested positive for stx by an alternative FDA-cleared nucleic acid amplification test (NAAT) but were negative for stx1 and stx2 following nucleic acid sequence analysis. Based on these data, culture and EIA-based methods for detection of STEC are only 33% sensitive compared to molecular tests. A retrospective cost analysis demonstrated 59% of the cost of routine stool culture to be attributable to the identification of STEC. Taken together, these data suggest that ST Direct may provide a cost-effective, rapid molecular alternative to routine culture for the identification of STEC in preserved stool specimens.
Assuntos
Custos e Análise de Custo , Infecções por Escherichia coli/diagnóstico , Fezes/microbiologia , Técnicas de Diagnóstico Molecular/economia , Técnicas de Diagnóstico Molecular/métodos , Toxina Shiga/genética , Escherichia coli Shiga Toxigênica/isolamento & purificação , Técnicas Bacteriológicas/métodos , Carboidratos Epimerases/genética , Humanos , Técnicas Imunoenzimáticas/métodos , Estudos Prospectivos , Estudos Retrospectivos , Sensibilidade e Especificidade , Escherichia coli Shiga Toxigênica/genética , Fatores de Tempo , Transaminases/genéticaRESUMO
Bloodstream infections are a leading cause of morbidity and mortality in the United States and are associated with increased health care costs. We evaluated the Portrait Staph ID/R blood culture panel (BCP) multiplex PCR assay (Great Basin Scientific, Salt Lake City, UT) for the rapid and simultaneous identification (ID) of Staphylococcus aureus, Staphylococcus lugdunensis, and Staphylococcus species to the genus level and the detection of the mecA gene directly from a positive blood culture bottle. A total of 765 Bactec bottles demonstrating Gram-positive cocci in singles or clusters were tested during the prospective trial at 3 clinical sites. The Portrait Staph ID/R BCP results were compared with results from conventional biochemical and cefoxitin disk methods performed at an independent laboratory. Discordant ID and mecA results were resolved by rpoB gene sequencing and mecA gene sequencing, respectively. A total of 658 Staphylococcus species isolates (S. aureus, 211 isolates; S. lugdunensis, 3 isolates; and Staphylococcus spp., 444 isolates) were recovered from monomicrobial and 33 polymicrobial blood cultures. After discrepant analysis, the overall ratios of Portrait Staph ID/R BCP positive percent agreement and negative percent agreement were 99.4%/99.9% for Staphylococcus ID and 99.7%/99.2% for mecA detection.
Assuntos
Hemocultura/métodos , Genes Bacterianos , Resistência a Meticilina , Reação em Cadeia da Polimerase Multiplex/métodos , Infecções Estafilocócicas/diagnóstico , Staphylococcus/classificação , Staphylococcus/isolamento & purificação , Humanos , Estudos Prospectivos , Infecções Estafilocócicas/microbiologia , Staphylococcus/genética , Fatores de Tempo , Estados UnidosRESUMO
We compared group A Streptococcus (GAS) culture with a rapid helicase-dependent amplification (HDA) method using 1,082 throat swab specimens. The HDA method demonstrated 98.2% sensitivity and 97.2% specificity. GAS prevalence by culture was 20.7%, and it was 22.6% using the HDA method. In 35 min, the HDA method provided rapid, sensitive GAS detection, making culture confirmation unnecessary.
Assuntos
Técnicas Bacteriológicas/métodos , Técnicas de Diagnóstico Molecular/métodos , Técnicas de Amplificação de Ácido Nucleico/métodos , Infecções Estreptocócicas/diagnóstico , Streptococcus pyogenes/isolamento & purificação , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Faringe/microbiologia , Estudos Prospectivos , Sensibilidade e Especificidade , Fatores de Tempo , Adulto JovemRESUMO
Sepsis is a major cause of morbidity, mortality, and increased medical expense. Rapid diagnosis improves outcomes and reduces costs. The FilmArray blood culture identification panel (BioFire Diagnostics LLC, Salt Lake City, UT), a highly multiplexed PCR assay, can identify 24 etiologic agents of sepsis (8 Gram-positive, 11 Gram-negative, and 5 yeast species) and three antimicrobial resistance genes (mecA, vanA/B, and blaKPC) from positive blood culture bottles. It provides results in about 1 h with 2 min for assay setup. We present the results of an eight-center trial comparing the sensitivity and specificity of the panel with those of the laboratories' standard phenotypic identification techniques, as well as with molecular methods used to distinguish Acinetobacter baumannii from other members of the A. calcoaceticus-A. baumannii complex and to detect antimicrobial resistance genes. Testing included 2,207 positive aerobic blood culture samples, 1,568 clinical and 639 seeded. Samples were tested fresh or were frozen for later testing within 8 h after the bottles were flagged as positive by an automated blood culture system. At least one organism was detected by the panel in 1,382 (88.1%) of the positive clinical specimens. The others contained primarily off-panel organisms. The panel reported multiple organisms in 81 (5.86%) positive clinical specimens. The unresolved blood culture identification sensitivity for all target detections exceeded 96%, except for Klebsiella oxytoca (92.2%), which achieved 98.3% sensitivity after resolution of an unavoidable phenotypic error. The sensitivity and specificity for vanA/B and blaKPC were 100%; those for mecA were 98.4 and 98.3%, respectively.
Assuntos
Bactérias/classificação , Bactérias/genética , Reação em Cadeia da Polimerase Multiplex , Sepse/diagnóstico , Sepse/microbiologia , Leveduras/classificação , Leveduras/genética , Bactérias/efeitos dos fármacos , Farmacorresistência Bacteriana , Farmacorresistência Fúngica , Genes Bacterianos , Genes Fúngicos , Humanos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Leveduras/efeitos dos fármacosRESUMO
We evaluated the clinical performance (sensitivity and specificity) of the AmpliVue group A Streptococcus (GAS) isothermal helicase-dependent amplification assay using 1,192 pharyngeal swab specimens. AmpliVue GAS assay results were compared to the results of routine throat cultures on selective streptococcal blood agar plates. The sensitivity and specificity of the AmpliVue GAS assay were 98.3% (95% confidence interval [CI], 95 to 100%) and 93.2% (95% CI, 91 to 95%), respectively.
Assuntos
Técnicas de Diagnóstico Molecular/métodos , Técnicas de Amplificação de Ácido Nucleico/métodos , Faringe/microbiologia , Infecções Estreptocócicas/diagnóstico , Streptococcus pyogenes/isolamento & purificação , Humanos , Sensibilidade e Especificidade , Streptococcus pyogenes/genéticaRESUMO
BACKGROUND: Respiratory pathogens are a leading cause of hospital admission and traditional detection methods are time consuming and insensitive. Multiplex molecular detection methods have recently been investigated in hope of replacing these traditional techniques with rapid panel-based testing. OBJECTIVES: This study evaluated the FilmArray(®) Respiratory Panel ([FARP], Idaho Technology Inc., Salt Lake City, UT) as a replacement for direct fluorescent antibody (DFA) testing in a pediatric hospital. METHODS: Eleven of the 21 FARP analytes (Adenovirus, Bordetella pertussis, human Metapneumovirus, Influenza A, Influenza A H1N1 2009, Influenza B, Parainfluenza [1, 2, & 3], Respiratory Syncytial Virus, and rhinovirus) were evaluated using nasopharyngeal specimens. Positive samples were pooled in groups of 5. Samples identified by reference methods as positive for respiratory pathogens were used for the majority of positive samples. DFA was the reference method for ten analytes; Luminex™ xTAG Respiratory Virus Panel (RVP) was the reference method for rhinovirus. Discrepant results were resolved by positive culture and fluorescent antibody stain and/or laboratory-developed real-time polymerase chain reaction (PCR) assays (LDT). RESULTS: The agreement for most analytes was in concordance with the established reference methods with the exception of Adenovirus. Additionally, the FARP detected several pathogens not previously detected by DFA, and most were confirmed by LDT. Several DFA-positive analytes were confirmed as true-negatives by the FARP and LDT. CONCLUSION: FARP overall performed better than DFA with the exception of Adenovirus, making the FARP an attractive alternative to laboratories looking to replace DFA with a rapid, user-friendly, multiplex molecular assay.
Assuntos
Técnicas Microbiológicas/métodos , Reação em Cadeia da Polimerase Multiplex/métodos , Virologia/métodos , Adolescente , Bordetella pertussis , Criança , Pré-Escolar , Técnica Direta de Fluorescência para Anticorpo , Hospitais Pediátricos , Humanos , Lactente , Recém-Nascido , Limite de Detecção , Pneumopatias/microbiologia , Pneumopatias/virologia , Nasofaringe/microbiologia , Nasofaringe/virologia , Reprodutibilidade dos Testes , Vírus/genética , Vírus/isolamento & purificação , Adulto JovemRESUMO
Background: Multiplex molecular diagnostic panels have greatly enhanced detection of gastrointestinal pathogens. However, data on the impact of these tests on clinical and patient-centered outcomes are limited. Methods: We conducted a prospective, multicenter, stepped-wedge trial to determine the impact of multiplex molecular testing at five academic children's hospitals in children presenting to the ED with acute gastroenteritis. Caregivers were interviewed on enrollment and again 7-10 days after enrollment to determine symptoms, risk factors, subsequent medical visits, and impact on family members. During the pre-intervention period, diagnostic testing was performed at the discretion of clinicians. During the intervention period, multiplex molecular testing was performed on all children with results available to clinicians. Primary outcome was return visits to a health care provider within 10 days of enrollment. Results: Potential pathogens were identified by clinician ordered tests in 19/571 (3.3%) in the pre-intervention period compared to 434/586 (74%) in the intervention period; clinically relevant pathogens were detected in 2.1% and 15% respectively. In the multivariate model adjusting for potential confounders, the intervention was associated with a 21% reduction in the odds of any return visit (OR 0.79; 95% CI 0.70-0.90). Appropriate treatment was prescribed in 11.3% compared to 19.6% during the intervention period(P=0.22). Conclusions: Routine molecular multiplex testing for all children presenting to the ED with AGE detected more clinically relevant pathogens and led to a 21% decrease in return visits. Additional research is needed to define patients most likely to benefit from testing.
RESUMO
We compared the Portrait Toxigenic C. difficile Assay, a new semiautomated sample-to-result molecular test, to a toxigenic bacterial culture/cell cytotoxin neutralization assay (TBC/CCNA) for the detection of toxigenic Clostridium difficile in 549 stool specimens. Stool specimens were also tested by one of three alternative FDA-cleared molecular tests for toxigenic C. difficile (Xpert C. difficile, Illumigene C. difficile, or GeneOhm Cdiff). The sensitivities and specificities of the molecular tests compared to TBC/CCNA were as follows: 98.2% and 92.8% for the Portrait assay, 100% and 91.7% for the Xpert assay, 93.3% and 95.1% for the Illumigene assay, and 97.4% and 98.5% for the GeneOhm assay, respectively. The majority of Portrait false-positive results (20/31; 64.5%) were also positive for C. difficile by an alternative molecular test, suggesting an increased sensitivity compared to the culture-based "gold standard" method. The Portrait test detected an assay input of 30 CFU in 100% of spiked samples and detected an input of 10 CFU in 96.7% of samples tested.
Assuntos
Técnicas de Laboratório Clínico/métodos , Clostridioides difficile/isolamento & purificação , Infecções por Clostridium/diagnóstico , Fezes/microbiologia , Adolescente , Automação/métodos , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Técnicas de Diagnóstico Molecular/métodos , Sensibilidade e EspecificidadeRESUMO
Since the introduction of the Haemophilus influenzae type b vaccine, the incidence of invasive H. influenzae type b disease among children has fallen dramatically, but the effect on invasive H. influenzae disease among adults may be more complex. In this population-based study we examined the epidemiology and outcomes of invasive disease caused by typeable and nontypeable H. influenzae among Utah adults during 1998-2008. The overall incidence increased over the study period from 0.14/100,000 person-years in 1998 to 1.61/100,000 person-years in 2008. The average incidence in persons >65 years old was 2.74/100,000 person-years, accounting for 51% of cases and 67% of deaths. The incidence was highest for nontypeable H. influenzae (0.23/100,000 person-years), followed by H. influenzae type f (0.14/100,000 person-years). The case-fatality rate was 22%. The incidence of invasive H. influenzae in Utah adults appears to be increasing. Invasive H. influenzae infection disproportionately affected the elderly and was associated with a high mortality rate.
Assuntos
Bacteriemia/epidemiologia , Infecções por Haemophilus/epidemiologia , Haemophilus influenzae/patogenicidade , Adolescente , Adulto , Idoso , Bacteriemia/microbiologia , Bacteriemia/mortalidade , Infecções por Haemophilus/microbiologia , Infecções por Haemophilus/mortalidade , Haemophilus influenzae/classificação , Humanos , Incidência , Meningite por Haemophilus/epidemiologia , Meningite por Haemophilus/microbiologia , Meningite por Haemophilus/mortalidade , Pessoa de Meia-Idade , Sorotipagem , Utah/epidemiologia , Adulto JovemRESUMO
BACKGROUND: The incidence of invasive Haemophilus influenzae infection decreased dramatically since the introduction of the H. influenzae serotype b (Hib) conjugate vaccine. H. influenzae invasive disease continues to occur and cause significant morbidity and mortality in children aged <5 years. We aimed to report the epidemiology and serotypes of invasive H. influenzae disease in children from Utah in the post-Hib vaccine era. METHODS: We identified all cases of invasive H. influenzae disease, defined as H. influenzae isolated from a sterile site, during the period 1998-2008 among children aged <18 years who were living in Utah. RESULTS: We identified 91 cases of invasive H. influenzae disease in children. Children aged <5 years accounted for 78 cases (86%). H. influenzae serotype a (Hia) was the most common serotype (22 cases), representing 28% of all cases of invasive disease among children aged <5 years. The majority (15 cases [93%]) of Hib disease cases occurred among children aged <5 years and accounted for 18% of all cases of H. influenzae invasive disease in this age group. The mean incidence of Hia disease increased from 0.8 cases per 100,000 child-years in 1998 to 2.6 cases per 100,000 child-years in 2008. The incidence of Hib disease among children aged <5 years remained steady at 0.5 cases per 100,000 child-years. Bacteremia accounted for 61% of all cases of invasive disease. One-half (13 of 26) of cases of H. influenzae meningitis were due to Hia. CONCLUSIONS: H. influenzae continues to cause invasive disease in Utah children. Hia is the primary cause of the overall increased incidence of invasive H. influenzae disease and leads to disease similar to Hib. Isolated cases of Hib disease demonstrate a continued reservoir. The success of the Hib conjugate vaccine may therefore be vulnerable to vaccine shortages and refusal of vaccination.
Assuntos
Cápsulas Bacterianas/administração & dosagem , Infecções por Haemophilus/epidemiologia , Vacinas Anti-Haemophilus/administração & dosagem , Haemophilus influenzae/isolamento & purificação , Adolescente , Bacteriemia/epidemiologia , Bacteriemia/microbiologia , Cápsulas Bacterianas/genética , Criança , Pré-Escolar , Feminino , Infecções por Haemophilus/microbiologia , Infecções por Haemophilus/prevenção & controle , Haemophilus influenzae/classificação , Haemophilus influenzae/genética , Humanos , Incidência , Lactente , Masculino , Estudos Retrospectivos , Sorotipagem , Utah/epidemiologiaRESUMO
Guidelines recommend intrapartum antibiotic prophylaxis (IAP) for parturient women who have a screen positive for group B Streptococcus (GBS). Clindamycin should be used for IAP only if the maternal GBS isolate is susceptible. We report a case of clindamycin-resistant GBS disease in a newborn infant whose mother received clindamycin IAP, and we review clindamycin susceptibility testing.
Assuntos
Antibioticoprofilaxia , Clindamicina/uso terapêutico , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Infecções Estreptocócicas/prevenção & controle , Streptococcus agalactiae , Farmacorresistência Bacteriana , Feminino , Humanos , Recém-Nascido , Masculino , Testes de Sensibilidade Microbiana , Gravidez , Complicações Infecciosas na Gravidez/tratamento farmacológico , Infecções Estreptocócicas/tratamento farmacológico , Streptococcus agalactiae/efeitos dos fármacosRESUMO
BACKGROUND: Following widespread use of the Haemophilus influenzae serotype b (Hib) vaccine, H. influenzae serotype a (Hia) has emerged as an important pathogen in children in some regions. We describe the clinical features and molecular epidemiology of invasive Hia disease in children in Utah over an 11-year period. METHODS: We identified cases of invasive Hia disease, defined as detection of Hia from a normally sterile site, in children aged <18 years from Utah between 2007 and 2017. Medical records were reviewed to determine demographic characteristics and clinical outcomes. Available Hia isolates were genotyped using multilocus sequence typing, and phylogenetic division was determined using sodC polymerase chain reaction. Presence of the putative virulence-associated IS1016-bexA duplication-deletion was evaluated. RESULTS: We identified 51 children with invasive Hia. The average annual incidence was 1.7 cases per 100 000 children aged <5 years; 4.8 cases per 100 000 children aged <1 year. The median age was 11.3 months. The most common clinical presentation was meningitis (53%), followed by pneumonia (14%) and septic arthritis (14%). Twenty-two children (43%) required admission to an intensive care unit; 1 died. Sequence type (ST) 62, phylogenetic division II isolates caused 75% (21/28) of disease. No isolates contained the virulence-associated IS1016-bexA duplication-deletion. CONCLUSIONS: Hia is a significant cause of severe invasive bacterial infection in Utah. The majority of infections were caused by ST62 isolates, a phylogenetic division II Hia type that lacks the IS1016-bexA duplication-deletion. Hia ST62 has not been commonly reported elsewhere, suggesting a unique molecular epidemiology in our population.
Assuntos
Infecções por Haemophilus , Criança , Infecções por Haemophilus/epidemiologia , Haemophilus influenzae/genética , Humanos , Lactente , Epidemiologia Molecular , Filogenia , Sorogrupo , Utah/epidemiologiaRESUMO
BACKGROUND: Invasive Staphylococcus aureus infections are a common cause of morbidity and mortality in children. In the early 2000's the proportion of infections due the methicillin-resistant S. aureus (MRSA) increased rapidly. We described the clinical and molecular epidemiology of invasive S. aureus disease in a pediatric population. METHODS: We prospectively identified children in Utah with invasive S. aureus infections. Medical records were reviewed to determine diagnosis and clinical characteristics. Isolates were genotyped using multi-locus sequence typing. The presence of genes encoding the Panton-Valentine leukocidin (PVL) was determined using polymerase chain reaction. RESULTS: Over a 4-year period between January 2009 and December 2012, we identified 357 children, hospitalized at Primary Children's Hospital, with invasive S. aureus infections and isolates available for the study. Methicillin-susceptible S. aureus (MSSA) caused 79% of disease, while MRSA caused only 21% of disease. Mortality associated with invasive S. aureus infection was 3.6%. The most common diagnoses were osteoarticular infections (38%) followed by central line associated blood stream infections (19%) and pneumonia (12%). We identified 41 multi-locus sequence types. The majority of isolates belonged to 6 predominant clonal complexes (CC5, CC8, CC15, CC30, CC45, CC59). PVL was present in a minority (16%) of isolates, of which most were ST8 MRSA. CONCLUSIONS: MSSA was the primary cause of invasive S. aureus infections at our institution throughout the study period. A limited number of predominant strains accounted for the majority of invasive disease. The classic virulence factor PVL was uncommon in MSSA isolates. Further study is needed to improve our understanding of S. aureus virulence and disease pathogenesis.
Assuntos
Staphylococcus aureus Resistente à Meticilina/isolamento & purificação , Infecções Estafilocócicas/epidemiologia , Staphylococcus aureus/genética , Antibacterianos/uso terapêutico , Técnicas de Tipagem Bacteriana/métodos , Criança , Pré-Escolar , Feminino , Genótipo , Humanos , Masculino , Staphylococcus aureus Resistente à Meticilina/genética , Staphylococcus aureus Resistente à Meticilina/patogenicidade , Testes de Sensibilidade Microbiana , Epidemiologia Molecular/métodos , Tipagem de Sequências Multilocus/métodos , Infecções Estafilocócicas/genética , Staphylococcus aureus/patogenicidade , Utah/epidemiologia , Fatores de Virulência/genéticaRESUMO
BACKGROUND: In 2014, enterovirus D68 (EV-D68) was responsible for an outbreak of severe respiratory illness in children, with 1,153 EV-D68 cases reported across 49 states. Despite this, there is no commercial assay for its detection in routine clinical care. BioFire® Syndromic Trends (Trend) is an epidemiological network that collects, in near real-time, deidentified. BioFire test results worldwide, including data from the BioFire® Respiratory Panel (RP). OBJECTIVES: Using the RP version 1.7 (which was not explicitly designed to differentiate EV-D68 from other picornaviruses), we formulate a model, Pathogen Extended Resolution (PER), to distinguish EV-D68 from other human rhinoviruses/enteroviruses (RV/EV) tested for in the panel. Using PER in conjunction with Trend, we survey for historical evidence of EVD68 positivity and demonstrate a method for prospective real-time outbreak monitoring within the network. STUDY DESIGN: PER incorporates real-time polymerase chain reaction metrics from the RPRV/EV assays. Six institutions in the United States and Europe contributed to the model creation, providing data from 1,619 samples spanning two years, confirmed by EV-D68 gold-standard molecular methods. We estimate outbreak periods by applying PER to over 600,000 historical Trend RP tests since 2014. Additionally, we used PER as a prospective monitoring tool during the 2018 outbreak. RESULTS: The final PER algorithm demonstrated an overall sensitivity and specificity of 87.1% and 86.1%, respectively, among the gold-standard dataset. During the 2018 outbreak monitoring period, PER alerted the research network of EV-D68 emergence in July. One of the first sites to experience a significant increase, Nationwide Children's Hospital, confirmed the outbreak and implemented EV-D68 testing at the institution in response. Applying PER to the historical Trend dataset to determine rates among RP tests, we find three potential outbreaks with predicted regional EV-D68 rates as high as 37% in 2014, 16% in 2016, and 29% in 2018. CONCLUSIONS: Using PER within the Trend network was shown to both accurately predict outbreaks of EV-D68 and to provide timely notifications of its circulation to participating clinical laboratories.
Assuntos
Surtos de Doenças , Enterovirus Humano D , Infecções por Enterovirus/diagnóstico , Infecções por Enterovirus/epidemiologia , Infecções Respiratórias/diagnóstico , Infecções Respiratórias/epidemiologia , Algoritmos , Criança , Infecções por Enterovirus/virologia , Monitoramento Epidemiológico , Europa (Continente)/epidemiologia , Humanos , Infecções Respiratórias/virologia , Sensibilidade e Especificidade , Estados Unidos/epidemiologiaRESUMO
BACKGROUND: Febrile infants with viral respiratory infections have a reduced risk of bacterial infection compared with virus-negative infants. The risk of concomitant bacterial infection in febrile infants positive for human rhinovirus (HRV) by polymerase chain reaction (PCR) is unknown. METHODS: Infants 1-90 days old managed using the care process model for well-appearing febrile infants and with respiratory viral testing by PCR (RVPCR) in the emergency department or inpatient setting of 22 hospitals in the Intermountain Healthcare system from 2007-2016 were identified. Relative risk (RR) of bacterial infection was calculated for infants with HRV, non-HRV viruses, or no virus detected. RESULTS: Of 10 964 febrile infants identified, 4037 (37%) had RVPCR. Of these, 2212 (55%) were positive for a respiratory virus; 1392 (35%) for HRV alone. Bacterial infection was identified in 9.5%. Febrile infants with HRV detected were more likely to have bacterial infection than those with non-HRV viruses (7.8% vs 3.7%; P < .001; RR 2.12 [95% CI 1.43-3.15]). Risk of urinary tract infection was not significantly different for HRV-positive infants at any age, nor was risk of invasive bacterial infection (IBI; bacteremia and/or meningitis) meaningfully different for infants 1-28 day olds. Infants 29-90 days old with HRV had a decreased likelihood of IBI (RR 0.52 [95% CI 0.34-0.80]). CONCLUSIONS: HRV is common in febrile infants. Detection did not alter risk of concomitant urinary tract infection at any age or risk of IBI in infants 1-28 days old. HRV detection may be relevant in considering risk of IBI for infants 29-90 days of age.
Assuntos
Infecções Bacterianas/complicações , Febre de Causa Desconhecida/virologia , Infecções por Picornaviridae/complicações , Rhinovirus/isolamento & purificação , Infecções Bacterianas/diagnóstico , Feminino , Febre de Causa Desconhecida/microbiologia , Humanos , Lactente , Recém-Nascido , Masculino , Estudos RetrospectivosRESUMO
BACKGROUND: Health care and public health professionals rely on accurate, real-time monitoring of infectious diseases for outbreak preparedness and response. Early detection of outbreaks is improved by systems that are comprehensive and specific with respect to the pathogen but are rapid in reporting the data. It has proven difficult to implement these requirements on a large scale while maintaining patient privacy. OBJECTIVE: The aim of this study was to demonstrate the automated export, aggregation, and analysis of infectious disease diagnostic test results from clinical laboratories across the United States in a manner that protects patient confidentiality. We hypothesized that such a system could aid in monitoring the seasonal occurrence of respiratory pathogens and may have advantages with regard to scope and ease of reporting compared with existing surveillance systems. METHODS: We describe a system, BioFire Syndromic Trends, for rapid disease reporting that is syndrome-based but pathogen-specific. Deidentified patient test results from the BioFire FilmArray multiplex molecular diagnostic system are sent directly to a cloud database. Summaries of these data are displayed in near real time on the Syndromic Trends public website. We studied this dataset for the prevalence, seasonality, and coinfections of the 20 respiratory pathogens detected in over 362,000 patient samples acquired as a standard-of-care testing over the last 4 years from 20 clinical laboratories in the United States. RESULTS: The majority of pathogens show influenza-like seasonality, rhinovirus has fall and spring peaks, and adenovirus and the bacterial pathogens show constant detection over the year. The dataset can also be considered in an ecological framework; the viruses and bacteria detected by this test are parasites of a host (the human patient). Interestingly, the rate of pathogen codetections, on average 7.94% (28,741/362,101), matches predictions based on the relative abundance of organisms present. CONCLUSIONS: Syndromic Trends preserves patient privacy by removing or obfuscating patient identifiers while still collecting much useful information about the bacterial and viral pathogens that they harbor. Test results are uploaded to the database within a few hours of completion compared with delays of up to 10 days for other diagnostic-based reporting systems. This work shows that the barriers to establishing epidemiology systems are no longer scientific and technical but rather administrative, involving questions of patient privacy and data ownership. We have demonstrated here that these barriers can be overcome. This first look at the resulting data stream suggests that Syndromic Trends will be able to provide high-resolution analysis of circulating respiratory pathogens and may aid in the detection of new outbreaks.