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Leber AL. Maternal and congenital human cytomegalovirus infection: laboratory testing for detection and diagnosis. J Clin Microbiol 2024; 62:e0031323. [PMID: 38391188 PMCID: PMC11005381 DOI: 10.1128/jcm.00313-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024] Open
Abstract
Human cytomegalovirus (CMV) is the leading cause of congenital infection worldwide and the most common cause of non-genetic sensorineural hearing loss. As there is no vaccine or other specific intervention to prevent congenital CMV infection, there is a need to identify maternal and congenital infections with sensitive and specific testing as early as possible. There is no widely accepted practice for screening during pregnancy or in all newborns for identification of possible cases of congenital CMV. Currently, screening during pregnancy is limited to those identified as at risk followed by fetal and/or neonatal testing when congenital infection is suspected. This review focuses primarily on the current status of laboratory testing for diagnosis of maternal and congenital CMV infections. Primary maternal infection is best diagnosed using serologic testing, including CMV IgM, IgG, and avidity testing, while fetal infection should be assessed by nucleic acid amplification testing (NAAT) of amniotic fluid. Urine and saliva NAATs are the mainstay for diagnosis of congenital CMV in the first 3 weeks of life. Testing of dried blood spots can be useful for diagnosis of congenital CMV outside of the newborn period. The gaps in knowledge such as the prognostic value of viral loads in various sample types are addressed.
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Affiliation(s)
- Amy L. Leber
- Departments of Pathology and Laboratory Medicine and Pediatrics, Nationwide Children’s Hospital, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
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Fonseca-Romero P, Ahmed SM, Brintz BJ, Vierkant DM, Bard JD, Cohen DM, Festekjian A, Leber AL, Jackson JT, Kanwar N, Larsen C, Selvarangan R, Chapin KC, Pavia AT. Etiologies of bloody diarrhea in children presenting with acute gastroenteritis to US emergency departments. medRxiv 2024:2024.04.03.24305279. [PMID: 38633774 PMCID: PMC11023649 DOI: 10.1101/2024.04.03.24305279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Among 111 children presenting with bloody diarrhea in a multicenter study of molecular testing in US emergency departments, we found viral pathogens in 18%, bacteria in 48%, protozoa in 2%, and no pathogens detected in 38%.
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Affiliation(s)
- Paola Fonseca-Romero
- Department of Pathology, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Sharia M Ahmed
- Department of Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Ben J Brintz
- Department of Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - D Matthew Vierkant
- Department of Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Jennifer Dien Bard
- Children's Hospital, Los Angeles; Keck School of Medicine, University of Southern California, Los Angeles, CA, US
| | - Daniel M Cohen
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
| | - Ara Festekjian
- Children's Hospital, Los Angeles; Keck School of Medicine, University of Southern California, Los Angeles, CA, US
| | - Amy L Leber
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
| | | | | | - Chari Larsen
- Department of Pediatrics, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
| | | | - Kimberle C Chapin
- Deepull, Barcelona, Spain
- Warren Alpert Medical School, Brown University, Providence, RI, USA
| | - Andrew T Pavia
- Department of Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Pediatrics, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, USA
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Pavia AT, Cohen DM, Leber AL, Daly JA, Jackson JT, Selvarangan R, Kanwar N, Bender JM, Dien Bard J, Festekjian A, Duffy S, Larsen C, Holmberg KM, Bardsley T, Haaland B, Bourzac KM, Stockmann C, Chapin KC, Leung DT. Clinical Impact of Multiplex Molecular Diagnostic Testing in Children With Acute Gastroenteritis Presenting to an Emergency Department: A Multicenter Prospective Study. Clin Infect Dis 2024; 78:573-581. [PMID: 38097379 PMCID: PMC10954335 DOI: 10.1093/cid/ciad710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Indexed: 12/26/2023] Open
Abstract
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.
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Affiliation(s)
- Andrew T Pavia
- Departments of Pediatrics and Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Daniel M Cohen
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Amy L Leber
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Judy A Daly
- Department of Pathology, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | | | | | - Neena Kanwar
- Children's Mercy Hospital, Kansas City, Missouri, USA
| | - Jeffrey M Bender
- Children's Hospital of Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Jennifer Dien Bard
- Children's Hospital of Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Ara Festekjian
- Children's Hospital of Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Susan Duffy
- Department of Emergency Medicine, Hasbro Children's Hospital, Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - Chari Larsen
- Departments of Pediatrics and Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | | | - Tyler Bardsley
- Department of Population Health Sciences, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Benjamin Haaland
- Department of Population Health Sciences, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | | | - Christopher Stockmann
- Departments of Pediatrics and Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Kimberle C Chapin
- Department of Pathology and Laboratory Medicine, Rhode Island Hospital, Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - Daniel T Leung
- Departments of Pediatrics and Internal Medicine, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
- Department of Pathology, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, Utah, USA
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Cao RG, Mejias A, Leber AL, Wang H. Clinical and molecular characteristics of the 2022 Enterovirus-D68 outbreak among hospitalized children, Ohio, USA. J Clin Virol 2023; 169:105618. [PMID: 37977074 DOI: 10.1016/j.jcv.2023.105618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/17/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Enterovirus-D68 (EV-D68) has appeared biennially in the United States following the 2014 outbreak. It has gained epidemiologic and clinical relevance and was identified as an important pathogen associated with severe respiratory and central nervous system diseases. We aim to describe the clinical and molecular characteristics of the post-pandemic 2022 Enterovirus-D68 outbreak in children evaluated in a tertiary pediatric hospital in Columbus, Ohio. METHODS EV-D68 RT-PCR was performed on nasopharyngeal specimens collected during Jun-Nov 2022 from children (<18 years), identified by 1) physician-order or 2) random selection of 10-15 specimens weekly that were Rhinovirus/Enterovirus-positive by physician-ordered respiratory virus panel. Patients who tested positive for EV-D68 were identified and clinical data and outcomes were analyzed. Partial viral VP1 region was sequenced and characterized. RESULTS Forty-four children positive for EV-D68 were identified, among which 88.6 % of patients presented with respiratory symptoms and 61.4 % required PICU admission. Two patients presented with AFM that was attributed to EV-D68. EV-D68 sequences from 2022 clustered within the B3 subclade. CONCLUSIONS A significant proportion of children identified with EV-D68 during the 2022 outbreak had respiratory compromise requiring PICU admission. As the virus continues evolving, it is important to monitor the activity of EV-D68, characterizing these strains clinically and genetically, which will help to understand the viral pathogenicity and virulence.
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Affiliation(s)
- Raquel Giacomelli Cao
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, United States of America
| | - Asuncion Mejias
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, United States of America
| | - Amy L Leber
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, United States of America; Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, United States of America; Department of Pathology, The Ohio State University, Columbus, Ohio, United States of America
| | - Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, United States of America; Department of Pathology, The Ohio State University, Columbus, Ohio, United States of America.
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Wang H, Tomatis-Souverbielle C, Everhart K, Oyeniran SJ, Leber AL. Detection of human herpesvirus 6 in pediatric CSF samples: causing disease or incidental distraction? Diagn Microbiol Infect Dis 2023; 107:116029. [PMID: 37527599 DOI: 10.1016/j.diagmicrobio.2023.116029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 07/13/2023] [Accepted: 07/15/2023] [Indexed: 08/03/2023]
Abstract
Interpretation of human herpesvirus type 6 (HHV6) detection in the cerebrospinal fluid (CSF) of children can be complex; the virus can cause acute infection, reactivation, or can be inherited chromosomally integrated (iciHHV6). Our objectives were to determine the prevalence of HHV6 including iciHHV6 in CSF and compare the clinical and laboratory characteristics with and without iciHHV6 in our patient population. Overall, the prevalence of HHV6 and iciHHV6 was 2.4% and 0.85%, respectively. Children with iciHHV6 were significantly younger and less likely to present with fever. Septic infants (≤60 days) accounted for 65.2% (15/23) of the iciHHV6 patients. Patients with iciHHV6 had higher viral loads in CSF and whole blood. Twenty-one (91.3%) patients with iciHHV6 and 12 (33.3%) without ici-HHV6 were determined to have an incidental detection of HHV6 not associated with presenting symptoms. Molecular detection of HHV6 in CSF is not always associated with HHV6 infection and may represent iciHHV6 particularly in infants evaluated for sepsis.
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Affiliation(s)
- Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA; Department of Pathology, The Ohio State University, Columbus, OH, USA
| | - Cristina Tomatis-Souverbielle
- Division of Infectious Diseases, Department of Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, USA
| | - Kathy Everhart
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - Sophonie J Oyeniran
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA; Department of Pathology, The Ohio State University, Columbus, OH, USA
| | - Amy L Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA; Division of Infectious Diseases, Department of Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, USA; Department of Pathology, The Ohio State University, Columbus, OH, USA.
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Oyeniran SJ, Wang H, Everhart K, Mack K, Harvey K, Leber AL. Performance comparison of three commercial tests for the detection of SARS-CoV-2 antibodies in a common set of pediatric samples. J Immunol Methods 2023; 520:113536. [PMID: 37567470 DOI: 10.1016/j.jim.2023.113536] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/26/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
BACKGROUND Serologic testing for SARS CoV-2 is useful for detection of past infection and assisting in diagnosis of post-COVID-19 syndromes such as MIS-C. Immune responses to SARS-CoV-2 infection in children differ from adults but most antibody performance studies are limited to adults. OBJECTIVE The objective of this study was to compare three commercial SARS-CoV-2 antibody kits in a common set of children being evaluated for SARS-CoV-2 infection. METHODS Three SARS-CoV-2 antibody tests: Abbott anti-nucleocapsid (N) IgG (AA), Epitope Diagnostics anti-N IgG (EDI) and EUROIMMUN anti-S1 Spike IgG (EU) were compared against two references: 1) RT-PCR and 2) consensus IgG (consIgG). RESULTS All three tests had a sensitivity <53% compared to RT-PCR, with EU outperforming EDI (p = 0.03). When all samples were compared to consIgG, positive percent agreement was comparable (AA-90%, EU- 98% and EDI- 88%) but EDI had significantly better negative percent agreement than EU (p = 0.009). No difference in test performance was observed using either reference when samples were collected ≥15 days post-symptom onset (PSO). CONCLUSIONS Our findings suggest good performance of commercial SARS-CoV-2 IgG assays in pediatric patients with samples collected ≥15 days PSO. Additional studies investigating antibody response and assay performance in children are warranted.
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Affiliation(s)
- Sophonie J Oyeniran
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America; Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, United States of America.
| | - Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America; Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, United States of America
| | - Kathy Everhart
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America
| | - Kathy Mack
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America
| | - Kevin Harvey
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America
| | - Amy L Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH 43205, United States of America; Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, United States of America
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Pavia AT, Cohen DM, Leber AL, Daly JA, Jackson JT, Selvarangan R, Kanwar N, Bender JM, Bard JD, Festekjian A, Duffy S, Larsen C, Holmberg KM, Bardsley T, Haaland B, Bourzac KM, Stockmann C, Chapin KC, Leung DT. Clinical Impact of Multiplex Molecular Diagnostic Testing in Children with Acute Gastroenteritis Presenting to An Emergency Department: A Multicenter Prospective Study. medRxiv 2023:2023.07.27.23293208. [PMID: 37577483 PMCID: PMC10418295 DOI: 10.1101/2023.07.27.23293208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
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.
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Dunn JJ, Selvarangan R, Maggert K, Young S, Leber AL. Multicenter Evaluation of the DiaSorin Molecular Simplexa Congenital CMV Direct PCR Test on Neonatal Saliva and Urine Specimens. J Clin Microbiol 2023; 61:e0028323. [PMID: 37184403 PMCID: PMC10281109 DOI: 10.1128/jcm.00283-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/24/2023] [Indexed: 05/16/2023] Open
Abstract
Cytomegalovirus (CMV) is the most common virus associated with congenital infection worldwide and is a major cause of sensorineural hearing loss (SNHL) and developmental delay. Up to 90% of infants with congenital CMV (cCMV) infection are asymptomatic at birth, making the diagnosis challenging. Postnatal diagnosis involves testing newborn saliva and/or urine collected before 21 days of life to confirm cCMV infection. This multicenter study evaluated the performance of the Simplexa Congenital CMV Direct real-time PCR assay for the qualitative detection of CMV in newborn saliva (n = 2,023) and urine (n = 1,797) specimens. Compared to two PCR/bidirectional sequencing assays, the Simplexa Congenital CMV Direct assay demonstrated positive percent agreement (PPA) and negative percent agreement (NPA) of 98.6% and 99.9%, respectively, for saliva samples and a PPA of 97.8% and an NPA of 99.9% for urine specimens. Overall concordance was κ = 0.98 or near perfect compared to the composite reference methods with both sample types. By 95% probit analysis, the limit of detection (LoD) using the AD-169 reference strain was 350 ± 12 copies/mL in urine. The LoDs of saliva swabs in either 1 mL or 3 mL of transport medium were 274 ± 12 copies/mL and 300 ± 14 copies/mL, respectively. The Simplexa Congenital CMV Direct assay can be applied to both saliva and urine specimens collected from newborns less than 21 days of age to rapidly and reliably identify CMV infection.
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Affiliation(s)
| | | | | | - Stephen Young
- TriCore Reference Laboratories, Albuquerque, New Mexico, USA
| | - Amy L. Leber
- Nationwide Children’s Hospital, Columbus, Ohio, USA
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Ben-Shimol S, Ramilo O, Leber AL, van der Beek BA, Everhart K, Mertz S, Mejias A, Dagan R. A Hypothesis-Generating Prospective Longitudinal Study to Assess the Relative Contribution of Common Respiratory Viruses to Severe Lower Respiratory Infections in Young Children. Pediatr Infect Dis J 2023; 42:396-404. [PMID: 36917029 DOI: 10.1097/inf.0000000000003865] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
BACKGROUND Respiratory viruses such as respiratory syncytial virus (RSV), influenza, parainfluenza and human metapneumovirus are well-established etiologies of acute lower respiratory tract infections (ALRIs; LRI-viruses). In contrast, adenovirus (AdV), rhinovirus/enterovirus (RV/EV) and seasonal human coronaviruses (CoV), collectively termed AdV/RV/CoV, are detected both in healthy children and children with ALRI. METHODS The methods include a prospective longitudinal case-control study, assessing the prevalence of LRI-viruses versus AdV/RV/CoV in ALRI [community-acquired alveolar pneumonia (CAAP) and bronchiolitis] during hospitalization (visit 1), 7-14 days (visit 2) and 28-35 days (visit 3) in 2-17-month-old children. Controls were 2-27-month-old children hospitalized for elective surgery during the same respiratory seasons. RESULTS We enrolled 99 infants (37 CAAP, 38 bronchiolitis and 24 controls) and obtained 211 nasopharyngeal swabs. Overall, 163 (77%) had greater than or equal to 1 viruses detected; RV/EV (n = 94; 45%) and RSV (n = 71; 34%) were the most frequently detected viruses. In CAAP, the overall LRI-virus prevalence was 78.4%, 32.4% and 5.4% in visits 1, 2 and 3, respectively; the respective rates in bronchiolitis were 73.7%, 34.5% and 8.0%. In controls, no LRI-viruses were detected. In contrast, the overall AdV/RV/CoV prevalence was high among controls (70.8%) and similar among CAAP (48.6%, 40.5% and 40.5%) and bronchiolitis (47.4, 58.6% and 64.0%) across visits. CONCLUSIONS Among ALRI cases, LRI-viruses dominated during the acute disease, with prevalence declining within 28-35 days, suggesting their causative role. In contrast, AdV/RV/CoV prevalence was similar during all 3 visits and in controls, suggesting that carriage of these viruses is common during the viral respiratory season. The current study is relatively small and of short duration; however, the findings are supported by other recent studies.
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Affiliation(s)
- Shalom Ben-Shimol
- From the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
- Pediatric Infectious Disease Unit, Soroka University Medical Center, Beer Sheva, Israel
| | - Octavio Ramilo
- Division of Pediatric Infectious Diseases and Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio
- The Ohio State University, Columbus, Ohio
| | - Amy L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio
| | - Bart Adriaan van der Beek
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Kathy Everhart
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio
| | - Sara Mertz
- Division of Pediatric Infectious Diseases and Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio
- The Ohio State University, Columbus, Ohio
| | - Asuncion Mejias
- Division of Pediatric Infectious Diseases and Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio
- The Ohio State University, Columbus, Ohio
| | - Ron Dagan
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
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Wang H, Wright T, Everhart K, Oyeniran SJ, Mejias A, Leber AL. SARS-CoV-2 reinfection with different SARS-CoV-2 variants in children, Ohio, US. J Pediatric Infect Dis Soc 2023; 12:198-204. [PMID: 37004190 DOI: 10.1093/jpids/piad017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/31/2023] [Indexed: 04/03/2023]
Abstract
BACKGROUND Beginning in late 2021 we observed a significant increase in SARS-CoV-2 reinfections in pediatric patients evaluated at our institution. We aimed to characterize the children with SARS-CoV-2 reinfection, to determine the number of SARS-CoV-2 reinfections and characterize the intervals between two infections in our patient population. METHODS From March 2020 to September 2022, we identified children ≤ 21 years old who had ≥2 SARS-CoV-2 infections using laboratory reports. We then defined the type of SARS-CoV-2 variant in the first and subsequent infections by mutation specific typing or local epidemiology data. Clinical outcomes and interval between SARS-CoV-2 infections were assessed. RESULTS We identified 541 children with ≥ 2 SARS-CoV-2 infections. The median interval between two infections was 229 days. The hospitalization rate was lower in the second infection. Reinfection counts were higher during the periods that Omicron variants predominated. Reinfection occurred more rapidly when Omicron variants were circulating with some occurring in less than 90 days. CONCLUSION As SARS-CoV-2 continues to evolve, there is a need for ongoing surveillance to identify the frequency and time interval between reinfections and to re-evaluate the definition of SARS-CoV-2 reinfections.
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Affiliation(s)
- Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Tori Wright
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Kathy Everhart
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Sophonie J Oyeniran
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Asuncion Mejias
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University, Columbus, Ohio, USA
- Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Amy L Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
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Halabi KC, Wang H, Leber AL, Sánchez PJ, Ramilo O, Mejias A. Respiratory syncytial virus and SARS-CoV-2 coinfections in children. Pediatr Pulmonol 2022; 57:3158-3160. [PMID: 35997032 PMCID: PMC9538042 DOI: 10.1002/ppul.26127] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/09/2022] [Accepted: 08/21/2022] [Indexed: 01/11/2023]
Affiliation(s)
- Katia C Halabi
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Huanyu Wang
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Amy L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Pablo J Sánchez
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio, USA.,Center for Perinatal Research, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA.,Department of Pediatrics, Division of Neonatology, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Octavio Ramilo
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio, USA.,Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Asuncion Mejias
- Department of Pediatrics, Division of Infectious Diseases, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio, USA.,Center for Vaccines and Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
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12
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Quintero AM, Eisner M, Sayegh R, Wright T, Ramilo O, Leber AL, Wang H, Mejias A. Differences in SARS-CoV-2 Clinical Manifestations and Disease Severity in Children and Adolescents by Infecting Variant. Emerg Infect Dis 2022; 28:2270-2280. [PMID: 36285986 PMCID: PMC9622241 DOI: 10.3201/eid2811.220577] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Since the COVID-19 pandemic began, different SARS-CoV-2 variants have been identified and associated with higher transmissibility than the ancestral nonvariant strain. During January 1, 2021–January 15, 2022, we assessed differences in clinical and viral parameters in a convenience sample of COVID-19 outpatients and inpatients 0–21 years of age in Columbus, Ohio, USA, according to the infecting variant, identified using a mutation-specific reverse transcription PCR assay. Of the 676 patients in the study, 17.75% were infected with nonvariant strains, 18.49% with the Alpha variant, 41.72% with Delta, and 16.42% with Omicron. Rates of SARS-COV-2/viral co-infections were 15.66%–29.41% and were comparable across infecting variants. Inpatients with acute Delta and Omicron infections had lower SARS-CoV-2 cycle threshold values and more frequent fever and respiratory symptoms than those with nonvariant strain infections. In addition, SARS-COV-2/viral co-infections and the presence of underlying conditions were independently associated with worse clinical outcomes, irrespective of the infecting variant.
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13
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Mertz C, Glowinski R, Cohen SH, Mertz S, Ye F, Hall MW, Peeples ME, King T, Wang H, Leber AL, Sanchez PJ, Ramilo O, Mejias A. SARS-CoV-2 RNAemia and clinical outcomes in children with COVID-19. J Infect Dis 2021; 225:208-213. [PMID: 34618885 DOI: 10.1093/infdis/jiab491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/23/2021] [Indexed: 01/08/2023] Open
Abstract
The burden of COVID-19 in children represents a fraction of cases worldwide, yet a subset of those infected are at risk for severe disease. We measured plasma SARS-CoV-2 RNA in a cohort of 103 children hospitalized with COVID-19 with diverse clinical manifestations. SARS-CoV-2 RNAemia was detected in 27 (26%) of these children, lasted for a median of 6 [2-9] days, and it was associated with higher rates of oxygen administration, admission to the intensive care unit, and longer hospitalization.
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Affiliation(s)
- C Mertz
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - R Glowinski
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - S H Cohen
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - S Mertz
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - F Ye
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - M W Hall
- Department of Pediatrics, Division of Critical Care Medicine, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - M E Peeples
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - T King
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA
| | - H Wang
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - A L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - P J Sanchez
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital , and The Ohio State University College of Medicine, Columbus, OH, USA.,Department of Pediatrics, Division of Neonatology, Columbus, OH, USA.,Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University College of Medicine, Columbus, OH, USA
| | - O Ramilo
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA.,Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University College of Medicine, Columbus, OH, USA
| | - A Mejias
- Center for Vaccines and Immunity, The Abigail Wexner Research Institute at Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, OH, USA.,Division of Infectious Diseases, Nationwide Children's Hospital and The Ohio State University College of Medicine, Columbus, OH, USA
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14
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Diaz-Diaz A, Bunsow E, Garcia-Maurino C, Moore-Clingenpeel M, Naples J, Juergensen A, Mertz S, Wang H, Leber AL, Gern J, Hall MW, Cohen DM, Ramilo O, Mejias A. Nasopharyngeal Codetection of H. influenzae and S. pneumoniae and Respiratory Syncytial Virus Disease Outcomes in Children. J Infect Dis 2021; 225:912-923. [PMID: 34543409 DOI: 10.1093/infdis/jiab481] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/16/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The role of nasopharyngeal bacteria on RSV disease has been underestimated. We measured the frequency and quantitative detection of potentially pathogenic bacteria in the upper respiratory tract of infants with RSV infection over seven respiratory seasons, and their impact on clinical outcomes. METHODS Children <2 years old with mild (outpatients; n=115) or severe (inpatients; n=566) RSV infection, and matched healthy controls (n=161) were prospectively enrolled. Nasopharyngeal samples were obtained for RSV, S. pneumoniae, S. aureus, M. catarrhalis, and H. influenzae detection and quantitation by PCR. Multivariable models were constructed to identify variables predictive of severe disease. RESULTS S. pneumoniae, H. influenzae, and M. catarrhalis, but not S. aureus, were detected more frequently in RSV-infected children (84%) than healthy controls (46%; p<0.001). Detection of S. pneumoniae and/or H. influenzae was associated with fever, more frequent antibiotic treatment, worse radiologic findings, and higher neutrophil counts (p<0.01). In adjusted analyses S. pneumoniae/H. influenzae co-detection was associated with greater odds (OR; 95% CI) of hospitalization (2.25 [1.07-4.74), higher disease severity scores (1.93 [1.14-3.26]), prolonged oxygen administration (2.23 [1.01-4.91]), and longer hospitalization (2.53 [1.33-4.79]). CONCLUSIONS Nasopharyngeal co-detection of S. pneumoniae and H. influenzae in infants with RSV infection is associated with increased disease severity.
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Affiliation(s)
- Alejandro Diaz-Diaz
- Division of Infectious Diseases, Department of Pediatrics, Nationwide Children's Hospital-The Ohio State University College of Medicine, Columbus, OH, USA
| | - Eleonora Bunsow
- Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Cristina Garcia-Maurino
- Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Melissa Moore-Clingenpeel
- Biostatistics Resource Core, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Jeffrey Naples
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
| | - Alexis Juergensen
- Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Sara Mertz
- Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Huanyu Wang
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - Amy L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - James Gern
- Department of Pediatrics. University of Wisconsin, School of Medicine and Public Health. Madison WI, USA
| | - Mark W Hall
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
| | - Daniel M Cohen
- Division of Emergency Medicine, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA
| | - Octavio Ramilo
- Division of Infectious Diseases, Department of Pediatrics, Nationwide Children's Hospital-The Ohio State University College of Medicine, Columbus, OH, USA.,Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Asuncion Mejias
- Division of Infectious Diseases, Department of Pediatrics, Nationwide Children's Hospital-The Ohio State University College of Medicine, Columbus, OH, USA.,Center for Vaccines & Immunity, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
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15
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Wang H, Jean S, Eltringham R, Madison J, Snyder P, Tu H, Jones DM, Leber AL. Mutation-Specific SARS-CoV-2 PCR Screen: Rapid and Accurate Detection of Variants of Concern and the Identification of a Newly Emerging Variant with Spike L452R Mutation. J Clin Microbiol 2021; 59:e0092621. [PMID: 34011523 PMCID: PMC8288299 DOI: 10.1128/jcm.00926-21] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 05/13/2021] [Indexed: 12/19/2022] Open
Abstract
The emergence of more transmissible and/or more virulent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOC) has triggered intensive genomic surveillance, which is costly and difficult to sustain operationally over the long term. To address this problem, we developed a set of four multiplex mutation-specific PCR-based assays with same-day reporting that can detect five VOC and three variants of interest (VOI), as defined in the March 2021 guidelines from the U.S. Centers for Disease Control and Prevention (https://www.cdc.gov/coronavirus/2019-ncov/). The screening results were compared to the whole-genome sequencing (WGS) and showed 100% concordance for strain typing for B.1.1.7 (n = 25) and P.1 (n = 5) variants using spike (S) mutation S-N501Y, S-E484K, and S-H69-V70del assays. The S-L450R assay, designed to detect the B.1.427/429 VOC, also identified multiple isolates of a newly emerging multiply mutated B.1.526.1 variant that is now rapidly increasing in the eastern United States. PCR approaches can be easily adopted in clinical laboratories, providing rapid screening methods to allow early detection of newly emergent variants and to efficiently triage cases for full genomic sequencing.
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Affiliation(s)
- Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Sophonie Jean
- Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Richard Eltringham
- Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
| | - John Madison
- Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
| | - Pamela Snyder
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Huolin Tu
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Daniel M. Jones
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Amy L. Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, Ohio, USA
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
- Department of Pediatrics, The Ohio State University, Columbus, Ohio, USA
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16
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Wang H, Salamon D, Jean S, Leber AL. Evaluation of the Cepheid Xpert SA Nasal Complete for direct detection of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus in nasal swabs from pediatric patients. Diagn Microbiol Infect Dis 2021; 101:115417. [PMID: 34116341 DOI: 10.1016/j.diagmicrobio.2021.115417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 11/27/2022]
Abstract
Nasal carriers of Staphylococcus aureus (SA) are at increased risk for health-care associated infections with this organism. Timely detection of SA and Methicillin-resistant SA (MRSA) and subsequent decolonization are important components of infection control. While performance of nucleic acid amplification-based tests for detection of SA/MRSA in adults has been well-described, limited data are available in children. Our objective was to evaluate the performance of the Xpert SA in pediatric patients. Overall, for detection of SA, Xpert SA demonstrated a sensitivity and specificity of 95.1% and 93.5%, respectively and 87.8% sensitive and 98.1% specific for detection of MRSA. Performance in different age groups was similar but neonates had the lowest sensitivity and highest invalid rates. The Xpert SA is a rapid, reliable test to detect MSSA and MRSA nasal colonization in pediatric patients. Depending on the potential clinical impact, culture may be considered as a companion test to improve sensitivity.
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Affiliation(s)
- Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital; Department of Pathology, The Ohio State University, Columbus, OH
| | - Doug Salamon
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital
| | - Sophonie Jean
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital; Department of Pathology, The Ohio State University, Columbus, OH
| | - Amy L Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital; Department of Pathology, The Ohio State University, Columbus, OH; Department of Pediatrics, The Ohio State University, Columbus, OH.
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17
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Watson JR, Burch C, Leber AL. Surrogate testing of oral third-generation cephalosporin susceptibility to common uropathogens. Diagn Microbiol Infect Dis 2021; 99:115299. [PMID: 33460959 DOI: 10.1016/j.diagmicrobio.2020.115299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/23/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
Abstract
Cefazolin susceptibility of urine isolates of Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis predicts susceptibility to oral cephalosporins, but cefazolin-resistant isolates may be susceptible to oral third-generation cephalosporins. Among 194 urine isolates, we found >95% categorical agreement among oral third-generation cephalosporins. Surrogate testing of cefpodoxime for cefdinir, and vice versa, resulted in no major or very major errors, while combinations involving cefixime produced rare major and very major errors.
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Affiliation(s)
- Joshua R Watson
- Department of Pediatrics, The Ohio State University and Nationwide Children's Hospital, Columbus, OH, USA
| | - Cynthia Burch
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA
| | - Amy L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH, USA.
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18
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Nolte FS, Babady NE, Buchan BW, Capraro GA, Graf EH, Leber AL, McElvania E, Yao JDC. Responding to the Challenges of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2): Perspectives from the Association for Molecular Pathology Infectious Disease Subdivision Leadership. J Mol Diagn 2020; 22:968-974. [PMID: 32565306 PMCID: PMC7303040 DOI: 10.1016/j.jmoldx.2020.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/29/2020] [Accepted: 06/11/2020] [Indexed: 01/03/2023] Open
Abstract
Clinical molecular laboratory professionals are at the frontline of the response to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, providing accurate, high-quality laboratory results to aid in diagnosis, treatment, and epidemiology. In this role, we have encountered numerous regulatory, reimbursement, supply-chain, logistical, and systems challenges that we have struggled to overcome to fulfill our calling to provide patient care. In this Perspective from the Association for Molecular Pathology Infectious Disease Subdivision Leadership team, we review how our members have risen to these challenges, provide recommendations for managing the current pandemic, and outline the steps we can take as a community to better prepare for future pandemics.
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Affiliation(s)
- Frederick S Nolte
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina.
| | - N Esther Babady
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Clinical Microbiology Service, Departments of Laboratory Medicine and Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Blake W Buchan
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Department of Pathology, The Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Gerald A Capraro
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Carolinas Pathology Group, Atrium Health, Charlotte, North Carolina
| | - Erin H Graf
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Department of Laboratory Medicine and Pathology, Mayo Clinic Arizona, Scottsdale, Arizona
| | - Amy L Leber
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio
| | - Erin McElvania
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; NorthShore University HealthSystem, University of Chicago, Pritzker School of Medicine, Chicago, Illinois
| | - Joseph D C Yao
- The Infectious Disease Subdivision Leadership of the Association for Molecular Pathology, Rockville, Maryland; Yao Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
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19
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Kraft MT, Wilson J, Leber AL, Stukus DR, Scherzer R. Review of ordering practices for single-allergen and serum-specific Immunoglobulin E panel tests for food allergy. Ann Allergy Asthma Immunol 2020; 125:343-344. [PMID: 32474158 DOI: 10.1016/j.anai.2020.05.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 05/18/2020] [Accepted: 05/21/2020] [Indexed: 01/05/2023]
Affiliation(s)
- Monica T Kraft
- Division of Allergy and Immunology, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio.
| | - Jade Wilson
- Division of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio
| | - Amy L Leber
- Division of Pathology and Laboratory Medicine, Nationwide Children's Hospital, Columbus, Ohio
| | - David R Stukus
- Division of Allergy and Immunology, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio
| | - Rebecca Scherzer
- Division of Allergy and Immunology, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio
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20
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Wang H, Diaz A, Moyer K, Mele-Casas M, Ara-Montojo MF, Torrus I, McCoy K, Mejias A, Leber AL. Molecular and Clinical Comparison of Enterovirus D68 Outbreaks among Hospitalized Children, Ohio, USA, 2014 and 2018. Emerg Infect Dis 2019; 25:2055-2063. [PMID: 31454311 PMCID: PMC6810223 DOI: 10.3201/eid2511.190973] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Enterovirus D68 (EV-D68) causes respiratory tract infections and neurologic manifestations. We compared the clinical manifestations from 2 EV-D68 outbreaks in 2014 and 2018 and a low-activity period in 2016 among hospitalized children in central Ohio, USA, and used PCR and sequencing to enable phylogenetic comparisons. During both outbreak periods, infected children had respiratory manifestations that led to an increase in hospital admissions for asthma. The 2018 EV-D68 outbreak appeared to be milder in terms of respiratory illness, as shown by lower rates of pediatric intensive care unit admission. However, the frequency of severe neurologic manifestations was higher in 2018 than in 2014. During the same period in 2016, we noted neither an increase in EV-D68 nor a significant increase in asthma-related admissions. Phylogenetic analyses showed that EV-D68 isolates from 2018 clustered differently within clade B than did isolates from 2014 and are perhaps associated with a different EV-D68 subclade.
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21
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Russo ME, Kline J, Jaggi P, Leber AL, Cohen DM. 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. Pediatr Emerg Care 2019; 35:252-255. [PMID: 28562462 DOI: 10.1097/pec.0000000000001144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
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. For patients with a negative RADT and subsequent positive backup direct nucleic acid probe test, we recorded whether the patient was successfully notified of the positive result, the number of contact attempts, and the time to antibiotic prescription. RESULTS There were 6504 patients who had an RADT performed, of which 5474 (84.2%) were negative with a confirmatory test performed. There were 234 patients with positive confirmatory testing and not prescribed antibiotics at the time of the initial visit. Of these, 90.1% were ultimately contacted and prescribed appropriate antibiotics, whereas 7.3% were lost to follow-up and 2.6% had potentially unnecessary repeat visits. Of those contacted, 43.1% were reached only after multiple telephone calls or a letter. The median time from the negative RADT to the submission of an electronic prescription was 19.6 hours (interquartile range, 7.5-24.9 hours; range, 6-144 hours). CONCLUSIONS Although confirmatory testing after a negative RADT in children is currently the standard of care, this practice requires a substantial amount of work. Furthermore, a significant fraction of patients are lost to follow-up or have unnecessary repeat visits.
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Affiliation(s)
| | | | | | - Amy L Leber
- Department of Laboratory Medicine, Nationwide Children's Hospital, Columbus, OH
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22
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Wang H, Hecht S, Kline D, Leber AL. Staphylococcus aureus and methicillin resistance detection directly from pediatric samples using PCR assays with differential cycle threshold values for corroboration of methicillin resistance. J Microbiol Methods 2019; 159:167-173. [PMID: 30826439 DOI: 10.1016/j.mimet.2019.01.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 01/15/2019] [Accepted: 01/20/2019] [Indexed: 01/13/2023]
Abstract
Staphylococcus aureus is a major human pathogen, causing a variety of nosocomial and community-acquired infections. While S. aureus usually grows well, there are situations where it cannot be isolated in culture, such as patients who have received prior antimicrobial therapy. There are commercially available tests for molecular identification of S. aureus and methicillin resistance; however, they often have limited utility due to restrictive specimen requirements, lack of data in pediatric populations and issues with specificity for methicillin resistance detections. Our objective was to evaluate the performance of laboratory-developed PCR assays that detect S. aureus and methicillin resistance directly from various specimen types. We developed two real-time PCR assays: 1) a singleplex assay targeting the nucA gene and 2) a multiplex PCR assay (mecA/SCC-orf PCRs) that detects the mecA gene and the conjunction region where SCCmec elements insert into the genome. A total of 538 pediatric specimens, including specimens from the lower respiratory tract (n = 149), abscess/wounds (n = 245), tissue and body fluids (n = 144), were tested and the results compared with culture and susceptibility testing. The nucA PCR is sensitive and specific for detection of S. aureus when compared with culture with an overall agreement of 93.1% and sensitivity and specificity of 93.5% and 93.0%, respectively. Among those culture-confirmed and nucA PCR positive specimens (n = 145), concordance between mecA/SCC-orf PCRs, using cycle threshold values for corroboration, and conventional methods was 98.6% and the sensitivity and specificity were 97.3% and 100%, respectively. The assays' performance suggests they are rapid, reliable tools to detect and differentiate between methicillin susceptible and methicillin resistant S. aureus in our pediatric patient population providing diagnostic impact when used in conjunction with culture.
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Affiliation(s)
- Huanyu Wang
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, United States of America
| | - Shaina Hecht
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, United States of America
| | - David Kline
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, United States of America
| | - Amy L Leber
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital and The Ohio State University, Columbus, OH, United States of America.
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23
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Blaschke AJ, Holmberg KM, Daly JA, Leber AL, Dien Bard J, Korgenski EK, Bourzac KM, Kanack KJ. Retrospective Evaluation of Infants Aged 1 to 60 Days with Residual Cerebrospinal Fluid (CSF) Tested Using the FilmArray Meningitis/Encephalitis (ME) Panel. J Clin Microbiol 2018; 56:e00277-18. [PMID: 29669791 PMCID: PMC6018345 DOI: 10.1128/jcm.00277-18] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 04/14/2018] [Indexed: 01/02/2023] Open
Abstract
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.
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Affiliation(s)
- Anne J Blaschke
- University of Utah School of Medicine, Department of Pediatrics, Division of Pediatric Infectious Diseases, Salt Lake City, Utah, USA
| | | | - Judy A Daly
- Primary Children's Hospital, Salt Lake City, Utah, USA
| | - Amy L Leber
- Nationwide Children's Hospital, Columbus, Oklahoma, USA
| | | | - Ernest K Korgenski
- University of Utah School of Medicine, Department of Pediatrics, Division of Pediatric Infectious Diseases, Salt Lake City, Utah, USA
- Pediatric Clinical Program, Intermountain Healthcare, Salt Lake City, Utah, USA
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Selvaraju SB, Tierney D, Leber AL, Patel A, Earley AK, Jaiswal D, Menegus MA. Influenza and respiratory syncytial virus detection in clinical specimens without nucleic acid extraction using FOCUS direct disc assay is substantially equivalent to the traditional methods and the FOCUS nucleic acid extraction-dependent RT-PCR assay. Diagn Microbiol Infect Dis 2013; 78:232-6. [PMID: 24360265 DOI: 10.1016/j.diagmicrobio.2013.11.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 11/12/2013] [Accepted: 11/18/2013] [Indexed: 11/18/2022]
Abstract
In this study, we evaluated FOCUS diagnostic's Flu A/B & RSV direct kit (Direct Disc assay), designed to detect influenza (FLU) and respiratory syncytial viruses (RSV) directly in clinical specimens without nucleic acid extraction. This novel 'sample-to-answer', nucleic acid extraction-independent assay uses a unique disc to process, amplify, and detect viral targets in up to 8 specimens at a time. The performance of this assay for detecting FLU and RSV viruses was compared to the traditional methods (culture and/or direct florescent antibody testing) using 945 nasopharyngeal swab specimens. In addition, a total of 150 consecutive clinical specimens positive for FLU (FLU A=50, FLU B=50) or RSV (n=50) were tested in parallel using the novel Direct Disc assay and FOCUS diagnostic's nucleic acid extraction-dependent assay to assess their relative performance. Compared to the traditional methods, the overall (prospective+retrospective) positive/negative percent agreement was determined to be 96.6%/98.1% for FLU A, 98.4%/99.9% for FLU B, and 99.3%/98.8% for RSV. Compared to the nucleic acid extraction-dependent assay, the positive percent agreement was 90% (n=45/50) for FLU A, 92% (n=46/50) for FLU B, and 98% (n=49/50) for RSV. Overall, the Direct Disc assay showed good agreement with both traditional methods and nucleic acid extraction-dependent assay. Although we encountered some failures compared to the nucleic acid extraction-dependent assay, these limitations must be balanced against the substantial advantages of the extraction-free nature of this assay and rapid turnaround time.
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Affiliation(s)
| | | | - Amy L Leber
- Nationwide Children's Hospital, Columbus, OH, USA
| | - Anami Patel
- Le Bonheur Children's Medical Center, Memphis, TN, USA
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Abstract
The Centers for Disease Control and Prevention recommends nucleic acid amplification testing for chlamydia and gonorrhea in sexually abused girls. No studies describe performance of APTIMA Combo 2 Assay with second target confirmation on the same testing platform. This nucleic acid amplification testing is evaluated within a large child advocacy center. Girls 3 to 18 years, 35% of whom reported consensual sexual activity, were prospectively tested by APTIMA Combo 2 on urine/vaginal swabs and by vaginal culture. A case of infection was defined as positive culture or positive urine or vaginal swab nucleic acid amplification testing with second target confirmation. Sensitivity of APTIMA Combo 2 on urine was found to be superior to vaginal culture and comparable to APTIMA Combo 2 on vaginal swabs for both infections. APTIMA Combo 2 on urine is less invasive, and its use may be preferred in this traumatized population.
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Affiliation(s)
- M Ranee Leder
- Center for Family Safety and Healing, Nationwide Children's Hospital, Columbus, Ohio 43205, USA.
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Prince HE, Leber AL. Comparison of complement fixation and hemagglutination inhibition assays for detecting antibody responses following influenza virus vaccination. Clin Diagn Lab Immunol 2003; 10:481-2. [PMID: 12738654 PMCID: PMC154979 DOI: 10.1128/cdli.10.3.481-482.2003] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Complement fixation (CF) was compared to hemagglutination inhibition (HI) as a method for identifying antibody responses to influenza virus vaccination. CF assays were performed at two different laboratories using paired (pre- and postvaccination) sera from 38 vaccinated laboratory employees; HI assays were performed at a third laboratory. As expected, most vaccinees (31/38 = 82%) responded to at least one of three influenza virus antigens as measured by HI. In contrast, only 21% (8/38) of vaccinees showed a response by CF at laboratory 1, and only 29% (11/38) showed a response by CF at laboratory 2. These findings indicate that due to low sensitivity, CF assays should not be used to assess the antibody response to influenza virus vaccination.
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Prince HE, Leber AL. Validation of an in-house assay for cytomegalovirus immunoglobulin G (CMV IgG) avidity and relationship of avidity to CMV IgM levels. Clin Diagn Lab Immunol 2002; 9:824-7. [PMID: 12093680 PMCID: PMC120015 DOI: 10.1128/cdli.9.4.824-827.2002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Measurement of cytomegalovirus (CMV)-specific immunoglobulin G (IgG) avidity has proven to be a powerful tool for distinguishing primary from nonprimary CMV infection. An in-house enzyme-linked immunosorbent assay (ELISA) for measuring CMV IgG avidity was validated using 84 sera from pregnant women who had recently seroconverted following primary CMV infection and 74 sera from individuals with past CMV infection (IgG-positive and IgM-negative profile). Of the 84 sera from pregnant women, 73 sera were collected within 120 days of the last IgG-negative sample, and 72 of these 73 sera (99%) exhibited an avidity index (AI) of <50%. In contrast, 71 of 74 (96%) sera from individuals with past CMV infection exhibited CMV AI values of > 60%. Thus, low avidity in the in-house ELISA was defined as an AI of < or = 50%, whereas high avidity was defined as an AI of > or = 60%. In additional studies, the relationship between CMV IgG avidity and CMV IgM levels was examined using 64 CMV IgG-positive sera (time since seroconversion unknown) exhibiting equivocal or positive results in a CMV IgM capture ELISA (Diamedix). Of these 64 sera, 29 exhibited IgM index values of > or = 3.0, and 27 of these 29 (93%) exhibited low IgG avidity. A similar trend was observed when a subset of these 64 sera (n = 48) was tested in another CMV IgM capture ELISA (Trinity); of 18 sera with IgM index values of > or = 3.0, 17 (94%) exhibited low IgG avidity. These findings demonstrate the validity of an in-house ELISA for CMV IgG avidity and further show that strong reactivity of CMV IgG-positive sera in either of two CMV IgM capture assays is a reliable indicator of low CMV IgG avidity, and thus, recent CMV infection.
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Leber AL, Hindler JF, Kato EO, Bruckner DA, Pegues DA. Laboratory-based surveillance for vancomycin-resistant enterococci: utility of screening stool specimens submitted for Clostridium difficile toxin assay. Infect Control Hosp Epidemiol 2001; 22:160-4. [PMID: 11310695 DOI: 10.1086/501884] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To study vancomycin-resistant enterococci (VRE) gastrointestinal colonization prevalence in high-risk hospitalized patients and to assess the cost and utility of this laboratory-based surveillance. SETTING Large university teaching hospital. DESIGN Quarterly prevalence culture survey of 50 stool specimens submitted for Clostridium difficile toxin A assay from October 1996 through June 1999 (n=526). Screening culture survey of all C difficile-positive stool specimens from July 1998 through June 1999 (n=140). PATIENTS Specimens for analysis were collected from patients who were admitted to the hospital and who had C difficile toxin A testing ordered. Patient samples were excluded from analysis if they were obtained from patients not hospitalized at UCLA Medical Center, if the C difficile toxin assay result was indeterminate, or if the patient was known to have previous VRE colonization or infection. RESULTS During quarterly surveillance, VRE was detected in 19.8%, C difficile toxin A in 9.5%, and both VRE and C difficile toxin A in 3.2% of stool specimens submitted for C difficile toxin assay. Patients whose stool specimens were positive for C difficile toxin A were significantly more likely than those whose specimens were negative to have VRE detected (odds ratio, 2.3; 95% confidence interval, 1.2-4.5). Based on these findings, in July 1998, we began routine screening of all C difficile-positive stool specimens for VRE. From July 1998 through June 1999, 58 (41.4%) of 140 patients with C difficile-positive specimens had VRE newly detected in the stool. The combined cost of the two laboratory-based surveillance strategies was approximately $62 per VRE-positive patient identified and $5,800 per year. CONCLUSION Quarterly surveillance of stool submitted for C difficile assay combined with screening all C difficile-positive stools is a cost-effective and efficient strategy for detecting VRE stool colonization among high-risk hospitalized patients. Such a laboratory-based surveillance should be included as part of a comprehensive program to limit nosocomial VRE transmission.
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Affiliation(s)
- A L Leber
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles, USA
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Labarca JA, Leber AL, Kern VL, Territo MC, Brankovic LE, Bruckner DA, Pegues DA. Outbreak of Stenotrophomonas maltophilia bacteremia in allogenic bone marrow transplant patients: role of severe neutropenia and mucositis. Clin Infect Dis 2000; 30:195-7. [PMID: 10619754 DOI: 10.1086/313591] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
From March 1997 through November 1997, 8 allogenic bone marrow transplant (BMT) patients developed Stenotrophomonas maltophilia bacteremia on the hematology service at UCLA Medical Center (Los Angeles). Five of these patients had undergone transplantation during the same hospitalization that S. maltophilia bacteremia was detected (case patients). Compared with 7 concurrently hospitalized allogenic BMT patients (control patients), the 5 case patients were more likely to have been hospitalized in room A (P=.045), to have severe neutropenia on the culture date (P=.028), to have a longer duration of severe neutropenia (P=.05), to have severe mucositis (P=. 028), and to have received total parenteral nutrition (P=.028). Pulsed-field gel electrophoresis revealed that 2 of 3 isolates from case patients hospitalized in room A were identical. In allogenic BMT patients, severe neutropenia and severe mucositis may promote infection with S. maltophilia by impairing host defenses.
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Affiliation(s)
- J A Labarca
- UCLA School of Medicine, Los Angeles, CA 90095-1688, USA
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Leber AL. Intestinal amebae. Clin Lab Med 1999; 19:601-19, vii. [PMID: 10549428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Although the intestinal amebae that infect humans are not thought of as classic agents of food-borne disease, food plays an important role in the transmission of these protozoa. This is particularly true for areas of the world where the organisms are endemic. Transmission of most intestinal protozoa occurs by the fecal-oral route via contaminated food or water. Among the four genera of amebae that infect man, only Entamoeba histolytica and Blastocystis hominis are causes of disease. This article focuses on E. histolytica because of the organism's medical and economic impact on humans. In addition, the epidemiology, control, and laboratory diagnosis of these protozoa are addressed.
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Affiliation(s)
- A L Leber
- CompuNet Clinical Laboratories, Moraine, Ohio, USA
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Marshall SA, Jones RN, Wanger A, Washington JA, Doern GV, Leber AL, Haugen TH. Proposed MIC quality control guidelines for National Committee for Clinical Laboratory Standards susceptibility tests using seven veterinary antimicrobial agents: ceftiofur, enrofloxacin, florfenicol, penicillin G-novobiocin, pirlimycin, premafloxacin, and spectinomycin. J Clin Microbiol 1996; 34:2027-9. [PMID: 8818906 PMCID: PMC229178 DOI: 10.1128/jcm.34.8.2027-2029.1996] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The present multicenter study proposes broth microdilution quality control (QC) ranges for the antimicrobial agents ceftiofur, enrofloxacin, florfenicol, penicillin G-novobiocin, pirlimycin, premafloxacin, and spectinomycin, which are used in veterinary practice. Six separate laboratories tested replicates of National Committee for Clinical Laboratory Standards (NCCLS)-recommended QC organisms (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 29213, and Enterococcus faecalis ATCC 29212) on medium lots both common and unique to all laboratories. The proposed ranges were within 3 or 4 log2 dilution steps of the modal MICs for all organism-antimicrobial agent pairs, depending on their MIC distributions. With > or = 94.7% of all MIC results being within the proposed QC ranges, all combinations tested comply with NCCLS guidelines and all have been accepted by the NCCLS subcommittee developing susceptibility testing procedures for veterinary laboratories.
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Affiliation(s)
- S A Marshall
- Department of Pathology, University of Iowa College of Medicine, Iowa City 52242, USA
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