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Zhou Z, Zhang P, Cui Y, Zhang Y, Qin X, Li R, Liu P, Dou Y, Wang L, Zhao Y. Experiments Investigating the Competitive Growth Advantage of Two Different Genotypes of Human Metapneumovirus: Implications for the Alternation of Genotype Prevalence. Sci Rep 2020; 10:2852. [PMID: 32071381 PMCID: PMC7029021 DOI: 10.1038/s41598-020-59150-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 01/23/2020] [Indexed: 12/03/2022] Open
Abstract
Human metapneumovirus (hMPV) is an important pathogen that causes upper and lower respiratory tract infections in children worldwide. hMPV has two major genotypes, hMPV-A and hMPV-B. Epidemiological studies have shown that the two hMPV genotypes alternate in predominance worldwide in recent years. Co-circulation of the two genotypes of hMPV was usually observed and there is no study about the interaction between them, such as competitive replication, which maybe the possible mechanisms for alternating prevalence of subtypes. Our present study have used two different genotypes of hMPV (genotype A: NL/1/00; B: NL/1/99) in different proportions in animal model (BALB/c mice) and cell model (Vero-E6) separately. The result showed that the competitive growth does exist in BALB/c mice, genotype B had a strong competitive advantage. However, genotype B did not cause more severe disease than non-predominant (genotype A) or mixed strains in the study, which were evaluated by the body weight, airway hyperresponsiveness and lung pathology of mouse. In cell model, competitive growth and the two genotypes alternately prevalence were observed. In summary, we confirmed that there was a competitive replication between hMPV genotype A and B, and no difference in disease severity caused by the two subtypes. This study shows a new insight to understand the alternation of hMPV genotype prevalence through genotype competition and provide experimental evidence for disease control and vaccine design.
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Affiliation(s)
- Zhen Zhou
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Pan Zhang
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Yuxia Cui
- Department of Pediatrics, Guizhou Provincial People's Hospital, Guizhou, 550002, China
| | - Yongbo Zhang
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Xian Qin
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Rongpei Li
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Ping Liu
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Ying Dou
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Lijia Wang
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China.,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China
| | - Yao Zhao
- Department of Pediatric Research Institute; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R. China. .,Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, 400014, China.
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Oong XY, Chook JB, Ng KT, Chow WZ, Chan KG, Hanafi NS, Pang YK, Chan YF, Kamarulzaman A, Tee KK. The role of human Metapneumovirus genetic diversity and nasopharyngeal viral load on symptom severity in adults. Virol J 2018; 15:91. [PMID: 29792212 PMCID: PMC5966857 DOI: 10.1186/s12985-018-1005-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 05/16/2018] [Indexed: 11/21/2022] Open
Abstract
Background Human metapneumovirus (HMPV) is established as one of the causative agents of respiratory tract infections. To date, there are limited reports that describe the effect of HMPV genotypes and/or viral load on disease pathogenesis in adults. This study aims to determine the role of HMPV genetic diversity and nasopharyngeal viral load on symptom severity in outpatient adults with acute respiratory tract infections. Methods Severity of common cold symptoms of patients from a teaching hospital was assessed by a four-category scale and summed to obtain the total symptom severity score (TSSS). Association between the fusion and glycoprotein genes diversity, viral load (quantified using an improved RT-qPCR assay), and symptom severity were analyzed using bivariate and linear regression analyses. Results Among 81/3706 HMPV-positive patients, there were no significant differences in terms of demographics, number of days elapsed between symptom onset and clinic visit, respiratory symptoms manifestation and severity between different HMPV genotypes/sub-lineages. Surprisingly, elderly patients (≥65 years old) had lower severity of symptoms (indicated by TSSS) than young and middle age adults (p = 0.008). Nasopharyngeal viral load did not correlate with nor predict symptom severity of HMPV infection. Interestingly, at 3–5 days after symptom onset, genotype A-infected patients had higher viral load compared to genotype B (4.4 vs. 3.3 log10 RNA copies/μl) (p = 0.003). Conclusions Overall, HMPV genetic diversity and viral load did not impact symptom severity in adults with acute respiratory tract infections. Differences in viral load dynamics over time between genotypes may have important implications on viral transmission. Electronic supplementary material The online version of this article (10.1186/s12985-018-1005-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiang Yong Oong
- Department of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Jack Bee Chook
- School of Healthcare and Medical Sciences, Sunway University, 47500, Kuala Lumpur, Selangor, Malaysia
| | - Kim Tien Ng
- Department of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Wei Zhen Chow
- Department of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kok Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Nik Sherina Hanafi
- Department of Primary Care Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Yong Kek Pang
- Department of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Yoke Fun Chan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Adeeba Kamarulzaman
- Department of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kok Keng Tee
- School of Healthcare and Medical Sciences, Sunway University, 47500, Kuala Lumpur, Selangor, Malaysia. .,Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Gregianini TS, Seadi CF, Menegolla I, Martins LG, Ikuta N, Wolf JM, Lunge VR. Human metapneumovirus in Southern Brazil. Rev Soc Bras Med Trop 2018. [DOI: 10.1590/0037-8682-0435-2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Durigon EL, Botosso VF, de Oliveira DBL. Human Respiratory Syncytial Virus: Biology, Epidemiology, and Control. HUMAN VIROLOGY IN LATIN AMERICA 2017. [PMCID: PMC7121549 DOI: 10.1007/978-3-319-54567-7_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wolf JM, Gregianini TS, Seadi CMF, Tumioto GL, Dambrós BP, Lehmann FKM, Carli SD, Ikuta N, Lunge VR. Performance of direct immunofluorescence assay for the detection of human metapneumovirus under clinical laboratory settings. Rev Soc Bras Med Trop 2016; 48:762-4. [PMID: 26676503 DOI: 10.1590/0037-8682-0107-2015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 06/09/2015] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Human metapneumovirus (hMPV) is an emergent human respiratory pathogen. This study aimed to evaluate the performance of direct immunofluorescence (DIF) to detect hMPV in a clinical laboratory setting. METHODS Nasopharyngeal aspirate samples (448) of children and adults with respiratory illness were used to detect hMPV by using DIF and real time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) assays. RESULTS In all, 36 (8%) samples were positive by DIF and 94 (21%) were positive by qRT-PCR. Direct immunofluorescence specificity was 99% and sensitivity was 38%. CONCLUSIONS DIF is not very sensitive under clinical laboratory settings.
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Affiliation(s)
- Jonas Michel Wolf
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Tatiana Schäffer Gregianini
- Instituto de Pesquisas Biológicas, Laboratório Central de Saúde Pública do Estado do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Claudete Maria Farina Seadi
- Instituto de Pesquisas Biológicas, Laboratório Central de Saúde Pública do Estado do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Gabriela Luchiari Tumioto
- Instituto de Pesquisas Biológicas, Laboratório Central de Saúde Pública do Estado do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Bibiana Paula Dambrós
- Instituto de Pesquisas Biológicas, Laboratório Central de Saúde Pública do Estado do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | | | - Silvia De Carli
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Nilo Ikuta
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
| | - Vagner Ricardo Lunge
- Laboratório de Diagnóstico Molecular, Universidade Luterana do Brasil, Canoas, Rio Grande do Sul, Brazil
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Giamberardin HIG, Homsani S, Bricks LF, Pacheco APO, Guedes M, Debur MC, Raboni SM. Clinical and epidemiological features of respiratory virus infections in preschool children over two consecutive influenza seasons in southern Brazil. J Med Virol 2016; 88:1325-33. [PMID: 26773605 PMCID: PMC7167150 DOI: 10.1002/jmv.24477] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2016] [Indexed: 12/22/2022]
Abstract
This study reports the results of a systematic screening for respiratory viruses in pediatric outpatients from an emergency department (ED) in southern Brazil during two consecutive influenza seasons. Children eligible for enrollment in this study were aged 24–59 months and presented with acute respiratory symptoms and fever. Naso‐ and oropharyngeal swabs were collected and multiplex reverse transcription PCR (RT‐PCR) was performed to identify the respiratory viruses involved. In total, 492 children were included in this study: 248 in 2010 and 244 in 2011. In 2010, 136 samples (55%) were found to be positive for at least one virus and the most frequently detected viruses were human rhinovirus (HRV) (18%), adenovirus (AdV) (13%), and human coronavirus (CoV) (5%). In 2011, 158 samples (65%) were found to be positive for at least one virus, and the most frequently detected were HRV (29%), AdV (12%), and enterovirus (9%). Further, the presence of asthma (OR, 3.17; 95% CI, 1.86–5.46) was independently associated with HRV infection, whereas fever was associated with AdV (OR, 3.86; 95% CI, 1.31–16.52) and influenza infections (OR, 3.74; 95% CI, 1.26–16.06). Ten patients (2%) were diagnosed with pneumonia, and six of these tested positive for viral infection (4 HRV, 1 RSV, and 1 AdV). Thus, this study identified the most common respiratory viruses found in preschool children in the study region and demonstrated their high frequency, highlighting the need for improved data collection, and case management in order to stimulate preventive measures against these infections. J. Med. Virol. 88:1325–1333, 2016. © 2016 Wiley Periodicals, Inc.
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Haas LEM, Thijsen SFT, van Elden L, Heemstra KA. Human metapneumovirus in adults. Viruses 2013; 5:87-110. [PMID: 23299785 PMCID: PMC3564111 DOI: 10.3390/v5010087] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 12/17/2012] [Accepted: 12/19/2012] [Indexed: 11/16/2022] Open
Abstract
Human metapneumovirus (HMPV) is a relative newly described virus. It was first isolated in 2001 and currently appears to be one of the most significant and common human viral infections. Retrospective serologic studies demonstrated the presence of HMPV antibodies in humans more than 50 years earlier. Although the virus was primarily known as causative agent of respiratory tract infections in children, HMPV is an important cause of respiratory infections in adults as well. Almost all children are infected by HMPV below the age of five; the repeated infections throughout life indicate transient immunity. HMPV infections usually are mild and self-limiting, but in the frail elderly and the immunocompromised patients, the clinical course can be complicated. Since culturing the virus is relatively difficult, diagnosis is mostly based on a nucleic acid amplification test, such as reverse transcriptase polymerase chain reaction. To date, no vaccine is available and treatment is supportive. However, ongoing research shows encouraging results. The aim of this paper is to review the current literature concerning HMPV infections in adults, and discuss recent development in treatment and vaccination.
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Affiliation(s)
- Lenneke E. M. Haas
- Department of Intensive Care Medicine, Diakonessenhuis, Utrecht, 3582 KE, The Netherlands
| | - Steven F. T. Thijsen
- Department of Microbiology, Diakonessenhuis, Utrecht, 3582 KE, The Netherlands; E-Mails: (S.F.T.T.); (K.A.H.)
| | - Leontine van Elden
- Department of Pulmonary Diseases, Diakonessenhuis, Utrecht, 3582 KE, The Netherlands; E-Mail:
| | - Karen A. Heemstra
- Department of Microbiology, Diakonessenhuis, Utrecht, 3582 KE, The Netherlands; E-Mails: (S.F.T.T.); (K.A.H.)
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Human metapneumovirus infections are associated with severe morbidity in hospitalized children of all ages. Epidemiol Infect 2013; 141:2213-23. [PMID: 23290557 DOI: 10.1017/s0950268812002920] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The impact of human metapneumovirus (HMPV) in children aged >5 years and the risk factors associated with disease severity for all ages have not been well characterized. A retrospective cohort study of 238 children aged 0–15 years hospitalized over a 3-year period was performed. Medical records were reviewed for demographic information, clinical parameters and outcomes. Multivariable analyses were performed to identify independent factors associated with worse disease severity assessed by length of hospital stay (LOS), need for ICU care, respiratory support, and a disease severity score. Pulmonary diseases were associated with all outcomes of care, while congenital heart disease (CHD) and neuromuscular disorders were associated with longer LOS, and CHD and trisomy 21 were associated with worse severity scores independent of other covariables. Fever, retractions, use of steroids and albuterol were also associated with enhanced disease severity. Understanding the determinants of HMPV disease in children may help design targeted preventive strategies.
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Albuquerque MCM, Varella RB, Santos N. Acute respiratory viral infections in children in Rio de Janeiro and Teresópolis, Brazil. Rev Inst Med Trop Sao Paulo 2012; 54:249-55. [PMID: 22983287 DOI: 10.1590/s0036-46652012000500003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 05/31/2012] [Indexed: 11/22/2022] Open
Abstract
The frequency of viral pathogens causing respiratory infections in children in the cities of Rio de Janeiro and Teresópolis was investigated. Nasal swabs from children with acute respiratory illnesses were collected between March 2006 and October 2007. Specimens were tested for viral detection by conventional (RT)-PCR and/or real time PCR. Of the 205 nasal swabs tested, 64 (31.2%) were positive for at least one of the viral pathogens. Single infections were detected in 56 samples, 50 of those were caused by RNA viruses: 33 samples tested positive for rhinovirus, five for influenza A, five for metapneumovirus, four for coronavirus and, three for respiratory syncytial virus. For the DNA viruses, five samples were positive for bocavirus and one for adenovirus. Co-infections with these viruses were detected in eight samples. Our data demonstrate a high frequency of viral respiratory infections, emphasizing the need for a more accurate diagnosis particularly for the emerging respiratory viruses. The fact that the emerging respiratory viruses were present in 9.2% of the tested samples suggests that these viruses could be important respiratory pathogens in the country.
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Affiliation(s)
- Maria Carolina M Albuquerque
- Departament of Virology, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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Evaluation of the specificity and sensitivity of a potential rapid influenza screening system. Diagn Microbiol Infect Dis 2012; 75:77-80. [PMID: 23083638 PMCID: PMC7132696 DOI: 10.1016/j.diagmicrobio.2012.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 09/12/2012] [Accepted: 09/12/2012] [Indexed: 12/25/2022]
Abstract
Influenza remains a serious worldwide health threat with numerous deaths attributed to influenza-related complications. It is likely that transmission of influenza and both the morbidity and mortality of influenza could be reduced if inexpensive but reliable influenza screening assays were more available to the general public or local medical treatment facilities. This report provides the initial evaluation of a pilot system designed by Lucigen Corp. (Middleton, WI, USA) as a potential rapid near point-of-care screening system for influenza A and influenza B. The evaluation of specificity and sensitivity was conducted on stored nasal swab samples collected from emergency department patients presenting with influenza-like symptoms at a large military academic hospital and on de-identified nasal swabs and isolated RNA from a local epidemiology laboratory. The gold standard for assessment of specificity and sensitivity was the Luminex® Respiratory Viral Panel.
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Chen YS, Liu PY, Huang YF, Chen CS, Chiu LH, Huang NY, Hsieh KS, Chen YS. Comparison of diagnostic tools with multiplex polymerase chain reaction for pediatric lower respiratory tract infection: a single center study. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2012; 46:413-8. [PMID: 23031535 DOI: 10.1016/j.jmii.2012.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 07/02/2012] [Accepted: 07/26/2012] [Indexed: 11/18/2022]
Abstract
BACKGROUND/PURPOSE Acute respiratory tract infections are a leading cause of morbidity and mortality in children worldwide. Most have a viral etiology, with pneumococcus as an important pathogen. This single-center study compared the use of conventional diagnostic tools and two multiplex polymerase chain reaction (PCR) examinations for determining pathogens in lower respiratory tract infections (LRTIs) among children aged <5 years. METHODS From July to October 2010, 45 patients aged 2 months to 60 months and diagnosed as having LRTIs were enrolled. Their nasopharyngeal aspirates were evaluated through viral culture and two multiplex PCR examinations. The patients' clinical course, symptoms, signs, and laboratory findings were recorded and analyzed. RESULTS Among the 45 patients, 38 (84.4%) had detectable pathogens. Conventional viral and blood cultures had 35.6% positive rate, which increased to 51.1% when the quick antigen tests (Influenza A+B test and respiratory syncytial virus) and urine pneumococcal antigen test were combined. The positive rate further increased to 84.4% when the two multiplex PCR methods were combined. Twelve patients had co-infection, including 10 detected by the multiplex PCR methods. The co-infection rate was 26.7% (12/45). CONCLUSION Most LRTIs in children have a viral etiology. Multiplex PCR tests are rapid assays that can increase the diagnostic yield rate and detect slow-growing viruses and can detect more pathogens than conventional viral culture to enable, thereby helping clinicians to provide appropriate and timely treatment.
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Affiliation(s)
- Yu-Shen Chen
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Po-Yen Liu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Yung-Feng Huang
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Taiwan, ROC.
| | - Chiao-Shan Chen
- Section of Clinical Microbiology, Department of Pathology and Laboratory Medicine, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Ling-Hui Chiu
- Section of Clinical Microbiology, Department of Pathology and Laboratory Medicine, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Nuan-Ya Huang
- Section of Clinical Microbiology, Department of Pathology and Laboratory Medicine, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Kai-Sheng Hsieh
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Taiwan, ROC
| | - Yao-Shen Chen
- Section of Infectious Diseases, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Taiwan, ROC
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Al-Turab M, Chehadeh W, Al-Mulla F, Al-Nakib W. Evaluation of the PrimerDesign™ genesig real-time reverse transcription-polymerase chain reaction assay and the INFINITI® Respiratory Viral Panel Plus assay for the detection of human metapneumovirus in Kuwait. Diagn Microbiol Infect Dis 2012; 72:358-62. [PMID: 22300956 PMCID: PMC7132740 DOI: 10.1016/j.diagmicrobio.2012.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 12/13/2011] [Accepted: 01/01/2012] [Indexed: 11/29/2022]
Abstract
Human metapneumovirus (hMPV) is a respiratory pathogen that was discovered in 2001 and is considered a major cause of both upper and lower respiratory tract infections. A sensitive, fast, and high-throughput diagnostic test is needed for the detection of hMPV that may assist in the clinical management as well as in the reduction of inappropriate therapy. Therefore, a comparison assessment was performed in this study between the PrimerDesign™ genesig real-time reverse transcription–polymerase chain reaction (RT-PCR) Assay and the INFINITI® Respiratory Viral Panel Plus Assay (RVP-Plus) for the detection of hMPV infection in patients with respiratory tract infections. A total of 200 respiratory samples were collected from 185 hospitalized patients, during the winter season in Kuwait. Of 185 patients, 10 (5.4%) were positive for hMPV RNA by the in-house RT-PCR assay, while 7 (4%) were positive for hMPV RNA by the real-time RT-PCR assay and 9 (5%) were positive for hMPV RNA by the INFINITI® RVP-Plus assay. The high incidence rate (60%) of hMPV infection was in January 2011. The sensitivity of the real-time RT-PCR and INFINITI® RVP-Plus assays was 70% and 90%, respectively, with specificity of 100% for both assays. hMPV types A and B could be identified in this study; however, discordant genotyping results were found between the direct sequencing method and the INFINITI® RVP-Plus assay in 33% of hMPV-positive patients.
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Affiliation(s)
- Mariam Al-Turab
- Department of Microbiology, Faculty of Medicine, Kuwait University, Jabriya, Kuwait.
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Li J, Wang Z, Gonzalez R, Xiao Y, Zhou H, Zhang J, Paranhos-Baccala G, Vernet G, Jin Q, Wang J, Hung T. Prevalence of human metapneumovirus in adults with acute respiratory tract infection in Beijing, China. J Infect 2011; 64:96-103. [PMID: 22085814 PMCID: PMC7112659 DOI: 10.1016/j.jinf.2011.10.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 10/22/2011] [Accepted: 10/31/2011] [Indexed: 11/29/2022]
Abstract
Objective To evaluate the prevalence and clinical manifestations of human metapneumovirus (hMPV) in immunocompetent Chinese adults with acute respiratory tract infections (ARTIs). Methods A reverse transcription PCR (RT-PCR) assay targeting the P gene was developed in this study and used to detect hMPV in nasal and throat swabs collected from 2936 immunocompetent adult patients with ARTIs in Beijing, China between July 2008 and June 2010. Results Among the 2936 patients studied, 49 (1.7%) were positive for hMPV, of whom 14 (28.6%) were positive for hMPV_A2b, 19 (38.8%) for hMPV_B1, and 16 (32.6%) for hMPV_B2. hMPV_A1 was not detected. An average detection rate of 6.6% was observed in the peak months of the two epidemic seasons studied. The hMPV prevalence was higher in the sampled elderly (>65 years, 3.2%) than in middle aged adults (25–65 years; 2.0%) and teenagers (14–25 years; 0.9%). During the study period, hMPV infections showed a biennial rhythm of seasonality, peaking from November to March in 2008/09 and from March to June in 2010. Conclusion hMPV infection plays an important role in immunocompetent adults in its epidemic season. The demographic and clinical data presented in this study improves our understanding of the pathogenesis and clinical burden of hMPV infection in adults.
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Affiliation(s)
- Jianguo Li
- State Key Laboratory of Molecular Virology and Genetic Engineering, Institute of Pathogen Biology (IPB), Peking Union Medical College (PUMC) & Chinese Academy of Medical Sciences (CAMS), 9# Dong Dan San Tiao, Dongcheng District, Beijing 100730, PR China
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Mendes G, Soares AR, Sigiliano L, Machado F, Kaiser C, Romeiro N, Gestinari L, Santos N, Romanos MTV. In vitro anti-HMPV activity of meroditerpenoids from marine alga Stypopodium zonale (Dictyotales). Molecules 2011; 16:8437-50. [PMID: 21986522 PMCID: PMC6264370 DOI: 10.3390/molecules16108437] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/09/2011] [Accepted: 09/29/2011] [Indexed: 11/30/2022] Open
Abstract
In this paper, we evaluated the antiviral activity against HMPV replication of crude extract of the marine algae Stypopodium zonale and of two meroditerpenoids obtained from it, atomaric acid and epitaondiol, and a methyl ester derivative of atomaric acid. Their selectivity indexes were 20.78, >56.81, 49.26 and 12.82, respectively. Compared to ribavirin, the substances showed a relatively low cytotoxicity on LLC-MK2 cells, with a significant antiviral activity, inhibiting at least 90% of viral replication in vitro, which demonstrates the potential of these marine natural products to combat infections caused by HMPV in vitro.
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Affiliation(s)
- Gabriella Mendes
- Laboratório Experimental de Drogas Antivirais e Citotóxicas (LEDAC), Departamento de Virologia do, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
- Laboratório de Viroses Respiratórias, Entéricas e Oculares, Departamento de Virologia do Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Angélica Ribeiro Soares
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé (NUPEM), Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Lorena Sigiliano
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé (NUPEM), Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Fernanda Machado
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé (NUPEM), Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Carlos Kaiser
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Nelilma Romeiro
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé (NUPEM), Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Lísia Gestinari
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo em Ecologia e Desenvolvimento Socioambiental de Macaé (NUPEM), Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Norma Santos
- Laboratório de Viroses Respiratórias, Entéricas e Oculares, Departamento de Virologia do Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
| | - Maria Teresa Villela Romanos
- Laboratório Experimental de Drogas Antivirais e Citotóxicas (LEDAC), Departamento de Virologia do, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), CCS, Bloco I, Caixa Postal 68040, 21941-590 Rio de Janeiro, RJ, Brasil
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