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Ficek M, Cieślik M, Janik M, Brodowski M, Sawczak M, Bogdanowicz R, Ryl J. Boron-doped diamond nanosheet volume-enriched screen-printed carbon electrodes: a platform for electroanalytical and impedimetric biosensor applications. Mikrochim Acta 2023; 190:410. [PMID: 37736868 PMCID: PMC10516795 DOI: 10.1007/s00604-023-05991-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 09/06/2023] [Indexed: 09/23/2023]
Abstract
This paper focuses on the development of a novel electrode based on boron-doped diamond nanosheet full-volume-enriched screen-printed carbon electrodes (BDDPE) for use as an impedimetric biosensor. Impedimetric biosensors offer high sensitivity and selectivity for virus detection, but their use as point-of-care devices is limited by the complexity of nanomaterials' architecture and the receptor immobilisation procedures. The study presents a two-step modification process involving the electroreduction of diazonium salt at the BDDPE and the immobilisation of antibodies using zero-length cross-linkers for a selective impedimetric biosensor of Haemophilus influenzae (Hi). The incorporation of diamond nanosheets into BDDPE leads to enhanced charge transfer and electrochemical behaviour, demonstrating greatly improved electrochemically active surface area compared with unmodified screen-printed electrodes (by 44% and 10% on average for [Ru(NH3)6]Cl2 and K3[Fe(CN)6], respectively). The presented sensing system shows high specificity towards protein D in Hi bacteria, as confirmed by negative controls against potential interference from other pathogens, with an estimated tolerance limit for interference under 12%. The Hi limit of detection by electrochemical impedance spectroscopy was 1 CFU/mL (measured at - 0.13 V vs BDDPE pseudo-reference), which was achieved in under 10 min, including 5 min sample incubation in the presence of the analyte.
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Affiliation(s)
- Mateusz Ficek
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Mateusz Cieślik
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
- Department of Analytical Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
| | - Monika Janik
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662, Warsaw, Poland
| | - Mateusz Brodowski
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Mirosław Sawczak
- Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14, Gdańsk, Poland
| | - Robert Bogdanowicz
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland.
| | - Jacek Ryl
- Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland.
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Regassa BT, Gebrewold LA, Mekuria WT, Kassa NA. Molecular epidemiology of respiratory syncytial virus in children with acute respiratory illnesses in Africa: A systematic review and meta-analysis. J Glob Health 2023; 13:04001. [PMID: 36637855 PMCID: PMC9840062 DOI: 10.7189/jogh.13.04001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background Globally, the respiratory syncytial virus (RSV) is the most common etiologic agent of acute respiratory illnesses in children. However, its burden has not been well addressed in developing countries. We aimed to estimate the molecular epidemiology of RSV in children less than 18 years of age with acute respiratory infections in Africa by conducting a systematic review and meta-analysis. Methods We systematically searched PubMed, Scopus, CINAHL, and Global Index Medicus databases to identify studies published from January 1, 2002, to April 27, 2022, following the PRISMA 2020 guideline. We assessed the study quality using the Joanna Brigg's Institute (JBI) critical appraisal checklists. We conducted a qualitative synthesis by describing the characteristics of included studies and performed the quantitative synthesis with random effects model using STATA-14. We checked for heterogeneity with Q statistics, quantified by I2, and determined the prediction interval. We performed subgroup analyses to explain the sources of heterogeneity and assessed publication biases by funnel plots augmented with Egger's test. Results Eighty-eight studies with 105 139 participants were included in the review. The overall pooled prevalence of RSV in children <18 years of age was 23% (95% confidence interval (CI) = 20, 25%). Considerable heterogeneity was present across the included studies. The adjusted prediction interval was found to be 19%-27%. Heterogeneities were explained by subgroups analyses. The highest prevalence of RSV was found among inpatients, 28% (95% CI = 25, 31%) compared with inpatients/outpatients and outpatients, with statistically significant differences (P < 0.01). The RSV estimate was also highest among those with acute lower respiratory tract illnesses (ALRTIs), 28% (95% CI = 25, 31%) compared with acute upper respiratory tract illnesses (AURTIs) and both acute upper/lower respiratory manifestations, with statistically different prevalence (P < 0.01). RSV infection estimates in each sub-region of Africa were statistically different (P < 0.01). There were no statistically significant differences in RSV infections by designs, specimen types, and specimen conditions, despite them contributing to heterogeneity. Conclusions We found a high prevalence of RSV in pediatric populations with acute respiratory tract illnesses in Africa, highlighting that the prevention and control of RSV infections in children deserve more attention. Registration PROSPERO CRD42022327054.
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Affiliation(s)
- Belay Tafa Regassa
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Ambo University, Ethiopia
| | - Lami Abebe Gebrewold
- Department of Public Health, College of Medicine and Health Sciences, Ambo University, Ethiopia
| | - Wagi Tosisa Mekuria
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Ambo University, Ethiopia
| | - Nega Assefa Kassa
- School of Public Health, College of Health and Medical Sciences, Haramaya University, Ethiopia
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Lei C, Lou CT, Io K, SiTou KI, Ip CP, U H, Pan B, Ung COL. Viral etiology among children hospitalized for acute respiratory tract infections and its association with meteorological factors and air pollutants: a time-series study (2014-2017) in Macao. BMC Infect Dis 2022; 22:588. [PMID: 35786346 PMCID: PMC9250746 DOI: 10.1186/s12879-022-07585-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 07/01/2022] [Indexed: 11/25/2022] Open
Abstract
Background The associations between viral etiology of acute respiratory infections (ARI) with meteorological factors and air pollutants among children is not fully understood. This study aimed to explore the viral etiology among children hospitalized for ARI and the association of meteorological factors and air pollutants with children hospitalization due to viral ARI. Methods Electronic health record data about children (aged between 1 month and 14 years) admitted for ARI at Kiang Wu Hospital in Macao between 2014 and 2017 was analyzed retrospectively. xMAP multiplex assays were used to detect viruses in the nasopharyngeal swab and distributed-lag nonlinear model (DLNM) was used to evaluate associations. Results Among the 4880 cases of children hospitalization due to ARI, 3767 (77.2%) were tested positive for at least one virus and 676 (18%) exhibited multiple infections. Enterovirus (EV)/rhinovirus (HRV), adenovirus (ADV), respiratory syncytial virus (RSV) and influenza virus (IFV) were the most common viral pathogens associated with ARI and human bocavirus (hBOV) exhibited the highest multiple infection rates. Meteorological factors and air pollutants (PM10, PM2.5 and NO2) were associated with the risk of viral ARI hospitalization. The relative risk of viral infection increased with daily mean temperature but plateaued when temperature exceeded 23 °C, and increased when the relative humidity was < 70% and peaked at 50%. The effect of solar radiation was insignificant. Air pollutants (including PM10, PM2.5, NO2 and O3) showed strong and immediate effect on the incidence of viral infection. Conclusions The effects of mean temperature, relative humidity and air pollutants should be taken into account when considering management of ARI among children. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07585-y.
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Affiliation(s)
- Cheng Lei
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - Cheong Tat Lou
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - King Io
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - Kin Ian SiTou
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - Chong Pak Ip
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - HongJin U
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - Baoquan Pan
- Department of Pediatrics, Kiang Wu Hospital, Macao, China
| | - Carolina Oi Lam Ung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Macao, China. .,Department of Public Health and Medicinal Administration, Faculty of Health Sciences, University of Macau, Macao, China.
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4
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Refay ASE, Shehata MA, Sherif LS, Nady HGE, Kholoussi N, Kholoussi S, Baroudy NRE, Gomma MR, Mahmoud SH, Shama NMA, Bagato O, Taweel AE, kandeil A, Ali MA. Prevalence of viral pathogens in a sample of hospitalized Egyptian children with acute lower respiratory tract infections: a two-year prospective study. BULLETIN OF THE NATIONAL RESEARCH CENTRE 2022; 46:103. [PMID: 35431533 PMCID: PMC9006499 DOI: 10.1186/s42269-022-00790-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 04/02/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Viral pneumonias are a major cause of childhood mortality. Proper management needs early and accurate diagnosis. This study objective is to investigate the viral etiologies of pneumonia in children. RESULTS This prospective study enrolled 158 and 101 patients in the first and second year, respectively, and their mean age was 4.72 ± 2.89. Nasopharyngeal swabs were collected and subjected to virus diagnosis by reverse transcription polymerase chain reaction (RT-PCR). Viral etiologies of pneumonia were evidenced in 59.5% of the samples in the first year, all of them were affirmative for influenza A, 2 samples were affirmative for Human coronavirus NL63, and one for Human coronavirus HKU1. In the second year, 87% of patients had a viral illness. The most prevalent agents are human metapneumovirus which was detected in 44 patients (43.6%) followed by human rhinovirus in 35 patients (34.7%) and then parainfluenza-3 viruses in 33 patients (32.7%), while 14 patients had a confirmed diagnosis for both Pan coronavirus and Flu-B virus. CONCLUSIONS Viral infection is prevalent in the childhood period; however, the real magnitude of viral pneumonia in children is underestimated. The reverse transcriptase polymerase chain reaction has to be a vital tool for epidemiological research and is able to clear the gaps in-between clinical pictures and final diagnoses.
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Affiliation(s)
- Amira S. El Refay
- Child Health Department, National Research Centre, 33 El-Bohouth Street (Former El Tahrir St.), PO Box 12622, Dokki, Giza, Egypt
| | - Manal A. Shehata
- Child Health Department, National Research Centre, 33 El-Bohouth Street (Former El Tahrir St.), PO Box 12622, Dokki, Giza, Egypt
| | - Lobna S. Sherif
- Child Health Department, National Research Centre, 33 El-Bohouth Street (Former El Tahrir St.), PO Box 12622, Dokki, Giza, Egypt
| | - Hala G. El Nady
- Child Health Department, National Research Centre, 33 El-Bohouth Street (Former El Tahrir St.), PO Box 12622, Dokki, Giza, Egypt
| | - Naglaa Kholoussi
- Immunogenetics Department, National Research Centre, Dokki, Egypt
| | - Shams Kholoussi
- Immunogenetics Department, National Research Centre, Dokki, Egypt
| | | | - Mokhtar R. Gomma
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Sara H. Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Noura M. Abo Shama
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Ola Bagato
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Ahmed El Taweel
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Ahmed kandeil
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
| | - Mohamed A. Ali
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Dokki, Giza, Egypt
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Lin HC, Liu YC, Hsing TY, Chen LL, Liu YC, Yen TY, Lu CY, Chang LY, Chen JM, Lee PI, Huang LM, Lai FP. RSV pneumonia with or without bacterial co-infection among healthy children. J Formos Med Assoc 2021; 121:687-693. [PMID: 34446339 DOI: 10.1016/j.jfma.2021.08.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/08/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Respiratory syncytial virus (RSV) is a common cause of childhood pneumonia, but there is limited understanding of whether bacterial co-infections affect clinical severity. METHODS We conducted a retrospective cohort study at National Taiwan University Hospital from 2010 to 2019 to compare clinical characteristics and outcomes between RSV with and without bacterial co-infection in children without underlying diseases, including length of hospital stay, intensive care unit (ICU) admission, ventilator use, and death. RESULTS Among 620 inpatients with RSV pneumonia, the median age was 1.33 months (interquartile range, 0.67-2 years); 239 (38.6%) under 1 year old; 366 (59.0%) males; 201 (32.4%) co-infected with bacteria. The three most common bacteria are Streptococcus pneumoniae, Staphylococcus aureus and Haemophilus influenzae. The annually seasonal analysis showed that spring and autumn were peak seasons, and September was the peak month. Compared with single RSV infection, children with bacterial co-infection were younger (p = 0.021), had longer hospital stay (p < 0.001), needed more ICU care (p = 0.02), had higher levels of C-reactive protein (p = 0.009) and more frequent hyponatremia (p = 0.013). Overall, younger age, bacterial co-infection (especially S. aureus), thrombocytosis, and lower hemoglobin level were associated with the risk of requiring ICU care. CONCLUSION RSV related bacterial co-infections were not uncommon and assoicated with ICU admission, especially for young children, and more attention should be given. For empirical antibacterial treatment, high-dose amoxicillin-clavulanic acid or ampicillin-sulbactam was recommended for non-severe cases; vancomycin and third-generation cephalosporins were suggested for critically ill patients requiring ICU care.
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Affiliation(s)
- Hsiao-Chi Lin
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yun-Chung Liu
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | - Tzu-Yun Hsing
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Li-Lun Chen
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yu-Cheng Liu
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ting-Yu Yen
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Chun-Yi Lu
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Luan-Yin Chang
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Jong-Min Chen
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ping-Ing Lee
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Li-Min Huang
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Fei-Pei Lai
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan; Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan; Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
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Mirzaei R, Goodarzi P, Asadi M, Soltani A, Aljanabi HAA, Jeda AS, Dashtbin S, Jalalifar S, Mohammadzadeh R, Teimoori A, Tari K, Salari M, Ghiasvand S, Kazemi S, Yousefimashouf R, Keyvani H, Karampoor S. Bacterial co-infections with SARS-CoV-2. IUBMB Life 2020; 72:2097-2111. [PMID: 32770825 PMCID: PMC7436231 DOI: 10.1002/iub.2356] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/11/2020] [Accepted: 07/12/2020] [Indexed: 12/13/2022]
Abstract
The pandemic coronavirus disease 2019 (COVID‐19), caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS‐CoV‐2), has affected millions of people worldwide. To date, there are no proven effective therapies for this virus. Efforts made to develop antiviral strategies for the treatment of COVID‐19 are underway. Respiratory viral infections, such as influenza, predispose patients to co‐infections and these lead to increased disease severity and mortality. Numerous types of antibiotics such as azithromycin have been employed for the prevention and treatment of bacterial co‐infection and secondary bacterial infections in patients with a viral respiratory infection (e.g., SARS‐CoV‐2). Although antibiotics do not directly affect SARS‐CoV‐2, viral respiratory infections often result in bacterial pneumonia. It is possible that some patients die from bacterial co‐infection rather than virus itself. To date, a considerable number of bacterial strains have been resistant to various antibiotics such as azithromycin, and the overuse could render those or other antibiotics even less effective. Therefore, bacterial co‐infection and secondary bacterial infection are considered critical risk factors for the severity and mortality rates of COVID‐19. Also, the antibiotic‐resistant as a result of overusing must be considered. In this review, we will summarize the bacterial co‐infection and secondary bacterial infection in some featured respiratory viral infections, especially COVID‐19.
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Affiliation(s)
- Rasoul Mirzaei
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Pedram Goodarzi
- Faculty of Pharmacy, Iran University of Medical Sciences, Tehran, Iran
| | - Muhammad Asadi
- Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ayda Soltani
- School of Basic Sciences, Ale-Taha Institute of Higher Education, Tehran, Iran
| | - Hussain Ali Abraham Aljanabi
- Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.,Alnahrain University College of Medicine, Iraq
| | - Ali Salimi Jeda
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Shirin Dashtbin
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Saba Jalalifar
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Rokhsareh Mohammadzadeh
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Teimoori
- Department of Virology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Kamran Tari
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mehdi Salari
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sima Ghiasvand
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sima Kazemi
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Rasoul Yousefimashouf
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hossein Keyvani
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sajad Karampoor
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Govindarajan S, Bivan S. Viral and bacterial coinfection of the respiratory tract in a 10-month-old child. BMJ Case Rep 2020; 13:13/7/e235295. [DOI: 10.1136/bcr-2020-235295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
A 10-month-old child, immunised appropriately for age, presented with a history of cough, vomiting, diarrhoea, increased work of breathing and eye redness for 1 week. She was treated for suspected bronchiolitis with supportive oxygen and hypertonic saline nebulisation. In view of continuing fever spikes and persistent oxygen requirement, she was evaluated further. Her inflammatory markers were raised, blood film showed neutrophils left shift with toxic granulations and chest X-ray was suggestive of the right upper lobe segmental atelectasis suggestive of a bacterial infection. Her nasopharyngeal aspirate for multiplex tandem PCR was positive for adenovirus, respiratory syncytial virus and Bordetella species. She was treated with oral clarithromycin for 5 days which improved her symptoms. She was discharged with further follow-up. Coinfection with bacteria or atypical bacteria in children with acute respiratory tract infection is common and this coinfection can induce serious illness.
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Naga IS, Elsawaf GE, Elzalabany M, Eltalkhawy MY, Kader O. Human coronavirus OC43 and other respiratory viruses from acute respiratory infections of Egyptian children. Acta Microbiol Immunol Hung 2020; 67:112-119. [PMID: 32160782 DOI: 10.1556/030.2020.01059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 12/02/2019] [Indexed: 11/19/2022]
Abstract
Respiratory infections have a significant impact on health worldwide. Viruses are major causes of acute respiratory infections among children. Limited information regarding its prevalence in Egypt is available. This study investigated prevalence of 10 respiratory viruses; Adenovirus, influenza A, B, respiratory syncytial virus (RSV), Parainfluenza virus (PIV)type 1-4, enterovirus, and human coronavirus OC43 (HCoV-OC43) among children in Alexandria, Egypt presenting with acute lower respiratory tract infections.The study was conducted on children <14 years of age selected from ElShatby Pediatric Hospital, Alexandria University, Egypt. One hundred children presenting during winter season with influenza-like illness were eligible for the study. Oropharyngeal swabs were collected and subjected to viral RNA and DNA extraction followed by polymerase chain reaction.Viral infections were detected in 44% of cases. Adenovirus was the most common, it was found in 19% of the patients. Prevalence of PIV (3 and 4) and enterovirus was 7% each. Prevalence of RSV and HCoV-OC43 was 5% and 3% respectively. Two percentage were Influenza A positive and 1% positive for influenza B. Mixed viral infection was observed in 7%.To the best of our knowledge, this is the first report of the isolation of HCoV-OC43 from respiratory infections in Alexandria, Egypt.
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Affiliation(s)
- Iman S. Naga
- 1Department of Microbiology, Medical Research Institute, University of Alexandria, Alexandria, Egypt
| | - Gamal Eldin Elsawaf
- 1Department of Microbiology, Medical Research Institute, University of Alexandria, Alexandria, Egypt
| | - Mahmoud Elzalabany
- 2Department of Pediatrics, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
| | | | - Ola Kader
- 1Department of Microbiology, Medical Research Institute, University of Alexandria, Alexandria, Egypt
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Comparative Clinical Evaluation of NeoPlex RB-8 with Seeplex PneumoBacter ACE for Simultaneous Detection of Eight Respiratory Bacterial Pathogens. J Clin Microbiol 2020; 58:JCM.01500-19. [PMID: 31748320 DOI: 10.1128/jcm.01500-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 11/06/2019] [Indexed: 11/20/2022] Open
Abstract
There are several convenient and accurate molecular assays to detect respiratory bacterial infection. The NeoPlex RB-8 detection kit (NeoPlex RB-8) is a new multiplex real-time PCR assay that simultaneously detects Streptococcus pneumoniae, Mycoplasma pneumoniae, Chlamydophila pneumoniae, Legionella pneumophila, Haemophilus influenzae, Bordetella pertussis, Bordetella parapertussis, and Moraxella catarrhalis in a single test. This study compared the clinical concordance of NeoPlex RB-8 with another method, Seeplex PneumoBacter ACE detection assay (Seeplex PB ACE), which simultaneously detects S. pneumoniae, M. pneumoniae, C. pneumoniae, L. pneumophila, H. influenzae, and B. pertussis We tested 2,137 nasopharyngeal swab and sputum specimens using both assays. For discordant Bordetella parapertussis and M. catarrhalis specimens, we also performed bidirectional sequencing. For S. pneumoniae, M. pneumoniae, C. pneumoniae, L. pneumophila, H. influenzae, and B. pertussis, which are detected by both NeoPlex RB-8 and Seeplex PB ACE, the positive and negative agreement between the two assays ranged from 91.7 to 100% (κ = 0.918 to 1). S. pneumoniae and H. influenzae were the most discordant targets and measured with higher sensitivity and specificity by NeoPlex RB-8 than Seeplex PB ACE. For Bordetella parapertussis and M. catarrhalis, which are not detected by Seeplex PB ACE, NeoPlex RB-8 sensitivity and specificity were >99%. Overall, NeoPlex RB-8 was highly comparable to Seeplex PB ACE, but NeoPlex RB-8 was more clinically accurate, with higher throughput and more convenience.
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