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Rafferty AC, Bofkin K, Hughes W, Souter S, Hosegood I, Hall RN, Furuya-Kanamori L, Liu B, Drane M, Regan T, Halder M, Kelaher C, Kirk MD. Does 2x2 airplane passenger contact tracing for infectious respiratory pathogens work? A systematic review of the evidence. PLoS One 2023; 18:e0264294. [PMID: 36730309 PMCID: PMC9894495 DOI: 10.1371/journal.pone.0264294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 01/18/2023] [Indexed: 02/03/2023] Open
Abstract
We critically appraised the literature regarding in-flight transmission of a range of respiratory infections to provide an evidence base for public health policies for contact tracing passengers, given the limited pathogen-specific data for SARS-CoV-2 currently available. Using PubMed, Web of Science, and other databases including preprints, we systematically reviewed evidence of in-flight transmission of infectious respiratory illnesses. A meta-analysis was conducted where total numbers of persons on board a specific flight was known, to calculate a pooled Attack Rate (AR) for a range of pathogens. The quality of the evidence provided was assessed using a bias assessment tool developed for in-flight transmission investigations of influenza which was modelled on the PRISMA statement and the Newcastle-Ottawa scale. We identified 103 publications detailing 165 flight investigations. Overall, 43.7% (72/165) of investigations provided evidence for in-flight transmission. H1N1 influenza A virus had the highest reported pooled attack rate per 100 persons (AR = 1.17), followed by SARS-CoV-2 (AR = 0.54) and SARS-CoV (AR = 0.32), Mycobacterium tuberculosis (TB, AR = 0.25), and measles virus (AR = 0.09). There was high heterogeneity in estimates between studies, except for TB. Of the 72 investigations that provided evidence for in-flight transmission, 27 investigations were assessed as having a high level of evidence, 23 as medium, and 22 as low. One third of the investigations that reported on proximity of cases showed transmission occurring beyond the 2x2 seating area. We suggest that for emerging pathogens, in the absence of pathogen-specific evidence, the 2x2 system should not be used for contact tracing. Instead, alternate contact tracing protocols and close contact definitions for enclosed areas, such as the same cabin on an aircraft or other forms of transport, should be considered as part of a whole of journey approach.
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Affiliation(s)
- Anna C. Rafferty
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, Australian Capital Territory, Australia
- National Incident Centre, The Australian Government Department of Health, Canberra, Australian Capital Territory, Australia
| | - Kelly Bofkin
- Qantas Airways Limited, Mascot, New South Wales, Australia
- Virgin Australia Airlines, South Brisbane, Queensland, Australia
| | - Whitney Hughes
- Qantas Airways Limited, Mascot, New South Wales, Australia
| | - Sara Souter
- Qantas Airways Limited, Mascot, New South Wales, Australia
- Virgin Australia Airlines, South Brisbane, Queensland, Australia
| | - Ian Hosegood
- Qantas Airways Limited, Mascot, New South Wales, Australia
| | - Robyn N. Hall
- National Incident Centre, The Australian Government Department of Health, Canberra, Australian Capital Territory, Australia
| | - Luis Furuya-Kanamori
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Herston, Queensland, Australia
| | - Bette Liu
- School of Population Health, University of New South Wales, Kensington, New South Wales, Australia
| | | | - Toby Regan
- New Zealand Ministry of Health, Wellington, New Zealand
| | - Molly Halder
- New Zealand Ministry of Health, Wellington, New Zealand
| | - Catherine Kelaher
- National Incident Centre, The Australian Government Department of Health, Canberra, Australian Capital Territory, Australia
| | - Martyn D. Kirk
- National Centre for Epidemiology and Population Health, The Australian National University, Canberra, Australian Capital Territory, Australia
- National Incident Centre, The Australian Government Department of Health, Canberra, Australian Capital Territory, Australia
- * E-mail:
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Zhang B, Deng W, Xu Z. Mechanism of Ligand‐Controlled Chemoselectivity‐Switchable Ni‐Catalyzed C−N Cross‐Coupling of Amine. ChemistrySelect 2022. [DOI: 10.1002/slct.202103723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bo Zhang
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
| | - Wei Deng
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
| | - Zheng‐Yang Xu
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
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Deal A, Halliday R, Crawshaw AF, Hayward SE, Burnard A, Rustage K, Carter J, Mehrotra A, Knights F, Campos-Matos I, Majeed A, Friedland JS, Edelstein M, Mounier-Jack S, Hargreaves S. Migration and outbreaks of vaccine-preventable disease in Europe: a systematic review. THE LANCET. INFECTIOUS DISEASES 2021; 21:e387-e398. [PMID: 34626552 DOI: 10.1016/s1473-3099(21)00193-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/04/2021] [Accepted: 03/17/2021] [Indexed: 12/25/2022]
Abstract
Migrant populations are one of several underimmunised groups in the EU or European Economic Area (EU/EEA), yet little is known about their involvement in outbreaks of vaccine-preventable diseases. This information is vital to develop targeted strategies to improve the health of diverse migrant communities. We did a systematic review (PROSPERO CRD42019157473; Jan 1, 2000, to May 22, 2020) adhering to PRISMA guidelines, to identify studies on vaccine-preventable disease outbreaks (measles, mumps, rubella, diphtheria, pertussis, polio, hepatitis A, varicella, Neisseria meningitidis, and Haemophilus influenzae) involving migrants residing in the EU/EEA and Switzerland. We identified 45 studies, reporting on 47 distinct vaccine-preventable disease outbreaks across 13 countries. Most reported outbreaks involving migrants were of measles (n=24; 6496 cases), followed by varicella (n=11; 505 cases), hepatitis A (n=7; 1356 cases), rubella (n=3; 487 cases), and mumps (n=2; 293 cases). 19 (40%) outbreaks, predominantly varicella and measles, were reported in temporary refugee camps or shelters. Of 11 varicella outbreaks, nine (82%) were associated with adult migrants. Half of measles outbreaks (n=11) were associated with migrants from eastern European countries. In conclusion, migrants are involved in vaccine-preventable disease outbreaks in Europe, with adult and child refugees residing in shelters or temporary camps at particular risk, alongside specific nationality groups. Vulnerability varies by disease, setting, and demographics, highlighting the importance of tailoring catch-up vaccination interventions to specific groups in order to meet regional and global vaccination targets as recommended by the new Immunisation Agenda 2030 framework for action. A better understanding of vaccine access and intent in migrant groups and a greater focus on co-designing interventions is urgently needed, with direct implications for COVID-19 vaccine delivery.
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Affiliation(s)
- Anna Deal
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK; Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
| | - Rae Halliday
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - Alison F Crawshaw
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - Sally E Hayward
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK; Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
| | - Amelia Burnard
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - Kieran Rustage
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - Jessica Carter
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | | | - Felicity Knights
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - Ines Campos-Matos
- Public Health England, London, UK; UCL Collaborative Centre for Inclusion Health, University College London, London, UK
| | - Azeem Majeed
- Department of Primary Care & Public Health, Imperial College London, London, UK
| | - Jon S Friedland
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | | | - Sandra Mounier-Jack
- Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
| | - Sally Hargreaves
- The Migrant Health Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK.
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Borisova OY, Gadua NT, Pimenova AS, Chaplin AV, Chagina IA, Urban YN, Maksimova NM, Korzhenkova MP, Afanasiev SS, Kafarskaya LI, Afanasyev MS, Krikun VV, Yakunina OY. Characterization of toxigenic Corynebacterium diphtheriae strains isolated in Russia. ACTA ACUST UNITED AC 2021. [DOI: 10.15789/2220-7619-cot-1272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The aim of the study was to characterize toxigenic strains of Corynebacterium diphtheriae by examining 12 toxigenic strains of C. diphtheriae isolated in Russia between January, 2017 to June, 2019. The morphological, toxigenic and biochemical properties of C. diphtheriae was studied. Genotyping of C. diphtheriae strains was performed using MLST and dtxR gene sequencing with subsequent phylogenetic analysis. Results. Toxigenic strains of C. diphtheriae were isolated in the Novosibirsk, Samara and Chelyabinsk Regions, the Khanty-Mansi Autonomous Okrug — Yugra as well as the Republic of Northern Ossetia — Alania. Among these strains, 5 were isolated from diphtheria patients (moderate disease found in one case, mild course — remaining patients) and 7 strains were isolated from bacterial carriers. In two cases C. diphtheriae from diphtheria patients were identified as ST25 sequence type, gravis variant; in one case — ST8 type, gravis variant; two cases — ST67 sequence type, mitis variant. In asymptomatic carriers of tox-positive C. diphtheriae strains they belonged to ST25 sequence type, gravis variant — in two cases, ST67 type, mitis variant — in four cases. A sequencing type was not identified in one case. All sequence types were widespread globally being presented by a large number of isolates in the PubMLST and characterized by a substantial amount of derivative sequence types. At the same time, they belonged to different clonal complexes and differed markedly from each other contributing to their reliable difference as assessed by MLST. Study of gene dtxR sequence diversity showed that all allelic variants were typical for the representatives of these sequence types. New alleles of gene dtxR were not revealed in strains examined. It was shown that non-synonymous substitution C440T leading to A147V amino acid substitution was found solely in one allele distributed in ST8, ST185, ST195 and ST451 types suggesting at late mutation. In contrast, the polymorphism C640A resulting in the amino acid substitution L214I was found not only in the same allele, but also in the basal tree branches indicating that isoleucine was in the ancestral sequence of the protein.
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Affiliation(s)
- O. Yu. Borisova
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology; Russian National Research Medical University named after N.I. Pirogov
| | - N. T. Gadua
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - A. S. Pimenova
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - A. V. Chaplin
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology; Russian National Research Medical University named after N.I. Pirogov
| | - I. A. Chagina
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - Y. N. Urban
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - N. M. Maksimova
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - M. P. Korzhenkova
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | - S. S. Afanasiev
- G.N. Gabrichevsky Research Institute for Epidemiology and Microbiology
| | | | | | - V. V. Krikun
- Nizhnevartovsk District Clinical Children’s Hospital
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Lai Y, Purnima P, Ho M, Ang M, Deepak RN, Chew KL, Vasoo S, Capulong DF, Lee V. Fatal Case of Diphtheria and Risk for Reemergence, Singapore. Emerg Infect Dis 2019; 24:2084-2086. [PMID: 30334727 PMCID: PMC6199979 DOI: 10.3201/eid2411.180198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We report a fatal autochthonous diphtheria case in a migrant worker in Singapore. This case highlights the risk for individual cases in undervaccinated subpopulations, despite high vaccination coverage in the general population. Prompt implementation of public health measures and maintaining immunization coverage are critical to prevent reemergence of diphtheria.
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Jané M, Vidal MJ, Camps N, Campins M, Martínez A, Balcells J, Martin-Gomez MT, Bassets G, Herrera-León S, Foguet A, Maresma M, Follia N, Uriona S, Pumarola T. A case of respiratory toxigenic diphtheria: contact tracing results and considerations following a 30-year disease-free interval, Catalonia, Spain, 2015. Euro Surveill 2018; 23:17-00183. [PMID: 29616610 PMCID: PMC5883453 DOI: 10.2807/1560-7917.es.2018.23.13.17-00183] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
In May 2015, following a 30-year diphtheria-free interval in Catalonia, an unvaccinated 6-year-old child was diagnosed with diphtheria caused by toxigenic Corynebacterium diphtheriae. After a difficult search for equine-derived diphtheria antitoxin (DAT), the child received the DAT 4 days later but died at the end of June. Two hundred and seventeen contacts were identified in relation to the index case, and their vaccination statuses were analysed, updated and completed. Of these, 140 contacts underwent physical examination and throat swabs were taken from them for analysis. Results were positive for toxigenic C. diphtheriae in 10 contacts; nine were asymptomatic vaccinated children who had been in contact with the index case and one was a parent of one of the nine children. Active surveillance of the 217 contacts was initiated by healthcare workers from hospitals and primary healthcare centres, together with public health epidemiological support. Lack of availability of DAT was an issue in our case. Such lack could be circumvented by the implementation of an international fast-track procedure to obtain it in a timely manner. Maintaining primary vaccination coverage for children and increasing booster-dose immunisation against diphtheria in the adult population is of key importance.
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Affiliation(s)
- Mireia Jané
- Public Health Agency of Catalonia, Barcelona and Girona, Spain,CIBER Epidemiology and Public Health (CIBERESP), Carlos III Institute of Health, Madrid, Spain
| | | | - Neus Camps
- Public Health Agency of Catalonia, Barcelona and Girona, Spain
| | - Magda Campins
- Vall d’Hebron University Hospital, Catalan Institute of Health, Barcelona, Spain
| | - Ana Martínez
- Public Health Agency of Catalonia, Barcelona and Girona, Spain,CIBER Epidemiology and Public Health (CIBERESP), Carlos III Institute of Health, Madrid, Spain
| | - Joan Balcells
- Vall d’Hebron University Hospital, Catalan Institute of Health, Barcelona, Spain
| | | | - Gloria Bassets
- Centre d’Atenció Primària d’Olot, Catalan Institute of Health, Olot, Spain
| | | | - Anton Foguet
- Fundació Hospital d’Olot i Comarcal de la Garrotxa, Olot, Spain
| | - Mar Maresma
- Public Health Agency of Catalonia, Barcelona and Girona, Spain
| | - Nuria Follia
- Public Health Agency of Catalonia, Barcelona and Girona, Spain
| | - Sonia Uriona
- Vall d’Hebron University Hospital, Catalan Institute of Health, Barcelona, Spain
| | - Tomàs Pumarola
- Vall d’Hebron University Hospital, Catalan Institute of Health, Barcelona, Spain
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