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Nikolaou E, German EL, Howard A, Nabwera HM, Matope A, Robinson R, Shiham F, Liatsikos K, McNamara C, Kattera S, Carter K, Parry CM, Read JM, Allen SJ, Urban BC, Hawcutt DB, Hill H, Collins AM, Ferreira DM. Assessing the use of minimally invasive self-sampling at home for long-term monitoring of the microbiota within UK families. Sci Rep 2023; 13:18201. [PMID: 37875557 PMCID: PMC10598218 DOI: 10.1038/s41598-023-45574-6] [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: 06/09/2023] [Accepted: 10/21/2023] [Indexed: 10/26/2023] Open
Abstract
Monitoring the presence of commensal and pathogenic respiratory microorganisms is of critical global importance. However, community-based surveillance is difficult because nasopharyngeal swabs are uncomfortable and painful for a wide age range of participants. We designed a methodology for minimally invasive self-sampling at home and assessed its use for longitudinal monitoring of the oral, nasal and hand microbiota of adults and children within families. Healthy families with two adults and up to three children, living in and near Liverpool, United Kingdom, self-collected saliva, nasal lining fluid using synthetic absorptive matrices and hand swabs at home every two weeks for six months. Questionnaires were used to collect demographic and epidemiological data and assess feasibility and acceptability. Participants were invited to take part in an exit interview. Thirty-three families completed the study. Sampling using our approach was acceptable to 25/33 (76%) families, as sampling was fast (76%), easy (76%) and painless (60%). Saliva and hand sampling was acceptable to all participants of any age, whereas nasal sampling was accepted mostly by adults and children older than 5 years. Multi-niche self-sampling at home can be used by adults and children for longitudinal surveillance of respiratory microorganisms, providing key data for design of future studies.
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Affiliation(s)
- E Nikolaou
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
- Infection and Immunity, Murdoch Children's Research Institute, Parkville, VIC, 3050, Australia.
- Microbiology and Immunology Department, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Parkville, VIC, Australia.
| | - E L German
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - A Howard
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - H M Nabwera
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Alder Hey Children's Hospital, Liverpool, UK
- Centre of Excellence in Women and Child Health, Aga Khan University, Nairobi, Kenya
| | - A Matope
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - R Robinson
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - F Shiham
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - K Liatsikos
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - C McNamara
- Alder Hey Children's Hospital, Liverpool, UK
| | - S Kattera
- Alder Hey Children's Hospital, Liverpool, UK
| | - K Carter
- Alder Hey Children's Hospital, Liverpool, UK
| | - C M Parry
- Alder Hey Children's Hospital, Liverpool, UK
| | - J M Read
- Lancaster Medical School, Lancaster University, Lancaster, UK
| | - S J Allen
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Edward Francis Small Teaching Hospital, Banjul, The Gambia
| | - B C Urban
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, OX3 7LE, UK
| | - D B Hawcutt
- Alder Hey Children's Hospital, Liverpool, UK
- University of Liverpool, Liverpool, UK
| | - H Hill
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - A M Collins
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
- Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - D M Ferreira
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, OX3 7LE, UK.
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German EL, Solórzano C, Sunny S, Dunne F, Gritzfeld JF, Mitsi E, Nikolaou E, Hyder-Wright AD, Collins AM, Gordon SB, Ferreira DM. Protective effect of PCV vaccine against experimental pneumococcal challenge in adults is primarily mediated by controlling colonisation density. Vaccine 2019; 37:3953-3956. [PMID: 31176540 PMCID: PMC6611220 DOI: 10.1016/j.vaccine.2019.05.080] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 05/20/2019] [Accepted: 05/28/2019] [Indexed: 11/03/2022]
Abstract
Widespread use of Pneumococcal Conjugate Vaccines (PCV) has reduced vaccine-type nasopharyngeal colonisation and invasive pneumococcal disease. In a double-blind, randomised controlled trial using the Experimental Human Pneumococcal Challenge (EHPC) model, PCV-13 (Prevenar-13) conferred 78% protection against colonisation acquisition and reduced bacterial intensity (AUC) as measured by classical culture. We used a multiplex qPCR assay targeting lytA and pneumococcal serotype 6A/B cpsA genes to re-assess the colonisation status of the same volunteers. Increase in detection of low-density colonisation resulted in reduced PCV efficacy against colonisation acquisition (29%), compared to classical culture (83%). For experimentally colonised volunteers, PCV had a pronounced effect on decreasing colonisation density. These results obtained in adults suggest that the success of PCV vaccination could primarily be mediated by the control of colonisation density. Studies assessing the impact of pneumococcal vaccines should allow for density measurements in their design.
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Affiliation(s)
- E L German
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - C Solórzano
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - S Sunny
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - F Dunne
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - J F Gritzfeld
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - E Mitsi
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - E Nikolaou
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | | | - A M Collins
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - S B Gordon
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
| | - D M Ferreira
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom.
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