RSV and rhinovirus increase pneumococcal carriage acquisition and density, whereas nasal inflammation is associated with bacterial shedding.

Mitsi, Elena, Nikolaou, Elissavet, Goncalves, Andre, Blizard, Annie, Hill, Helen, Farrar, Madlen, Hyder-Wright, Angela, Akeju, Oluwasefunmi, Hamilton, Josh, Howard, Ashleigh, Elterish, Filora, SolorzanoGonzalez, Carla, Robinson, Ryan, Reiné, Jesús, Collins, Andrea ORCID: https://orcid.org/0000-0002-4094-1572, Gordon, Stephen ORCID: https://orcid.org/0000-0001-6576-1116, Moxon, Richard E, Weiser, Jeffrey N, Bogaert, Debby and Ferreira, Daniela ORCID: https://orcid.org/0000-0002-0594-0902 (2024) 'RSV and rhinovirus increase pneumococcal carriage acquisition and density, whereas nasal inflammation is associated with bacterial shedding.'. Cell Host & Microbe, Vol 32, Issue 9, pp. 1608-1620.

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Abstract

Epidemiological studies report the impact of co-infection with pneumococcus and respiratory viruses upon disease rates and outcomes, but their effect on pneumococcal carriage acquisition and bacterial load is scarcely described. Here, we assess this by combining natural viral infection with controlled human pneumococcal infection in 581 healthy adults screened for upper respiratory tract viral infection before intranasal pneumococcal challenge. Across all adults, respiratory syncytial virus (RSV) and rhinovirus asymptomatic infection confer a substantial increase in secondary infection with pneumococcus. RSV also has a major impact on pneumococcal density up to 9 days post challenge. We also study rates and kinetics of bacterial shedding through the nose and oral route in a subset. High levels of pneumococcal colonization density and nasal inflammation are strongly correlated with increased odds of nasal shedding as opposed to cough shedding. Protection against respiratory viral infections and control of pneumococcal density may contribute to preventing pneumococcal disease and reducing bacterial spread.

Item Type:	Article
Subjects:	WC Communicable Diseases > Infection. Bacterial Infections > Bacterial Infections > WC 200 Bacterial infections (General or not elsewhere classified) WC Communicable Diseases > Virus Diseases > Viral Respiratory Tract Infections. Respirovirus Infections > WC 510 Common cold
Faculty: Department:	Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):	https://doi.org/10.1016/j.chom.2024.07.024
SWORD Depositor:	JISC Pubrouter
Depositing User:	JISC Pubrouter
Date Deposited:	26 Nov 2024 15:10
Last Modified:	26 Nov 2024 15:10
URI:	https://archive.lstmed.ac.uk/id/eprint/25304

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