Dataset Information

Influenza A and Respiratory Syncytial Virus Trigger a Cellular Response That Blocks Severe Acute Respiratory Syndrome Virus 2 Infection in the Respiratory Tract.

ABSTRACT:

Background

Multiple viruses cocirculate and contribute to the burden of respiratory disease. Virus-virus interactions can decrease susceptibility to infection and this interference can have an epidemiological impact. As humans are normally exposed to a community of cocirculating respiratory viruses, experimental coinfection studies are necessary to understand the disease mechanisms of multipathogen systems. We aimed to characterize interactions within the respiratory tract between severe acute respiratory syndrome virus 2 (SARS-CoV-2) and 2 major respiratory viruses: influenza A virus (IAV), and respiratory syncytial virus (RSV).

Methods

We performed single infections and coinfections with SARS-CoV-2 combined with IAV or RSV in cultures of human bronchial epithelial cells. We combined microscopy with quantification of viral replication in the presence or absence of an innate immune inhibitor to determine changes in virus-induced pathology, virus spread, and virus replication.

Results

SARS-CoV-2 replication is inhibited by both IAV and RSV. This inhibition is dependent on a functional antiviral response and the level of inhibition is proportional to the timing of secondary viral infection.

Conclusions

Infections with other respiratory viruses might provide transient resistance to SARS-CoV-2. It would therefore be expected that the incidence of coronavirus disease 2019 (COVID-19) may decrease during periods of high circulation of IAV and RSV.

SUBMITTER: Dee K

PROVIDER: S-EPMC10266949 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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Publications

Influenza A and Respiratory Syncytial Virus Trigger a Cellular Response That Blocks Severe Acute Respiratory Syndrome Virus 2 Infection in the Respiratory Tract.

Dee Kieran K Schultz Verena V Haney Joanne J Bissett Laura A LA Magill Callum C Murcia Pablo R PR

The Journal of infectious diseases 20230601 12

<h4>Background</h4>Multiple viruses cocirculate and contribute to the burden of respiratory disease. Virus-virus interactions can decrease susceptibility to infection and this interference can have an epidemiological impact. As humans are normally exposed to a community of cocirculating respiratory viruses, experimental coinfection studies are necessary to understand the disease mechanisms of multipathogen systems. We aimed to characterize interactions within the respiratory tract between severe ...[more]

PMID: 36550077

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Project description:ImportanceClinical trials have demonstrated high vaccine efficacy (VE) against lower respiratory tract disease (LRTD) but enrolled a smaller proportion of persons aged 75 years or older and those with comorbidities than seen in highest-risk populations in clinical practice settings. Additionally, VE against respiratory syncytial virus (RSV)-related hospitalizations and emergency department (ED) visits is not yet fully described.ObjectiveTo estimate Respiratory Syncytial Virus Prefusion F (RSVpreF) effectiveness in older adults.Design, setting, and participantsThis was a retrospective case-control study with a test negative design. Cases were adults aged 60 years or older with hospitalizations or ED visits at Kaiser Permanente of Southern California for LRTD from November 24, 2023, to April 9, 2024, who had respiratory swabs collected and tested for RSV. Two control definitions were prespecified: (1) strict controls included RSV-negative LRTD events that were negative for human metapneumovirus, SARS-CoV-2, and influenza, and positive for a nonvaccine preventable cause (primary) and (2) broad controls included all RSV-negative LRTD events (sensitivity analysis). Enhanced specimen collection was conducted to salvage clinical respiratory swabs not tested for RSV during routine care. Data were analyzed from May to September 2024.ExposureRSVpreF vaccine receipt during the first RSV season after licensure and 21 or more days before LRTD event.Main outcomes and measuresEstimated VE against first episode of RSV-related LRTD hospitalization or ED visit.ResultsA total of 7047 LRTD-related hospitalizations or ED encounters with RSV testing results were included. The mean (SD) age was 76.8 (9.6) years; 3819 (54.2%) were female; 839 (11.9%) were non-Hispanic Asian or Pacific Islander, 2323 (33.0%) were Hispanic, 1197 (17.0%) were non-Hispanic Black, and 2602 (36.9%) were non-Hispanic White; 998 (14.2%) were immunocompromised; and 6573 (93.3%) had 1 or more Charlson comorbidity. Using strict controls, estimated adjusted VE was 91% (95% CI, 59%-98%). Using broad controls, estimated adjusted VE was 90% (95% CI, 59%-97%).Conclusions and relevanceIn a high-risk, general population, RSVpreF vaccination conferred protection against RSV-related LRTD in the hospital and ED settings among US adults aged 60 years or older, the majority of whom were aged 75 years or older and had comorbidities. These data support use of this vaccine in older adults.

Dataset Information

Influenza A and Respiratory Syncytial Virus Trigger a Cellular Response That Blocks Severe Acute Respiratory Syndrome Virus 2 Infection in the Respiratory Tract.

Background

Methods

Results

Conclusions

Publications

Influenza A and Respiratory Syncytial Virus Trigger a Cellular Response That Blocks Severe Acute Respiratory Syndrome Virus 2 Infection in the Respiratory Tract.

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