Renato de Sousa Paulino, Daniela Bernardes Borges da Silva, Katia Correa de Oliveira Santos, Margarete Aparecida Benega and Terezinha Maria de Paiva*
Volume4-Issue10
Dates: Received: 2023-09-16 | Accepted: 2023-10-10 | Published: 2023-10-11
Pages: 1394-1404
Abstract
Background and objective: During the 2009 influenza A (H1N1) pandemic, 60% of the respiratory specimens collected from patients under surveillance for influenza-like illness (ILI) in São Paulo, Brazil, tested negative for influenza A and B by Real-Time RT-PCR (RT-qPCR) assays. In this retrospective study, we identified the diversity of other respiratory viruses associated with ILI during the pandemic period and added the benefit of RT-qPCR for their detection.
Methods: Five-hundred and forty-two influenza RT-qPCR negative respiratory specimens from ILI patients collected from Jan - Dec 2009, that also tested negative by a commercial Indirect Immuno Fluorescence (IIF) assay for the Respiratory Syncytial Virus (RSV), Parainfluenza (PIV) PIV1, PIV2, PIV 3 and Adenovirus (AdV) were retested by a panel of RT-qPCR assays for the other respiratory viruses, including RSV, Human Metapneumovirus (HMPV), PIV 1-4, AdV, Human Coronaviruses (HCoV) OC43, 229E, NL63 and HKU1, Rhinovirus (RV), Enterovirus (EV) and Human Bocavirus (HBoV).
Results: Of the 542 negative specimens, 428 (78%) were positive by RT-qPCR for another respiratory virus: In descending order: RV (149, 27%); RSV (41, 8%); AdV (32, 6%); HMPV (29, 5%); PIV3 (19, 4%); PIV1 (3, 1%); HCoV-OC43 (9, 2%); HBoV (9, 2%); PIV4 (6, 1%); HCoV-HKU1 (6, 1%); EV (5, 1%); HCoV-229E 4 (4, 1%); HCoV-NL63 (3, 1%). Co-detections of two viruses (98, 18%) and three viruses (12, 2%) were common.
Conclusion: This retrospective study revealed a high prevalence of respiratory viruses other than influenza associated with ILI during the pandemic period and highlights the superiority of RT-qPCR over IIF for ILI surveillance.
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DOI: 10.37871/jbres1809
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© 2023 de Sousa Paulino R, et al. Distributed under Creative Commons CC-BY 4.0
How to cite this article
de Sousa Paulino R, da Silva DBB, de Oliveira Santos KC, Benega MA, de Paiva TM. Diversity of Non-Infl uenza Respiratory Viruses Associated with Infl uenza-Like Illness during 2009 pre and pandemic periods in São Paulo, Brazil, a Historical Overview. J Biomed Res Environ Sci. 2023 Oct 11; 4(10): 1394-1404. doi: 10.37871/jbres1809, Article ID: JBRES1809, Available at: https://www.jelsciences.com/articles/jbres1809.pdf
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