ArticleJornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia
Lack of association between viral load and severity of acute bronchiolitis in infants.
Article in Jornal brasileiro de pneumologia : publicacao oficial da Sociedade Brasileira de Pneumologia e Tisilogia. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.
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Who cites it
8 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Pooled it
- Maternal Immunization Against Respiratory Syncytial Virus: An Integrative Review of Efficacy, Safety, and Implementation.Vaccines · 2026Review
- Severe Influenza Virus and Respiratory Syncytial Virus Infections in Intensive Care Over the Last 15 Years.Cureus · 2023Article
- Respiratory Syncytial Virus-Load Kinetics and Clinical Course of Acute Bronchiolitis in Hospitalized Infants: Interim Results and Review of the Literature.Pathogens (Basel, Switzerland) · 2023Article
- Immunogenicity and protective efficacy of an RSV G S177Q central conserved domain nanoparticle vaccine.Frontiers in immunology · 2023Article
- Etiology, clinical characteristics and coinfection status of bronchiolitis in Suzhou.BMC infectious diseases · 2021Article
- A post-incorporation study on the use of palivizumab in the Brazilian public health system.Revista do Instituto de Medicina Tropical de Sao Paulo · 2021Article
- Elevated Levels of Type 2 Respiratory Innate Lymphoid Cells in Human Infants with Severe Respiratory Syncytial Virus Bronchiolitis.American journal of respiratory and critical care medicine · 2019Article
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Authors and funding
10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objective: To investigate the correlation between respiratory syncytial viral load and length of hospitalization in infants with acute wheezing episodes.
methods: This was a two-year, cross-sectional study of infants ≤ 12 months of age with bronchiolitis at the time of admission to a tertiary hospital. For the identification of respiratory viruses, nasopharyngeal secretions were collected. Samples were analyzed (throughout the study period) by direct immunofluorescence and (in the second year of the study) by quantitative real-time PCR. We screened for three human viruses: rhinovirus, respiratory syncytial virus, and metapneumovirus.
results: Of 110 samples evaluated by direct immunofluorescence, 56 (50.9%) were positive for a single virus, and 16 (14.5%) were positive for two or more viruses. Among those 72 samples, the most prevalent virus was respiratory syncytial virus, followed by influenza. Of 56 samples evaluated by quantitative real-time PCR, 24 (42.8%) were positive for a single virus, and 1 (1.7%) was positive for two viruses. Among those 25 samples, the most prevalent virus was again respiratory syncytial virus, followed by human rhinovirus. Coinfection did not influence the length of the hospital stay or other outcome s. In addition, there was no association between respiratory syncytial virus load and the length of hospitalization.
conclusions: Neither coinfection nor respiratory syncytial viral load appears to influence the outcomes of acute bronchiolitis in infants. OBJETIVO:: Investigar a correlação entre a carga viral do vírus sincicial respiratório e o tempo de internação hospitalar em lactentes com episódios de sibilância aguda. MÉTODOS:: Este foi um estudo transversal de dois anos envolvendo lactentes de até 12 meses de idade com bronquiolite no momento da internação em um hospital terciário. Para a identificação dos vírus respiratórios foram coletadas secreções nasofaríngeas. As amostras foram analisadas (por todo o período do estudo) por imunofluorescência direta e (no segundo ano do estudo) por PCR quantitativa em tempo real para três vírus humanos (rinovírus, vírus sincicial respiratório e metapneumovírus). RESULTADOS:: Das 110 amostras avaliadas por imunofluorescência direta, 56 (50,9%) foram positivas para um único vírus, e 16 (14,5%) foram positivas para dois ou mais vírus. Nessas 72 amostras, o vírus mais prevalente foi o vírus sincicial respiratório, seguido por influenza. Das 56 amostras avaliadas por PCR quantitativa em tempo real, 24 (42,8%) foram positivas para um único vírus, e 1 (1,7%) foi positiva para dois vírus. Nessas 25 amostras, o vírus mais prevalente foi o vírus sincicial respiratório, seguido por rinovírus humano. A coinfecção não influenciou o tempo de internação ou outros desfechos. Além disso, não houve associação entre a carga viral de vírus sincicial respiratório e o tempo de internação. CONCLUSÕES:: A coinfecção e a carga viral do vírus sincicial respiratório não parecem influenciar os desfechos em lactentes com bronquiolite aguda.
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