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An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
Published on: December 10, 2013
Airflow limitation during respiratory syncytial virus lower respiratory tract infection predicts recurrent wheezing
L Bont1, W M Van Aalderen, J Versteegh
1Wilhelmina Children's Hospital, University Medical Center, Utrecht, The Netherlands.
Insights
Infants with airflow limitation during respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) are more likely to experience recurrent wheezing. This finding helps predict future airway issues in infants after RSV LRTI.
Area of Science:
- Pediatric Pulmonology
- Viral Infections
- Epidemiology
Background:
- Respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) often leads to recurrent wheezing in infants.
- Identifying predictors for post-RSV LRTI wheezing is crucial for early intervention.
- Current clinical risk factors for predicting subsequent wheezing are not well-established.
Purpose of the Study:
- To identify clinical predictors of airway morbidity following RSV LRTI in infants.
- To investigate the predictive value of auscultatory findings during RSV LRTI for future airway issues.
Main Methods:
- A 1-year prospective follow-up study of 130 infants hospitalized with RSV LRTI.
- Recording clinical characteristics, including signs of airflow limitation (wheezing), during RSV LRTI.
- Parents prospectively recorded daily airway symptoms for 1 year post-discharge.
Main Results:
- 64% of infants exhibited signs of airflow limitation during RSV LRTI.
- Infants with airflow limitation during RSV LRTI had a significantly higher incidence of recurrent wheezing (61% vs. 21%).
- Airflow limitation during RSV LRTI independently predicted recurrent wheezing, irrespective of age, parental asthma history, or smoke exposure.
Conclusions:
- Signs of airflow limitation during RSV LRTI are the first identified clinical predictor for subsequent recurrent wheezing.
- This finding can aid in identifying infants at higher risk for persistent airway problems after RSV infection.
- Early identification of risk factors can potentially lead to targeted management strategies for post-RSV airway morbidity.
Background:
Respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) is frequently followed by recurrent wheezing. Thus far no clinical risk factors have been identified to predict which infants will have wheezing episodes subsequent to RSV LRTI.
Objective:
To determine clinical predictors for airway morbidity after RSV LRTI.
Methods:
In a 1-year follow-up study we investigated the predictive value of auscultatory findings characteristic of airflow limitation (wheezing) during RSV LRTI for subsequent airway morbidity. Clinical characteristics, including the presence or absence of signs of airflow limitation, of hospitalized infants with RSV LRTI were prospectively recorded during 2 winter epidemics. During a 1-year follow-up period parents of 130 infants recorded daily airway symptoms.
Outcome Measure:
Recurrent wheezing defined as > or = 2 episodes of wheezing.
Results:
Signs of airflow limitation during RSV LRTI were absent in 47 (36%) infants and present in 83 (64%) infants. Recurrent wheezing was recorded in 10 (21%) infants without signs of airflow limitation and in 51 (61%) with signs of airflow limitation during initial RSV LRTI (relative risk, 0.29, P < 0.001). In a multiple logistic regression model, airflow limitation during initial RSV LRTI proved independent from other clinical parameters, including age, parental history of asthma and smoke exposure.
Conclusions:
A sign of airflow limitation during RSV LRTI is the first useful clinical predictor for subsequent recurrent wheezing.
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