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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
Otitis and respiratory distress episodes following a respiratory syncytial virus infection
D A Kafetzis1, H Astra, M Tsolia
1Second Department of Pediatrics, University of Athens, P. & A. Kyriakou Children's Hospital, Athens, Greece. kafetzis@ath.forthnet.gr
Insights
Respiratory syncytial virus (RSV) significantly contributes to acute otitis media (AOM) in hospitalized infants with respiratory distress. Recurrent respiratory distress did not correlate with RSV infection in this study.
Area of Science:
- Pediatrics
- Infectious Diseases
- Otolaryngology
Background:
- Acute otitis media (AOM) and respiratory distress are common in young children.
- Respiratory syncytial virus (RSV) is a frequent cause of respiratory illness in infants.
- The relationship between RSV, AOM, and recurrent respiratory distress requires further investigation.
Purpose of the Study:
- To determine the incidence of AOM in children under two years old hospitalized for respiratory distress.
- To assess the recurrence of respiratory distress in relation to RSV infection status.
- To document these occurrences over two consecutive RSV seasons.
Main Methods:
- Prospective study of 347 children hospitalized for respiratory distress.
- Daily evaluation for AOM during hospitalization.
- Follow-up examinations at 6 weeks and 6 months post-discharge for AOM and respiratory distress recurrence.
- RSV testing performed on all participants.
Main Results:
- RSV was detected in 54.8% of the enrolled children.
- AOM occurred more frequently in RSV-positive children during hospitalization (16.8%) compared to RSV-negative children (8.3%).
- While AOM rates were higher in RSV-positive children early post-discharge, they were similar at 6 months; recurrent respiratory distress did not correlate with RSV status.
Conclusions:
- RSV is a significant factor in the development of AOM in young children hospitalized with respiratory distress.
- The study suggests no correlation between prior RSV infection and subsequent episodes of acute respiratory distress.
- Longer-term follow-up is recommended to fully understand the implications of RSV infection.
Objective:
To document, over two consecutive respiratory syncytial virus (RSV) seasons, the occurrence of acute otitis media (AOM) and recurrence of respiratory distress in children < 2 years of age hospitalized for respiratory distress.
Methods:
Patients were examined during hospitalization and at 6 weeks and 6 months after discharge. RSV testing was performed on all patients, and hospitalized patients were evaluated daily for the occurrence of AOM.
Results:
In total, 347 children were enrolled; 54.8% were RSV positive, and 45.2% were RSV negative. Children were most frequently diagnosed as having bronchiolitis (71.9%) or asthmatic bronchitis (17.9%); other diagnoses included pneumonia, laryngitis, and rhinitis. During hospitalization, AOM was diagnosed in 16.8% of RSV-positive versus 8.3% of RSV-negative children (P < 0.05). Six weeks after discharge, AOM was reported in 10.4% of RSV-positive as compared with 5.8% of RSV-negative patients. Six months later, AOM was reported in 2.9% of the RSV-positive and 7.6% of the RSV-negative patients. A second episode of acute respiratory distress, which either required (9) or did not require (35) hospitalization, occurred in 18.4% of the total population, with similar proportions of RSV-positive and RSV-negative children (17% versus 18.6%).
Conclusion:
We conclude that RSV appears to be an important contributing factor for the occurrence of AOM in young children hospitalized with respiratory distress. The occurrence of a second episode of acute respiratory distress did not appear to correlate with the previous RSV infection, but longer-term follow-up is required.
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