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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
[Clinical and epidemiological survey of RSV infection in infants]
G Cabrera Roca1, F Domínguez Ortega, B Lafarga Capuz
1Departamento de Pediatría, Hospital Materno-Infantil, Las Palmas.
Insights
Respiratory Syncytial Virus (RSV) infections are common in hospitalized infants, particularly during winter months. This study highlights the seasonal patterns and clinical features of RSV in this vulnerable population.
Area of Science:
- Pediatric Infectious Diseases
- Virology
- Epidemiology
Context:
- Respiratory Syncytial Virus (RSV) is a leading cause of lower respiratory tract infections in infants.
- Hospitalized infants represent a significant population affected by RSV, necessitating a deeper understanding of its clinical and epidemiological profile.
- Previous studies have indicated seasonal trends, but detailed clinical and diagnostic characteristics in hospitalized infants require further elucidation.
Purpose:
- To prospectively assess the clinical and epidemiological characteristics of RSV infections in hospitalized infants.
- To analyze the seasonal variation in RSV incidence and its correlation with hospital admissions.
- To evaluate the utility of diagnostic markers and radiological findings in differentiating RSV-related respiratory illnesses.
Summary:
- A 3-year prospective study of 322 hospitalized infants diagnosed with RSV infections via EIA and serology.
- RSV infections peaked in winter months (December, January, November, February), preceding increased respiratory admissions.
- Erythrocyte sedimentation rate was higher in pneumonias than bronchiolitis/bronchitis. Chest X-rays revealed air trapping in 48% and condensation in 16% of cases.
Impact:
- Provides crucial data on the epidemiology and clinical presentation of RSV in hospitalized infants, aiding in early diagnosis and management.
- Informs public health strategies for managing RSV outbreaks, particularly during peak winter seasons.
- Contributes to the understanding of diagnostic markers and radiological findings in pediatric RSV infections, potentially refining diagnostic criteria.
Objective:
A prospective study was performed to assess the clinical and epidemiological characteristics of RSV infections in hospitalized infants.
Patients And Methods:
Between October 1988 and September 1991, we studied 322 cases of RSV respiratory infections diagnosed by EIA of nasopharyngeal lavage and/or serology by complement fixation. Clinical, analytical and radiological data were reviewed.
Results:
Time-analysis showed higher incidences of RSV infections in December, January, November and February, with an increase in hospital admissions due to respiratory problems before the peak in RSV infections. The mean age of the population was 6.84 +/- 7.07 months. The mean weight was 7.4 +/- 2.68 kg and the sex distribution was 61.2% males and 38.8% females. Blood count was not useful in the differential diagnosis between bronchiolitis/bronchitis and pneumonias, but the erythrocyte sedimentation rate was higher in the last group (25.2 +/- 20.1 versus 38.2 +/- 29.5, t = 2.52, p < 0.05). Clinical status, with a mean value of 6.09 +/- 2.31 as assessed by the modified Downes's Score, showed a significant relationship with the time of hospitalization (mean: 8.77 days; r = 0.2108, p < 0.01), but not with gas exchange, weight or age. Chest X-rays showed air trapping in 48% of the cases, but the incidence of condensation was lower than in other series (16%), probably because we do not believe that any infiltration of the lungs on chest roentgenograms places the patients in the pneumonia category.
Conclusions:
We found a high frequency of RSV infection among hospitalized infants and there was seasonal variation with a higher incidence during the winter months.
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