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  • Title: [New respiratory viruses in children 2 months to 3 years old with recurrent wheeze].
    Author: Maffey AF, Venialgo CM, Barrero PR, Fuse VA, Márques Mde L, Saia M, Villalba A, Teper AM, Mistchenko AS.
    Journal: Arch Argent Pediatr; 2008 Aug; 106(4):302-9. PubMed ID: 18766276.
    Abstract:
    INTRODUCTION: Respiratory viruses are associated with respiratory exacerbations, more frequently Respiratory Syncytial Virus in infants and Rhinovirus in children. OBJECTIVE: To evaluate the prevalence and epidemiological features of newer and traditional respiratory viruses in infants and young children with recurrent wheeze. MATERIAL AND METHODS: Cross sectional, prospective and descriptive study. Patients with recurrent wheeze and risk factors for asthma, age 2 months to 3 years, hospitalized with bronchial obstruction were included. On admission a respiratory sample was obtained through a nasopharyngeal aspirate. Immunofluorescence was performed to detect Respiratory Syncytial Virus, Adenovirus, Parainfluenza 1, 2, 3 and Influenza A and B. Polymerase Chain Reaction was used to detect Rhinovirus, Enterovirus, Metapneumovirus, Bocavirus, Adenovirus and Coronavirus. RESULTS: 119 patients (61 female), age (x E DS) 1.5 E 0.9 years were included. Days on admission and on oxygen requirement were, respectively (x E DS): 6.3 E 2.9 y 4.4 E 2.7. One hundred and two (86%) positive cases were diagnosed. Fifty five percent of the viruses were detected by Immunofluorescence and 45% by Polymerase Chain Reaction. A single virus was present in 75% of the samples, 22% had a double co-infection and 3% a triple virus co-infection. Overall, the prevalence of detected respiratory viruses was: Respiratory Syncytial Virus 55 (43%); Rhinovirus 30 (23%); Metapneumovirus 13 (10%); Influenza A 8 (6%); Enterovirus 6 (5%); Bocavirus 6 (5%); Adenovirus 4 (3%); Coronavirus 3 (2%); Parainfluenza 1: 2 (1%); Influenza B, 1 (1%) and Parainfluenza 3: 1 (1%). CONCLUSIONS: Infants and young children with recurrent wheeze and risk factors for asthma hospitalized for bronchial obstruction present a high prevalence of respiratory viruses. Hospital admissions were more frequent during months of higher respiratory circulation.
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