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Int J Infect Dis. 2011 Feb;15(2):e122-30. doi: 10.1016/j.ijid.2010.08.006. Epub 2010 Dec 8.

Novel influenza A (H1N1): clinical features of pediatric hospitalizations in two successive waves.

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1
Infectious Disease Division, Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, 3175 Chemin de cote Sainte-Catherine, H3T 1C5 Montreal, QC, Canada.

Abstract

OBJECTIVE:

To describe and compare the characteristics of children hospitalized with novel influenza A (H1N1) during two successive waves.

METHODS:

This was a medical chart review of all children hospitalized in a French Canadian pediatric hospital in Montreal in the spring and fall of 2009 with a positive real-time polymerase chain reaction for novel influenza A (H1N1) and flu-like symptoms.

RESULTS:

We included 202 children with a median age of 4.9 (range 0.1-18) years. Demographic and clinical features of the children in the two waves were similar. One or more underlying medical conditions were found in 59% of the children. Clinical findings at admission were: fever (98%), cough (88%), congestion/rhinorrhea (58%), gastrointestinal symptoms (47%), oxygen saturation below 95% (33%), sore throat (20%), and neurological symptoms (9%). Admission to the intensive care unit was required for 22 (11%) children, and 14 patients needed respiratory support. During the second wave, the median duration of stay was shorter (3 vs. 4 days, p=0.003) and oseltamivir was used more often (84% vs. 40%, p<0.001).

CONCLUSIONS:

Children hospitalized during the two successive waves of H1N1 were mainly school-aged and suffered from moderate disease. Although clinical features and severity of disease were similar, oseltamivir was prescribed more frequently and the length of hospital stay was shorter in the second wave.

PMID:
21144785
DOI:
10.1016/j.ijid.2010.08.006
[Indexed for MEDLINE]
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