Influenza B outbreak in a primary school in Adelaide, Australia, 2011.
Western Pac Surveill Response J
; 3(3): 76-82, 2012 Jul.
Article
em En
| MEDLINE
| ID: mdl-23908928
ABSTRACT
INTRODUCTION:
This report describes a 2011 seasonal influenza B outbreak in a metropolitan primary school in Australia with 179 students.METHODS:
Epidemiological, microbiological and environmental investigations were undertaken. A retrospective cohort study was conducted using a questionnaire that included demographic data, details of illness, chronic health conditions and vaccination status. Influenza-like illness (ILI) was defined as fever plus cough and/or sore throat. Analysis of ILI was undertaken with the χ(2) test and Fisher's exact test.RESULTS:
Seventy-two questionnaire respondents (75%) reported illness during the outbreak - 43 with ILI, giving an attack rate of 45%. There was no association between ILI and age or chronic lung disease. Six (6%) students were vaccinated against influenza before the outbreak; although four became ill, none satisfied the ILI case definition. Seven students were positive for influenza B including two confirmed as B/Brisbane/60/2008-like; one student was positive for rhinovirus and another for metapneumovirus. The recommended influenza vaccine matched the circulating influenza strains.DISCUSSION:
This cohort study estimated a high ILI attack rate and demonstrated low influenza vaccine coverage within the setting of a primary school. Gastrointestinal symptoms, in addition to constitutional and respiratory symptoms, were common.
Texto completo:
1
Bases de dados:
MEDLINE
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Western Pac Surveill Response J
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Austrália