tetano
Editor, Senior Moderator
Western Pac Surveill Response J. 2012 Aug 23;3(3):76-82. doi: 10.5365/WPSAR.2012.3.2.004. Print 2012 Jul.
Influenza B outbreak in a primary school in Adelaide, Australia, 2011.
Flood L, Raupach J, D'Onise K, Russo D.
Source
Communicable Disease Control Branch, South Australian Department for Health and Ageing, Adelaide, Australia .
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.
PMID:
23908928
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/23908928
Influenza B outbreak in a primary school in Adelaide, Australia, 2011.
Flood L, Raupach J, D'Onise K, Russo D.
Source
Communicable Disease Control Branch, South Australian Department for Health and Ageing, Adelaide, Australia .
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.
PMID:
23908928
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/23908928