Epidemiology of influenza B in Australia: 2001-2014 influenza seasons.
Influenza Other Respir Viruses
; 11(2): 102-109, 2017 03.
Article
em En
| MEDLINE
| ID: mdl-27650482
ABSTRACT
BACKGROUND:
Influenza B is characterised by two antigenic lineages B/Victoria and B/Yamagata. These lineages circulate together with influenza A during influenza seasons, with varying incidence from year to year and by geographic region.OBJECTIVE:
To determine the epidemiology of influenza B relative to influenza A in Australia.METHODS:
Laboratory-confirmed influenza notifications between 2001 and 2014 in Australia were obtained from the Australian National Notifiable Diseases Surveillance System.RESULTS:
A total of 278 485 laboratory-confirmed influenza cases were notified during the study period, comprising influenza A (82.2%), B (17.1%) and 'other and untyped' (0.7%). The proportion of notifications that were influenza B was highest in five- to nine-year-olds (27.5%) and lowest in persons aged 85 years and over (11.5%). Of all B notifications with lineage determined, 77.1% were B/Victoria and 22.9% were B/Yamagata infections. Mismatches between the dominant B lineage in a season and the trivalent vaccine B lineage occurred in over one-third of seasons during the study years. In general, influenza B notifications peaked later than influenza A notifications.CONCLUSION:
The proportion of circulating influenza B in Australia during 2001-2014 was slightly lower than the global average and was dominated by B/Victoria. Compared with influenza A, influenza B infection was more common among older children and young adults and less common in the very elderly. Influenza B lineage mismatch with the trivalent vaccine occurred about one-third of the time.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vírus da Influenza B
/
Vigilância da População
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Influenza Humana
Tipo de estudo:
Diagnostic_studies
/
Screening_studies
Limite:
Adolescent
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Adult
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Aged
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Aged80
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
País/Região como assunto:
Oceania
Idioma:
En
Revista:
Influenza Other Respir Viruses
Assunto da revista:
VIROLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Austrália