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Influenza activity in Switzerland : actual situation

 

Update 28 January 2015



Virological activity in Switzerland during the week 4/2015 

During the week 4, 132 practitioners of the Sentinel system reported 33.2 cases of influenza suspicion on 1'000 consultations.  Extrapolated to the whole population, this rate corresponds to an incidence of 275 cases of influenza illness for 100000 inhabitants. The rate is superior to the rate of the previous week (163 cases of influenza illness for 100000 inhabitants). It is greater than the swiss national epidemiological threshold.

Table 1: Incidence of influenza-like illness consultations according to age and regions for 100'000 inhabitants during week 4/2015

 
Grippebedingte Konsultationen
pro 100 000 Einwohner
Grippeaktivität
Klassierung, (Trend)
Inzidenz nach Altersklasse
0 - 4 Jahre
458
(steigend)
5 - 14 Jahre
410
(steigend)
15 - 29 Jahre
299
(steigend)
30 - 64 Jahre
258
(steigend)
>= 65 Jahre
106
(konstant)
Inzidenz nach Sentinella-Region
Region 1 (GE, NE, VD, VS)
239
weit verbreitet, (steigend)
Region 2 (BE, FR, JU)
324
weit verbreitet, (steigend)
Region 3 (AG, BL, BS, SO)
189
weit verbreitet, (steigend)
Region 4 (LU, NW, OW, SZ, UR, ZG)
240
weit verbreitet, (steigend)
Region 5 (AI, AR, GL, SG, SH, TG, ZH)
238
weit verbreitet, (steigend)
Region 6 (GR, TI)
490
weit verbreitet, (steigend)
Schweiz
275
weit verbreitet, (steigend)

Table 2: Influenza virus circulating in Switzerland and in Europe. Frequency of influenza types and subtypes isolated during the current week and the cumulated weeks since the week 40/2014 

 
Aktuelle Woche
Kumulativ
Schweiz in Woche 4/2015
Anteil Influenza-positiver Proben
(Anzahl untersuchte Proben)
50%
(82)
34%
(368)
B
12%
13%
A(H3N2)
44%
57%
A(H1N1)pdm09
7%
17%
A nicht subtypisiert
37%
13%
Europa in Woche 3/2015
Anteil Influenza-positiver Proben
(Anzahl untersuchte Proben)
40%
(1867)
15%
(13560)
B
17%
20%
A(H3N2)
53%
58%
A(H1N1)pdm09
18%
14%
A nicht subtypisiert
12%
8%
 
 
References
1. Centers for Disease Control and Prevention (CDC), http://www.cdc.gov/flu/weekly/
2. World Health Organisation (WHO), Recommended composition of influenza virus vaccines for use in the 2014 southern hemisphere influenza season http://www.who.int/influenza/vaccines/virus/recommendations/201309_recommendation.pdf
Weekly bulletin of the EISN: click here
 
 

Influenza viruses detected per week and Cases are classified according to the date when the sample was taken and
proportion of medical contacts for influenza-like illness (ILI) for 1000 consultations

FluA undet.: influenza A virus that is under subtypisation analysis 

B: influenza B viruses

A (H3N2) seasonal: influenza A (H3N2) virus
A (H1N1) seasonal: influenza A (H1N1) virus
A (H1N1) 2009: influenza A (H1N1) pandemique 2009

‰ ILI : percentage of consultation for influenza-like illness per week reported to the Swiss Federal Office of Public Health by the Sentinella doctors.

 



  Last update 11.13.2014 28/01/2015

 

 

 

 
Demande d'analyses de routine disponible au laboratoire de virologie
Centre de référence pour les Infections Virales Emergentes (CRIVE)
Centre National de Référence de l'Influenza (CNRI)
Epidémiologie des virus respiratoires
Epidémiologie des gastro-entérites virales
Epidémiologie virale dans les liquides céphalo-rachidiens (LCR)
Réalisation d'un frottis nasopharyngé
Epidémiologie des déclarations des maladies infectieuses (OFSP)