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Volume 9, Number 11—November 2003
Research

Human Hantavirus Infections, Sweden

Gert E. Olsson*†Comments to Author , Fredrik Dalerum*1, Birger Hörnfeldt†, Fredrik Elgh†, Thomas R. Palo*2, Per Juto†, and Clas Ahlm†
Author affiliations: *Swedish University of Agricultural Sciences, Umeå, Sweden; †Umeå University, Umeå, Sweden; 1Present address: Stockholm University, Stockholm, Sweden.; 2Present address: Mid Sweden University, Sundsvall, Sweden.

Main Article

Table

Quarterly incidence a of nephropathia epidemica per year and county, and autumn trapping indices b of bank voles

Counties and populations
Incidence of reported nephropathia epidemica cases
Season 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
Norrbotten
 Jan–March
 10.20
 7.89
 14.60
 0.75
 6.01
 9.08
 2.67
 15.74
 23.25
 1.17
 11.38
     Inhabitants: 263.891
     Inhabitants/km2: 3c
 April–June
 5.66
 5.26
 0.00
 0.75
 1.13
 4.92
 3.81
 18.43
 5.42
 3.12
 1.57
July–Sept
 1.51
 4.51
 4.12
 0.75
 3.01
 8.32
 1.52
 13.44
 1.16
 1.17
 7.46
Oct–Dec
 10.57
 12.03
 0.75
 4.11
 8.27
 7.57
 9.15
 19.20
 2.32
 10.93
 12.95
Västerbotten
 Jan–March
 12.21
 8.98
 12.01
 2.69
 7.68
 5.00
 4.63
 10.09
 35.84
 4.30
 9.81
     Inhabitants: 257.860
     Inhabitants/km2: 5
 April–June
 1.97
 1.95
 3.10
 1.92
 3.46
 3.46
 3.86
 13.96
 13.24
 3.52
 8.63
July–Sept
 8.27
 8.98
 1.94
 3.85
 12.29
 9.62
 3.86
 18.23
 3.51
 3.91
 5.49
Oct–Dec
 11.03
 7.03
 3.10
 8.47
 10.37
 3.85
 8.49
 30.26
 6.23
 9.39
 10.60
Västernorrland
 Jan–March
 4.98
 3.07
 6.91
 1.15
 17.04
 2.34
 2.36
 7.54
 16.04
 0.41
 8.98
     Inhabitants: 256.777
     Inhabitants/km2: 11
 April–June
 1.53
 0.77
 1.54
 2.69
 2.71
 0.78
 1.57
 7.94
 8.02
 0.00
 5.71
July–Sept
 0.77
 2.68
 0.38
 4.61
 4.26
 1.95
 1.18
 16.28
 2.81
 2.03
 9.38
Oct–Dec
 4.21
 4.60
 1.92
 8.07
 4.65
 3.12
 4.32
 30.57
 1.60
 10.53
 17.55
Jämtland
 Jan–-March
 1.47
 3.68
 3.67
 2.20
 1.48
 3.72
 0.75
 2.28
 3.06
 0.00
 2.33
     Inhabitants: 134.324
     Inhabitants/km2: 3
 April–June
 0.74
 0.74
 0.73
 0.00
 0.00
 0.74
 0.75
 0.76
 2.30
 0.00
 0.78
July–Sept
 0.00
 2.21
 0.73
 1.47
 2.95
 0.00
 0.00
 8.35
 0.77
 0.77
 3.89
No. bank voles / 100 nightsd Oct–Dec 8.09 2.21 1.47 5.87 5.16 2.23 5.26 14.42 1.53 5.40 7.00

aNo. of reported nephropathia epidemica cases per 100.000 inhabitants.
bNo. of bank voles trapped per 100 trapnights.
cAverage population density 1991–2001 from census.
dBank vole trapping indices from Västerbotten.

Main Article

Page created: January 24, 2011
Page updated: January 24, 2011
Page reviewed: January 24, 2011
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