Volume 9, Number 11—November 2003
Research
Human Hantavirus Infections, Sweden
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.