Jahresbericht - Gesundheitsserver - Land Steiermark

Fig. 2: The epidemic curve of the nursing home cluster suggests a point source spread between Nov. 10 -11 (including 16 cases)
following the vomiting episode of the index case on Nov. 9, and a spread by direct person-to-person transmission or exposure to
contaminated environment from November 12-17 (generating another 8 cases).
cases among the nursing home residents
cases among the nursing home residents hospitalised
cases among the nursing home staff
Spread by direct airborn transmission
from a point source:
16
15
vomitus of the index case
14
specific hygienic measures set
13 12
12
11
10
9
8
7
6
Vomiting
of index case
in dining room
Spread by person-to-person transmision
5 soure case visiting 4
4 the index case
3
3 2
2 1 1 1 1
1
date 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
November
days of outbreak 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Fig. 3: Epidemic curve of the cluster at the Hospital department by clinical onset of hospital cases (n=28), November 11 - 28, 2004;
and the 8 cases referred from the nursing home by day of admission at that department; ICP: Infection Control Practitioner
cases among the nursing home residents hospitalised at the Internal Medicine Department; n=8
by date of admission (source cases)
cases among the hospital patients by clinical onset; n=10
cases among the Hospital Department staff by clinical onset; n=18
12
Detection of NVL-virus in stool samples
11
Result immediately reported to the ICP
10
9
8
7 6 6
6
specific hygienic measures set
5 4
4 3 3
3 2 2 2 2 2
2 1 1 1 1 1
1
date 9101112131415161718192021222324252627282930 November
days of outbreak 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
37