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2008 Salmonella Saintpaul National Outbreak Updates
Summary of Outbreak (MMWR Article):
Outbreak of Salmonella Serotype Saintpaul Infections Associated with
Multiple Raw Produce Items --- United States, 2008
http://www.cdc.gov/salmonella/saintpaul/
http://www.fda.gov/oc/opacom/hottopics/tomatoes.html
For general information on salmonellosis go to:
http://www.cdc.gov/nczved/dfbmd/disease_listing/salmonellosis_gi.html
2008 Williamson County Salmonellosis Statistics
Although there is no question that Williamson County experienced an
outbreak of Salmonella Saintpaul, it is important to note that reporting
for all Salmonella usually improves during outbreaks due to the
heightened awareness produced by media coverage and the public health
response. With increased publicity and awareness, individuals are more
likely to visit a health care provider and health care providers may be
more likely to order diagnostic laboratory testing that allows the
specific bacteria to be identified.
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Hospitalizations:
2008 Williamson County hospitalizations due to salmonellosis= 1 |
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Gender of 2008 Williamson County
Salmonellosis Cases (as of 12/2/08) |
| Gender |
% Cases
non-Saintpaul
(case count) |
% Cases
Saintpaul
(case count) |
| Female |
48.4% (44/91) |
63.6% (7/11) |
| Male |
51.6% (47/91) |
36.4% (4/11) |
| Age of 2008 Williamson County Salmonellosis
Cases (as of 12/2/08) |
Age Range
(Years) |
% Cases
non-Saintpaul
(case count) |
% Cases
Saintpaul
(case count) |
| <1 |
14.3% (13/91) |
9.1% (1/11) |
| 1 - 4 |
22.0% (20/91) |
0% (0/11) |
| 5 - 14 |
14.3% (13/91) |
0% (0/11) |
| 15 - 24 |
4.4% (4/91) |
18.2% (2/11) |
| 25 - 39 |
11.0% (10/91) |
27.3% (3/11) |
| 40-64 |
22.0% (20/91) |
36.3% (4/11) |
| >64 |
12.0% (11/91) |
9.1% (1/11) |
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Williamson County 2008 Salmonellosis Cases by Area
(as of 12/2/08) |
| Area* |
# of Salmonellosis Cases
(non-Saintpaul)
|
# of Salmonellosis Cases
(Saintpaul) |
| Round Rock |
28 |
6 |
| Cedar Park |
10 |
1 |
| Georgetown |
19 |
1 |
| Austin** |
6 |
0 |
| Taylor |
6 |
0 |
| Jarrell |
1 |
0 |
| Florence |
1 |
0 |
| Leander |
9 |
2 |
| Liberty Hill |
2 |
1 |
| Hutto |
9 |
0 |
| TOTAL |
91 |
11 |
*Areas defined by one or more zip code
boundaries. Parts of zip codes located outside Williamson County are
excluded.
**Includes only cases within WCCHD’s jurisdiction
In addition to the 11 isolates identified as St Paul serotype, the following serotypes were reported for 12 additional isolates: Newport (3), Typhimurium (2), Infantis (2), Oranienburg (1), Muenchen (1), Javiana (1), Braenderup (1), and Montevideo (1).
Epidemic Curve (Epi Curve)
The epidemic curve (epi curve) shows progression of an outbreak over time. The horizontal axis represents the date when a person became ill, also called the date of onset. The vertical axis is the number of persons who became ill on each date. The epi curve is updated as new data come in. Epi curves are complex and may be incomplete. Consider the following issues when interpreting epi curves:
- There is an inherent delay between the date that an illness starts, and the date that the case is reported to public health authorities.
- For most conditions, some background cases of illness are likely to occur that would have occurred even without an outbreak. This makes it difficult to say exactly which case is the first case in an outbreak.
- For some cases, the date when they became ill is not known.
- It can be difficult to determine when cases start to decline because of the reporting delay. This can become clearer as time passes.
- It can be difficult to say when an outbreak is over, because of the reporting delay.
Additional Salmonellosis Charts
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