E. coli O157 Infection and Secondary Spread in Scotland
Author Information
Author(s): Locking Mary E., Pollock Kevin G.J., Allison Lesley J., Rae Linda, Hanson Mary F., Cowden John M.
Primary Institution: Health Protection Scotland
Hypothesis
To determine the proportion of Escherichia coli O157 cases in Scotland attributable to secondary spread.
Conclusion
The study found that 11% of E. coli O157 cases were attributed to secondary spread, with younger individuals more likely to be affected in single households.
Supporting Evidence
- Secondary cases constituted 12% of symptomatic cases.
- Child-to-child transmission accounted for 72% of secondary cases.
- Secondary cases were younger than primary cases, with a median age of 13 years.
Takeaway
This study looked at how E. coli O157 spreads in Scotland and found that some cases come from people who got it from someone else in their home, especially kids.
Methodology
Data was analyzed from enhanced surveillance of E. coli O157 cases reported to Health Protection Scotland from 1999 to 2008.
Potential Biases
Potential for bias due to more thorough contact tracing in Scotland compared to other regions.
Limitations
The findings may not be generalizable to other countries due to different surveillance practices.
Participant Demographics
Ages ranged from 4 months to 97 years, with a median age of 21 years.
Statistical Information
P-Value
p<0.0005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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