Surveillance of Vero Cytotoxin-Producing E. coli O157 in Wales (1990-1998)
Author Information
Author(s): Rachel M. Chalmers, Sharon M. Parry, Roland L. Salmon, Robert M.M. Smith, Geraldine A. Willshaw, Tom Cheasty
Primary Institution: Public Health Laboratory Service Communicable Disease Surveillance Centre, Cardiff, United Kingdom
Conclusion
The incidence of VTEC O157 in Wales has remained stable over the years, with a mean of 1.6 cases per 100,000 population.
Supporting Evidence
- From 1990 through 1998, 415 cases of VTEC O157 were reported in Wales.
- The annual incidence remained stable at a mean of 1.6 cases per 100,000 population.
- 49.9% of the patients were males, and the highest incidence was in children younger than 5 years.
- Diarrhea was reported in 81.7% of cases, with 46.3% having blood in the stool.
- 17.8% of cases were part of outbreaks, while 82.2% were sporadic.
- Only one death was reported during the study period due to the infection.
Takeaway
This study looked at how many people got sick from a specific germ in Wales over 9 years, and it found that the number of cases stayed about the same each year.
Methodology
Population-based surveillance was conducted, testing all first-time acute-phase fecal specimens for VTEC O157.
Limitations
The study may not capture all cases as it relies on laboratory submissions and may miss asymptomatic cases.
Participant Demographics
Participants included 415 patients aged 3 months to 89 years, with a mean age of 25 years, and the highest incidence was in children under 5 years.
Statistical Information
Confidence Interval
95% CI calculated for various age-specific rates and symptoms.
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