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Human listeriosis in France in 1987
Abstract:
The surveillance of human listeriosis is based in France on laboratories' reports. From 1983 to 1986 the trend showed a steady increase of the number of cases reported. The highest annual incidence rate was observed in 1986 with 14.7 cases/million population. In 1987 less cases have been reported; about half of the human strains were typed by the National Reference Centre of Listeriosis showing that 62% were 4b, 22% were 1/2a and 13% were 1/2b. Since 1988, the surveillance of listeriosis is computerized using a system of minicomputer terminals (called Minitel) linked via a national telephone network to a large computer. The 70 microbiologists involved in this surveillance must send, on a 24 h basis, data as a soon as they have a new isolate of Listeria monocytogenes in their laboratories. An investigation (typing of the strains, case-control study) is made for each cluster detected.
Insights
Human listeriosis surveillance in France increased until 1986. A computerized system implemented in 1988 improved data collection for Listeria monocytogenes isolates.
Area of Science:
- Microbiology
- Epidemiology
- Public Health
Background:
- Human listeriosis surveillance in France historically relied on laboratory reports.
- A notable increase in reported cases was observed from 1983 to 1986, peaking in 1986.
Purpose of the Study:
- To describe the trends and characteristics of human listeriosis in France.
- To detail the implementation of a computerized surveillance system for improved data management.
Main Methods:
- Analysis of reported laboratory cases of human listeriosis.
- Strain typing by the National Reference Centre of Listeriosis.
- Implementation of a computerized surveillance system using Minitel terminals since 1988.
Main Results:
- The highest incidence rate was 14.7 cases/million population in 1986.
- In 1987, reported cases decreased, with common serotypes being 4b (62%), 1/2a (22%), and 1/2b (13%).
- The computerized system facilitates rapid data submission from 70 microbiologists.
Conclusions:
- The introduction of a computerized surveillance system enhanced the ability to monitor Listeria monocytogenes outbreaks.
- Continuous monitoring and rapid data analysis are crucial for public health interventions against listeriosis.