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American Journal of Public Health, Vol. 83, Issue 12 1694-1700, Copyright © 1993 by American Public Health Association

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Salmonella enteritidis infections in France and the United States: characterization by a deterministic model.

L Watier, S Richardson and B Hubert

Institut National de la Santé et de la Recherche Médicale, Villejuif, France.

OBJECTIVES. Epidemiological surveillance can be used to identify problems, suggest hypotheses, and assess the effectiveness of preventive actions. These objectives are pursued in the analysis of the dynamic evolution of Salmonella enteritidis infections. In this analysis, development of the epidemic in France and the United States is compared. METHODS. This analysis is based on the formulation of a simple deterministic compartmental model, in which human contact with contaminated food is expressed in terms of a baseline transmission rate. RESULTS. In France, the baseline transmission rate, stable up until 1986, is multiplied by 2.3 in 1987 and by 4.1 in 1988. There is no evidence of a slowdown of the linear rate of increase. In the Middle Atlantic region of the United States, the linear increase of the epidemic is similar to that observed in France. From 1990 a potential effect of the preventive measures is observed. CONCLUSIONS. The pattern of increase of the baseline transmission rate is similar in France and in the Middle Atlantic region of the United States. However, preventive measures, used in both areas, appeared more effective in the United States.


Related articles in AJPH:

Salmonella enteritidis infections in France and the United States: causes vs causal models.
M E Halloran
AJPH 1993 83: 1667-1669. [PDF]  





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Copyright © 1993 by the American Public Health Association