Excessive checking for non-anxiogenic stimuli in obsessive-compulsive disorder.

BACKGROUND: Repetitive checking in obsessive-compulsive disorder (OCD) would serve to relieve obsession-related anxiety and/or to compensate memory deficit, but experimental literature on this subject is inconsistent. The main objective is to test the influence of obsession-related anxiety and memory on repetitive checking in OCD. METHODS: Twenty-three OCD checkers, 17 OCD non-checkers and 41 controls performed a delayed-matching-to-sample task with an unrestricted checking option. Some stimuli were obsession-related in order to measure the influence of anxiety on checking. A version of the task without checking possibility was used to assess memory abilities. RESULTS: OCD checkers had similar memory performances but checked more than the other groups when presented with non-anxiogenic stimuli. Level of anxiety associated to the stimulus did not influence the number of checks. CONCLUSIONS: Increased checking in OCD checkers, being independent of memory abilities and primary obsession-related anxiety, would, therefore, be closer to an automated behaviour than a coping strategy.

Automated early warning system for the surveillance of Salmonella isolated in the agro-food chain in France.

Non-typhic Salmonella is one of the major bacterial pathogens that cause foodborne infections as well as economic losses for the food production industry. There is therefore a need to improve early detection to prevent the emergence and spread of Salmonella within the agro-food chain. The passive laboratory-based surveillance system of the Salmonella network has been integrated into the French Food Safety Agency's working plan. The objective of this study was to evaluate the ability of this network to detect unusual Salmonella contamination as early as possible in the agro-food chain. Three statistical methods were used to detect unusual events from the time-series of counts. After an experimental period of more than 1 year, this approach detected several unusual events linked to contamination in the agro-food chain that were confirmed in a timely manner at national or regional levels. This evaluation also reinforced the position of the Salmonella network as an integral part of the national public health surveillance system.