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Today in History: Osho followers unleash largest Salmonella attack in Oregon

8/29/2026

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Summary

Story summary

On August 29 1984, Osho disciples led by Ma Anand Sheela laced salad bars in ten The Dalles, Oregon restaurants with Salmonella, sickening 751 diners. The plot aimed to disable voters and secure Rajneesh-movement candidates in Wasco County elections, marking the United States’ first and largest bioterrorist attack.

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Story summary

On August 29 1984, Osho disciples led by Ma Anand Sheela laced salad bars in ten The Dalles, Oregon restaurants with Salmonella, sickening 751 diners. The plot aimed to disable voters and secure Rajneesh-movement candidates in Wasco County elections, marking the United States’ first and largest bioterrorist attack.