Foodborne botulism cases in the United States, 1990–2000.
From 1990 to 2000, 160 foodborne botulism events affected 263 people in the United States,
an annual incidence of 0.1 per million. No discernable trend was evident in the overall or toxin type–specific annual case counts (Figure). The median number of cases per year was 23 (range 17–43), the median number of events per year was 14 (range 9–24), and the median number of cases per event was 1 (range 1–17). The highest incidence rates were in Alaska, Idaho, and Washington (Table 1). One hundred and thirty-one cases (50%) were caused by toxin type A, 27 (10%) by toxin type B, and 97 (37%) by toxin type E (Table 2). Among case-patients for whom data were available, 67 (26%) persons were intubated. Forty-one (84%) persons with type A intoxication were intubated, compared with 6 (33%) persons with type B and 17 (33%) of those with type E. For case-patients with available data,
7 persons (5%) with type A intoxication died, compared with 1 (4%) with type B and 3 (3%) with type E.
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_http://www.wedlinydomowe.com/sausage-making/meat-safety/botulism
Experts estimate that up to 90% of U.S. food-borne botulism cases can be traced to eating contaminated home-preserved food. Between 1975-1992, 543 people fell victim to food-borne botulism in the United States and Puerto Rico. In the early 1900s, 71% of botulism victims died, but with early diagnosis and advanced treatment, the fatality rate had dropped to 7.5 % by 1984 and fewer than 2% by 1993.
In the United States, an average of 110 cases of botulism are reported every year. Approximately 25% are food borne, 72% are infant botulism, and the rest are wound botulism. Outbreaks of food borne botulism involving two or more persons are the most frequent, and are usually caused by eating contaminated home-canned foods. The number of cases of foodborne and infant botulism has changed little in recent years, but wound botulism has increased because of the wide spread use of drugs.