contact with pigs or pork was reported for 15.5% of singlecases but for 33.9% (95% CI 21.1%–49.5%) in the metaanalysis. History of eating meals containing pork was reported mainly in Asia (Thailand and Vietnam); the pooledestimate was 37.3% (95% CI 20.2%–58.3%). For Thailandonly, the proportion was 55.8% (95% CI 33.7%–75.9%). Inother countries, only 1 patient in France was reported eating artisanal dry sausage (22), and 1 patient in the United