Volume 18, Number 9—September 2012
Dispatch
Yersinia enterocolitica Outbreak Associated with Ready-to-Eat Salad Mix, Norway, 2011
Figure 2

Figure 2. . Week of symptom onset or positive test result for 21 persons with Yersinia enterocolitica O:9 infection, Norway, 2011. Dark gray, date of symptom onset for 17 case-patients; light gray, date of positive test result for 4 case-patients for whom the date of symptom onset was not available.