Figure. Infectious periods and work schedules for 4 multidrug-resistant tuberculosis–infected seafood production workers (AK1, CA1, CA4, and WA1) with matching mycobacterial genotypes, Alaska, USA, 2005–2008. Green, infectious period; orange, work at processing facility A; gray, work at another processing facility; red box, likely period of transmission. DX, date of diagnosis. *Approximate time periods.