November 13, 2025
One additional Washington resident has been added to this outbreak, bringing the total to 10 cases – 9 Washington residents and 1 Oregon resident. All cases report illness onsets before the cheese was recalled on October 24, 2025.
November 6, 2025
Samples of Twin Sisters Creamery cheese have tested positive for two different STEC strains associated with human cases: E. coli O103 and E. coli O26.
Two Washington residents and one Oregon resident have been infected with E. coli O103. Molecular fingerprinting of the E. coli O103 bacteria from the three cases is extremely similar to the E. coli O103 identified in both the Twin Sisters Creamery Farmhouse and Whatcom Blue cheeses.
Six Washington residents have been infected with E. coli O26. Molecular fingerprinting of the E. coli O26 bacteria from the six cases is extremely similar to the E. coli O26 bacteria identified in the Twin Sister’s Creamery Peppercorn Farmhouse cheese.
| Twin Sisters Creamery brand cheese sample | Where Collected | Where Tested | Shiga |
|---|---|---|---|
| Farmhouse variety (opened) | Case’s Home | Commercial Lab | E. coli O103 |
| Whatcom Blue variety | Retail Store | Washington State Department of Agriculture | E. coli O103 |
| Peppercorn Farmhouse variety (unopened) | Case’s Home | Food and Drug Administration | E. coli O26 |
| Farmhouse variety | Retail Store | Washington State Public Health Lab | E. coli NOS* |
*NOS: Not otherwise specified–this strain of Shiga toxin E. coli is not typeable at the Washington State Public Health Lab