Oregonians have tested positive for a rare strain of Salmonella known as Salmonella overschie, according to the Oregon Health Authority Public Health Division.

The first patient was a 28-year-old Coos County woman who fell ill in December. The second case was a minor in Lane County, which is separated from Coos County by Douglas County.

The two patients developed their symptoms eight days apart. The state health department investigated the possible source of contamination, but couldn’t determine one before ending the investigation.