--- title: Hartmann Farm Dairy Raw Milk E. coli Outbreak date: 2010-06-11T20:34:38-07:00 author: Bill Marler canonical_url: "https://marlerclark.com/news_events/e-coli-o157h7-outbreak-tied-to-raw-milk-from-hartmann-farm-dairy-in-minnes" section: News --- [All News](/news_events) / [Outbreaks](https://marlerclark.com/news_events/outbreaks) / # Hartmann Farm Dairy Raw Milk E. coli Outbreak Hartmann Farm Dairy in Gibbon Minnesota has been identified by the Minnesota Department of Health as the source of an outbreak of *E. coli* O157:H7. At least 8 people have been infected with the extremely dangerous strain of *E. coli,* which can cause serious illness, especially in the young, elderly, and immune-compromised. Field investigators collected environmental samples from the farm, and testing of the samples yielded *E. coli* with a matching[ DNA "fingerprint"](http://www.marlerblog.com/case-news/minnesota-department-of-health-responds-to-hartmann-dairy-on-the-raw-milk-e-coli-o157h7-outbreak/ "DNA "fingerprint"") to the strain identified in the outbreak. No information is yet available on the status of the victims, or if any have developed the potentially life-threatening complication of *E. coli* infection, [hemolytic uremic syndrome (HUS).](http://www.about-hus.com "hemolytic uremic syndrome (HUS).") Anyone who purchased or consumed raw milk from the Hartmann Dairy Farm is encouraged to visit their health care practitioner to be tested for *E. coli.* Testing is done from a stool sample, and may reveal infection before symptoms have presented themselves. *E. coli* has an incubation period, meaning that it may be present without any symptoms of illness. The incubation period is usually 2-5 days, but can range anywhere from 1-10 days. Raw milk is a very controversial product, as it is not pasteurized, a process that kills illness-causing bacteria. 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