CHARLOTTESVILLE, VA (CVILLE RIGHT NOW) – The Virginia Department of Health (VDH) has announced that recent water testing from Lake Anna has cleared concerns about Shiga toxin-producing Escherichia coli (STEC) O157. The latest results did not detect the presence of the harmful bacteria.

This update follows an E. coli outbreak over Memorial Day weekend, which caused severe gastrointestinal symptoms in numerous people, primarily children. Symptoms included severe stomach cramps, diarrhea, vomiting, fever, and chills, with a risk of organ damage in severe cases. The VDH investigation into the outbreak revealed that all affected individuals had water exposure at Lake Anna, prompting ongoing water tests to ensure public safety.

Escherichia coli (abbreviated as E. coli) are a large and diverse group of bacteria, most of which are harmless. However, E. coli O157 can produce Shiga toxin, causing severe diarrhea and other serious health issues.

Additional fecal bacteria results from the water samples did not show levels that typically rise to public health concern. Dr. Olugbenga O. Obasanjo, Health Director for the Rappahannock Health District, emphasized that the investigation into the exact source of the outbreak is ongoing, but current water tests indicate it is now safe for recreational activities.

However, VDH reminds the public that the upper section of North Anna Branch of Lake Anna in Louisa County remains under a swimming advisory due to harmful algal blooms (HABs) not related to the STEC outbreak.

Health officials say visitors are encouraged to enjoy the lake while adhering to this advisory.