Inspectors have found Listeria monocytogenes in raw milk from a Pennsylvania dairy, prompting Pennsylvania officials to urge consumers to immediately discard any of the unpasteurized milk bought recently.

Routine state testing revealed the bacterial contamination in raw milk from Fertile Valley Farm of Honesdale, PA. The Wayne County dairy posted a notice about the contamination on social media, according to the March 2 public warning from the Pennsylvania Department of Agriculture.

The dairy operators sold the implicated unpasteurized milk directly from their farm between Feb. 21 and March 1. Fertile Valley Farm raw milk purchased between those dates should immediately be thrown away. Any containers or storage areas, such as refrigerators, should be throughly washed and sanitized.

“Milk was sold directly from the farm in plastic gallon, half gallon, and quart containers with the Fertile Valley Farm label. The farm has discarded all remaining milk,” the state agriculture department reported.

“No reported illnesses have been attributed to the product, but anyone who consumed the milk and become ill should consult their physician.”

Anyone who drank the milk — or served it to children or others — should monitor themselves for listeriosis symptoms for 70 days after consuming the unpasteurized milk. They should also urge those they served the milk to watch for symptoms.

“Listeriosis symptoms include fever, muscle aches, nausea and diarrhea,” according to the agriculture department notice. “The illness mainly affects pregnant women, newborns, the elderly and adults with impaired immune systems. It can result in miscarriage, premature delivery, serious infection or stillbirth, if a pregnant woman became infected.”

The U.S. Centers for Disease Control and Prevention also has a standing warning about the dangers of contracting infections, viruses and parasites from raw milk. In addition to those listed by the Pennsylvania officials, the CDC reports its data shows that children younger than 5 are a high-risk group because their immune systems are not fully developed.