Tarrant County Public Health issued a warning Monday about an outbreak of Cyclosporiasis.

Prior to this month, there were just eight cases reported in the State of Texas, and Tarrant County had seen just one.

But there are now 69 Cyclosporiasis cases in Texas, nine of them in Tarrant County.

So far, health officials have not found the source of the outbreak. They are asking health care providers to test patients who have intestinal issues lasting more than a few days.

Tarrant County Public Health says past outbreaks in the U.S. have been linked to imported fresh produce, including fresh cilantro, pre-packaged salad mix, raspberries, basil, snow peas, and mesclun lettuce.