"With the information we have been provided by the Wyoming Department of Health, in regard to the current positive cases in Natrona County, that has been collected through contact tracing we do not believe there is community spread within Natrona County right now," the Casper-Natrona County Health Department said in an announcement. "Currently, we believe the six positive cases within Natrona County to be part of two epidemiologically traced clusters.

"This means that all Natrona County cases can be tied to two groups of a positive origin."

If the disease has been shared via community spread, it would mean people couldn't trace from whom they got it. In other parts of Wyoming -- notably Teton County, where there's been seven cases -- officials have said there is evidence of community spread.

As of Thursday at noon, there are 53 confirmed cases of COVID-19 in Wyoming, a nearly 100 percent increase in just a few days. Nationally, there have been at least 75,000 cases and more than 1,000 deaths.

Health officials here say the additional positive cases in Natrona County are largely due to an increase in testing. Other have previously said it's difficult to get a true read on the presence of the disease here because of limited testing capabilities.

"This is evidence that social distancing is working," the health department said. "By tracing all new positives back to an identified positive source it provides clear evidence that by restricting events, business and other measures we are flattening the curve in Natrona County."

Photos: Casper restaurants pivot to delivery and takeout