A historic bird flu outbreak that has devastated the U.S. poultry industry and caused egg prices to spike has Tennessee farmers and agricultural officials on alert.

Egg prices are projected to reach record highs in 2015 as the nation’s worst outbreak of avian flu has resulted in the death of more than 47 million birds since December, according to data released Wednesday by the United States Department of Agriculture.

The outbreak was first reported in Oregon and quickly spread to some of the largest egg-producing states, including Iowa and Minnesota. The disease has mostly affected egg-laying hens at barns that house birds in very high densities.

This strain of the virus has not caused human illness, and the Centers for Disease Control and Prevention considers the risk to people to be low, although it issued a warning to health officials to watch for human infections from the bird flu.

The loss of millions of chickens has triggered an egg shortage in some states, resulting in price increases for wholesale buyers and consumers.

Tennessee’s poultry farms have not been infected with the disease.

The state’s poultry industry is predominately comprised of breeder companies. There are also broiler operations in Tennessee for meat production, but there aren’t any large-scale commercial egg producers, said Corinne Gould, director of communications for the Tennessee Department of Agriculture.

“At this point, we have not seen an impact here. … However, we are closely monitoring the situation,” Gould said.

Where consumers will likely see an impact is at grocery stores nationwide, where the cost of eggs has jumped. A report released Wednesday by the USDA predicts the price of eggs will reach new highs by the fourth quarter of 2015 at an average of $1.73 to $1.87 per dozen, up from $1.63 a year prior.

Some U.S. supermarkets are charging $3 for a carton of eggs. Texas supermarket chain H-E-B made headlines last week when it posted signs asking customers to limit their purchases to three cartons of eggs per purchase.

Nashville Kroger spokeswoman Melissa Eads said the company’s local stores have not experienced a shortage of shell eggs. She said the company has a diverse list of egg suppliers.

A carton of large eggs at a Nashville-area Kroger store was priced $1.99 Wednesday afternoon. A dozen large eggs at a local Publix was $2.97.

“Kroger is working closely with suppliers to mitigate the impact on the availability of product and prices,” Eads said in an email.

Customers shouldn’t notice bird flu-related price jumps for eggs at smaller Nashville grocers, including Turnip Truck and Produce Place, since those stores source from local or organic farmers.

Produce Place employee Eric Morrison said the store stocks eggs from Willow Farms, which cost $4.99 per dozen.