The producer price index for final demand climbed 0.4% from a month earlier, and that after an upwardly revised 0.5% increase in December, the Bureau of Labor Statistics said Thursday. The data on wholesale prices comes just a day after a consumer price index report showed underlying inflation at its highest in more than a year.

The index that tracks food was up 4 percent, led in part by a 6.6 percent increase in the category that includes meats, poultry, fish and eggs. Egg prices across the country are skyrocketing because of a bird flu outbreak. Nationally, egg prices jumped 15 percent from December to January.