Most of the new cases found between mid-January and late February were in California - about 44 cases. Arizona followed with three cases, Utah with two cases and Hawaii and Tennessee with one new case.
The spike runs contrary to the agency's Jan. 16 statement, which reported that new cases were declining and the outbreak was near its end.
More than 480 people from 25 states and Puerto Rico have been affected since the outbreak began in March 2013. About 13 percent of those ill have developed blood infections as a result.
No deaths have been reported.
In October 2013, the U.S. Department of Agriculture issued a health alert because of salmonella concerns at three Foster Farms facilities in California. Those facilities stayed open.
To avoid infection, food safety experts say to wash your hands with soap and warm water before and after handling raw chicken.
Chicken should be cooked to 165 degrees to kill bacteria.
