By Kate Ward
Updated May 13, 2011 at 03:52 PM EDT

Etta James, the blues singer best known for her rendition of “At Last,” has checked back into the hospital with an infection that could be deadly, the Associated Press reports. The 73-year-old singer, who has been battling leukemia and suffered another infection that required hospitalization last year, is being treated for a sepsis caused by a urinary tract infection. This is the latest setback for the singer’s health: James’ struggle with dementia has also recently been revealed.

Read more:

Etta James revealed to have leukemia and dementia

Etta James hospitalized