The cases, two confirmed and 25 considered probable, are linked to a recalled, potentially tainted steroid produced by a specialty pharmacy in Massachusetts.
Nationally, more than 400 cases have been reported in 19 states, including 32 deaths.
State health officials say no one in New Jersey has died from the illness. Just seven patients remain hospitalized, and all of those sickened continue to recover.
Two more cases were announced in New Jersey this week. The latest, a 74-year-old woman from Salem County and a 34-year-old woman from Cumberland County, were made public on Friday.