Thomson said on Saturday that it recalled red, yellow, white and sweet onions that were shipped since May 1 because of the risk of contamination.
Onions were distributed to wholesalers, restaurants and retail stores across the country and into Canada, Thomson said. They were also distributed into mesh sacks and cartons under the names TII Premium, El Competitor, Hartley, Onions 52, Imperial Fresh, Utah Onions and Food Lion.
Health officials recommend that consumers throw away any onions or foods made with onions supplied by Thomson, and into general throw away onions if they were unsure of where they came from.
The illness, named salmonellosis, can persist for four to seven days, the agency said. Children, older adults and people with weaker immune systems are most at risk to develop severe illness.
Symptoms include diarrhea, fever and abdominal cramps. Those who are severely ill may also experience a high fever, headaches or a rash.