WELLINGTON, New Zealand (AP) — A New Zealand meat company has recalled several of its products after tests showed a possible link to a listeria outbreak that left two patients dead at a hospital in the island nation.

Bay Cuisine, which supplies the hospital, voluntarily recalled certain salami, pepperoni and ham products Wednesday, according to the Ministry for Primary Industries. New Zealand markets that sell the Napier-based company’s products have pulled them from the shelves.

A company representative declined to comment but said Bay Cuisine would issue a statement later Thursday.

Four patients at Hawke’s Bay Hospital have been diagnosed with the bacterial disease since May 9, spokeswoman Anna Kirk said.

She said listeria likely caused the death of one woman and was a contributing factor in the death of a second. One woman who died was in her 80s, the other in her 60s, and both had weakened immune systems, Kirk said. The other two people diagnosed have since recovered, she added.

Kirk said the hospital at first wasn’t able to identify the source of the listeria but then found that some supplied meats tested positive.

According to the Mayo Clinic, listeria is a foodborne illness that is especially dangerous to pregnant women, newborn babies and those with compromised immune systems. It rarely causes serious illness in healthy people and can be treated with antibiotics. Symptoms include fever, muscle aches, nausea and diarrhea.