MONTPELIER, Vt. — Vermont officials say 26 migrant workers at a large apple orchard have tested positive for the coronavirus.

The news announced Monday has led to the biggest one-day increase in cases since June in a state that has consistently had one of the lowest infection rates in the U.S.

The apple pickers at Champlain Orchards in Shoreham arrived legally Sept. 14 and were still in a 14-day quarantine when the Health Department learned one of them had tested positive.

Officials say they arrived at New York’s Kennedy Airport and took a bus together to Vermont. Officials say the infected workers were living together and have been isolated.

It wasn’t clear where they were originally from, but Deputy Agriculture Secretary Alyson Eastman notes that many workers who come to Vermont on the type of agriculture visa the infected apple pickers had are from Jamaica. Officials say people who picked apples or visited the farm stand are not at risk.