Montana ? Anthrax has killed 37 cattle on a northeast Montana ranch now under quarantine, the state veterinarian said Thursday.

Anthrax was last confirmed in the state in 1999, the Department of Livestock said. But hundreds of cases have been reported this year in neighboring North Dakota and South Dakota.

The Montana ranch, northwest of Culbertson, was placed under quarantine Monday on suspicion of anthrax, later confirmed.

Hundreds of remaining cattle were moved to a different pasture, state veterinarian Tom Linfield said.

The Montana Department of Public Health and Human Services said the disease poses “little threat” to humans.