A 29-year-old Michigan chef died last week after battling a rare fungal disease that ravaged his lungs.

Sometime before Thanksgiving, Ian Pritchard contracted blastomycosis, a fungus-borne illness that targeted and wore out his respiratory system.

“They showed us a picture of his lungs, and they literally looked like Swiss cheese,” his father, Ron Pritchard, told UpNorthLive in December.