How to pronounce“pyrogens”in English

Many years ago, in my undergraduate years, I was working on pyrogens, injecting something called lipopolysaccharide

that pyrogen, it's sometimes called, a pyrogen is a substance that causes fever, think pyro, think fire, think pyromaniacs, think pyro,

So, in biology, we like complicated words, so we call anything that increases body temperature or creates a fever, a pyrogen.