How would you de-fungus a leather case?

[cowanw]

Regarding Thymol
"A minor use is in bookbinding: before rebinding, books with mold damage can be sealed in bags with thymol crystals to kill fungal spores"
sounds hopefull
Might even be useful for the lens as well.

[John Koehrer]

earlier someone mentioned dry cleaning solvents. Most dry cleaners here(US) also do leather cleaning. might be worth a call to a local

[Grytpype]

Might even be useful for the lens as well.

Certainly might be a good way of stopping fungus in its tracks while the gear is awaiting repair time. The fungus would still be there, of course, even if it was dead, so I'd still clean it off.

Thymol looks like the way to go. It seems quite easy to get online from companies supplying bee-keeping materials, and not grossly expensive.