Poor animals

As an animal lover and dog owner, I was so saddened over the Newmarket shelter that has/is euthanizing hundreds of animals due to ringworm.
Animals at Newmarket shelter to be euthanized

I am not a vet so I don't want to make comments that are not based on veterinary information, but I do know that ringworm is a fungal infection that is treatable. Ringworm is also easily transmittable thus I understand possibly hard to contain in a closed environment with many animals. How could this happen?

Giving my miniature schnauzer Molly some love right now.

Nathan