People undergo specific anti fungal protocols and kill off fungal colonies. As they die they release acrid odor. Herxheimer reactions are experienced in conjunciton with their passing. They look, feel, and hold together like fungal colonies.
So they are obviously fungal colonies.
I don't know what is going on in your head when you describe candida as "microscopic" in an attempt to debunk the fact that what is being released are fungal colonies. Do you know what a colony is? How about an organism? Do you know that your body is made up of 60-75 trillion 'microscopic cells'? Really man, this is NOT rocket science.