What's the plural form of oral candidiasis? Here's the word you're looking for.
Answer
The noun oral candidiasis can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be oral candidiasis.
However, in more specific contexts, the plural form can also be oral candidiases e.g. in reference to various types of oral candidiases
or a collection of oral candidiases.