Final answer:
Aspergillus is the most common oral fungal species after Candida.
Step-by-step explanation:
The most common oral fungal species after Candida is Aspergillus. Candida is the most common fungal species associated with oral infections, especially oral thrush. However, if Candida overgrowths are successfully treated or controlled, Aspergillus is the next most common oral fungal species that can cause infections.