Final answer:
Dental patients/ DHCP can be exposed to bacteria, viruses, and fungi, which can cause oral infections and spread.
Step-by-step explanation:
All of the above. Dental patients or DHCP (Dental Healthcare Personnel) can be exposed to pathogenic microorganisms such as bacteria, viruses, and fungi. These microorganisms can cause oral infections and spread to other parts of the body. For example, bacteria like Streptococcus mutans can contribute to dental caries or tooth decay, and viruses like herpes simplex virus can lead to oral herpes.