Final answer:
The transmission of a disease through contact with an infected person's saliva is considered direct transmission, as it involves a direct exchange of pathogens.
Step-by-step explanation:
Transmission of a disease via contact with an infected person's saliva is an example of direct transmission. This mode of transmission occurs when pathogens spread from one person to another without the need for an intermediary object or vector. Sharing utensils, kissing, or exposure to saliva through other means can lead to direct transmission of diseases such as mononucleosis and oral herpes.