Final answer:
The infection caused by the transfer of staph bacteria by a healthcare worker to a surgical site is a Healthcare-associated infection (HAI), often involving Staphylococcus epidermidis transmitted via medical devices.
Step-by-step explanation:
The type of infection caused when a healthcare worker transfers staph bacteria from his hands to a surgical site is known as a Healthcare-associated infection (HAI). These infections are contracted as a direct result of medical procedures or treatments, such as during surgery when sterilization and hygiene protocols are not properly followed. Staphylococcus epidermidis is one species frequently associated with nosocomial infections, particularly those transmitted via medical devices inserted into the body. These pathogens are often part of the normal skin microbiota but become harmful when introduced to other parts of the body, such as a surgical site.