A nurse is assisting an infection control nurse teach a class about transmission of infectious agents. The nurse should include that which of the following diseases is transmitted via airborne transmission?(Select All that Apply.)

A. While water temperature can be a matter of personal preference, it is not necessary to use hot water. In fact, the temperature of the water (whether warm or cold) does not significantly impact the effectiveness of handwashing. The most important factor is to use soap and rub the hands thoroughly for at least 20 seconds.
B. This statement is partially correct but requires clarification. Alcohol-based hand sanitizers should be rubbed on all surfaces of the hands until they are dry, which typically takes about 20 seconds. Ten seconds is insufficient for effective sanitization, so this instruction should be revised.
C. This statement is correct and should definitely be included. When hands are visibly soiled, washing them with soap and water is the most effective way to remove dirt, bacteria, and viruses. Alcohol-based hand sanitizers are not effective when hands are dirty or greasy.
D. Clostridium difficile (C. diff) infections require soap and water for handwashing, as alcohol-based hand sanitizers are ineffective against the spores of C. diff. Therefore, this instruction should not be included.

A. The reservoir is the natural habitat of the infectious agent where it lives, grows, and multiplies. In the case of hepatitis A, the reservoir could be contaminated food, water, or infected individuals. The mouth is not the reservoir; rather, it is a route through which the infection enters the body.
B. The infectious agent is the pathogen (bacteria, virus, or other microorganisms) that causes the disease. For hepatitis A, the infectious agent is the hepatitis A virus itself. The mouth is not the infectious agent; it's the entry point for the virus.
C. A susceptible host is an individual who is at risk of infection due to factors such as weakened immunity, age, or underlying health conditions. The client with hepatitis A is a susceptible host, but the mouth is not categorized as such.
D. The portal of entry is the way an infectious agent enters a susceptible host. In the case of hepatitis A acquired through contaminated food, the mouth serves as the portal of entry. The virus enters the body when the contaminated food is ingested.