Final answer:
A client with HIV developing pneumonia would be an opportunistic infection.
Step-by-step explanation:
The type of infection that a client with a diagnosis of human immunodeficiency virus (HIV) develops pneumonia is opportunistic.
Opportunistic diseases are ones that rarely occur except in people with a compromised immune system, such as those infected with HIV. These infections take advantage of the weakened immune system to cause illness.
In the case of a client with HIV developing pneumonia, the pneumonia is considered an opportunistic infection because it would not typically occur in an individual with a healthy immune system.