A client with a diagnosis of Human Immunodeficiency Virus develops pneumonia. What type of infection is this?
Correct Answer: A
Rationale: The correct answer is A: An opportunistic infection. In patients with Human Immunodeficiency Virus (HIV), infections like pneumonia are considered opportunistic because they take advantage of a weakened immune system. Option B, root cause infection, is incorrect as it does not describe the nature of the infection in relation to the patient's condition. Option C, pathogenic infection, is incorrect because while pneumonia is caused by pathogens, in the context of HIV, it is specifically termed as an opportunistic infection. Option D, nosocomial infection, is also incorrect as it refers to infections acquired in a healthcare setting, not related to the patient's HIV status.