NBCE Exam 2026 – 400 Free Practice Questions to Pass the National Board of Chiropractic Examiners

Pneumocystis is the microbiological genus known for causing opportunistic fungal lung infections, particularly in immunocompromised individuals such as those with AIDS. In patients with HIV/AIDS, the immune system is significantly weakened, making them more susceptible to various infections, including those caused by Pneumocystis jirovecii.

Pneumocystis pneumonia (PCP) is one of the most common opportunistic infections in these patients and can lead to serious respiratory complications if not treated promptly. The recognition of this organism as a significant pathogen is largely due to its unique characteristics and the particular vulnerability of AIDS patients.

While Aspergillus, Candida, and Histoplasma can also cause infections in immunocompromised patients, Pneumocystis specifically has a strong association with AIDS and poses a significant risk in this population, making it the correct answer in the context of the question.