time course of opportunistic diseases in patients with human immunodeficiency virus (HIV) infection and acquired immune deficiency syndrome (AIDS).
- There is a stereotypical time course for the development of opportunistic processes in patients with HIV infection.
- The risk for these disorders increases when the CD4 count falls to less than 200.
- For some processes, such as lymphoma and tuberculosis, presentation may occur at a CD4 count of more than 200.
- Cytomegalovirus (CMV) infection, cryptosporidia, microsporidia, and Mycobacterium avium complex (MAC) occur when the CD4 count is less than 100 and often less than 50.
