It is possible to predict what kinds of opportunistic diseases are likely to develop from the number of CD4+ lymphocytes found in blood. As the CD4+ cell count goes below 200/ƒÊl of blood, various types of diseases could develop in the patient. Please take both of antibody and antigen tests early if you have developed any of them. Also, make sure to record the test results in the infection checklist. Take precautionary measures to reduce the risk of opportunistic diseases. For example, if your CD4 count is 200 or below, take the sulfamethoxazol/trimethoprim mixture (Baktar) to prevent Pneumocystis pneumonia. * Pneumocystis carinii has changed its name to Pneumocystis pneumonia.