Final answer:
HIV screening is recommended for sexually active individuals with multiple partners. There are different types of tests that can be used to determine if a patient has HIV.
Step-by-step explanation:
According to the clinical guidelines, HIV screening is recommended for people at high risk of HIV infection, which includes individuals who are sexually active with multiple partners. In this case, the 24-year-old man who is sexually active with men and has had multiple partners in the past year falls under the high-risk category. Therefore, HIV screening is recommended for him as part of his routine exam.
There are different types of tests that can be used to determine if a patient has HIV. One common test is the indirect ELISA, which looks for HIV antibodies in the blood. If the ELISA test comes back positive, a confirmatory test called a western blot is performed. Another test that can be used is a PCR (polymerase chain reaction), which detects the presence of HIV sequences in the patient's blood.