Can cocaine be detected in a blood test?
No, not all STDs are detected through blood tests. HIV, hepatitis, and syphilis can be detected by a blood test. A blood test can tell you if you were exposed to herpes virus, but can't tell you if the location of the infection is genital, oral, or elsewhere. STDs that can be detected from a blood sample include HIV, hepatitis, and syphilis. The others can't be detected that way.