When you have blood drawn can they determine if you have any type of sexual diseases like genital herpes, hiv, std etc?

Blood tests: There are some blood tests which can look for the presence of antibodies which represent current or previous exposure to a virus or bacteria. These include tests for HIV and syphilis and herpes virus (hsv). Other STDs can be detected using swabs/cullures from sites of infection (throat, anus, urethra) or from urine tests (nucleic acid amplification tests). See your provider for the right test.

STD testing: Yes. We generally test for hiv, hepatitis, syphillis, herpes with blood work. These test are only run if asked for.

Yes, if asked for.: Blood tests can determine several sexual diseases after a period of time after exposure, like syphilis, hiv, herpes, and hepatitis b. It is not the only way for many of them. Syphilis can be found out by swabbing affected areas, as can herpes which can even be diagnosed visually. But gonorrhea and chlamydia are diagnosed by culture and urinalysis. Hpv is determined by pap smear and biopsy.