These tests look for some of the most common sexually transmitted pathogens. The Anti-HCV blood test detects a specific antibody to the hepatitis C virus indicating an HCV infection has occurred now or in the past. Infection with the hepatitis C virus (HCV) can lead to chronic liver disease. The Anti-HIV+p24 Ag blood test is a combined test that screens for and diagnoses infection from the Human Immunodeficiency Virus (HIV) which is the virus that causes AIDS (Acquired Immunodeficiency Syndrome). The p24 antigen test allows for early detection of infections. The Hepatitis B Surface Antigen (HbsAg) bloodtest looks for the presence of the hepatitis B virus (HBV). The HBsAg test can indicate an acute or a chronic infection from HBV. The Hepatitis B core antibody (HBc Ab total) blood test detects both IgM and IgG antibodies, and may be a marker of a recent hepatitis B infection. The Syphilis antibody total blood test is used  to screen for infection with  the bacterium that causes syphilis, Treponema pallidum. The infection remains detectable until adequate treatment is received. The Hepatitis A antibody (HAV Ab) test is a blood test that looks for specific antibodies produced in response to the virus that causes hepatitis A. These antibodies will be present in your blood if you have a current or past hepatitis A infection.