STI Blood test

• Unusual genital discharge.
• Pain during urinating or sexual activity.
• Sores, blisters, or redness in the genital region
• Lower abdomen or pelvic discomfort.
• Fever or flu-like symptoms.
• Unexplained tiredness
• Exposure to a spouse with an STD
• No symptoms (regular screening in sexually active persons).

• Following unprotected sexual contact.
• If signs of an STI exist
• Regular sexual health screening
• During pregnancy
• If a partner has been diagnosed with an STI
• Before beginning a new sexual connection.

• HIV (a virus that impairs the immune system).
• Syphilis (a bacterial illness that develops in stages if left untreated).
• Hepatitis B (a viral illness affecting the liver).
• Hepatitis C (a bloodborne virus that causes liver inflammation).
• Herpes simplex virus (HSV, a viral illness that causes recurring sores).

• Antibody testing measures the body’s immunological response to infections.
• Antigen tests detect particular proteins from viruses.
• Combination tests identify antigens and antibodies (e.g., HIV testing).
• PCR testing can identify the genetic material of infections in some circumstances.

The results indicate whether an infection is currently present, if there has been prior exposure, or if no infection has been found. Positive results may require additional confirmation testing and subsequent care, while negative results may warrant repeat testing depending on the timing of the exposure.

• Some illnesses require a “window period” before discovery.
• Not all STIs are detected with blood testing. For example, chlamydia frequently requires swabs or urine tests.
• Testing too early may result in false negatives.
• Additional testing may be necessary to confirm.

• No fasting is normally necessary.
• Inform your doctor about any symptoms or recent exposure.
• Avoid testing too soon after exposure (get medical care).
• Stay hydrated.