<s>[INST] hello sir, i recently got blood test were vdrl shown 1:4 dilution but tpha is showing negative whats that mean is really serious i had sexual transaction they told me to consult vd specialist and given doxy 1-L 100mg for 3 weeks they assured me it will became normal after a month [/INST] Hello dear, Thank you for your contact to Chat Doctor. I read and understand your concern. I am Chat Doctor answering your concern.TPA is the better diagnostic test than V Chat Doctor. If TPA is coming negative you are mostly negative for syphilis. But you can take the treatment only after seen by the VD specialist. In my opinion there is no need for treatment. I advise you to take the second test of V </s>