Can regular blood check detected std and sti diseases

[Becarefulle]

Can regular blood check detected std and sti diseases?

[Griffon]

Hi , Blood tests only show the specific things that are being tested for , example an HIV blood test will not show liver function or anything else other than HIV . Some STI's such as syphalis show up on a blood test if that is what is being tested for , but most STI's are diagnosed using swab tests .