Will stds be detected in urinalysis, syphilis serology tests?

Depends.: In an normal urinalysis they do not test for stds. But you can use the same urine sample to test for chlamydia or gonorrhea. When they take blood for the syphilis test, the can also test for HIV and hep c, but not for chlamydia or gonorrhea. In summary, to have a "full std panel", you need to give both blood and urine.

Depends: Syphilis serology will detect syphilis. A urinalysis will pick up trichomonas but most other STDs need to be specifically tested for - gonorrhea, chlamydia, herpes, hiv, hepatitis b & c, etc.