Which is false about syphilis -
Ans. is 'b' i.e., TPHA is earliest to be (+) ye About other options - TPI is a specific treponemal test and gives definite diagnosis. - VDRL test becomes positive 7-10 days after the appearance of primary chancre (3-5 weeks after acquiring the infection.) - All treponemal and nontreponemal serological tests may be positive in nonveneral treponematoses (eg yaws, pinta and endemic syphilis), so can not differentiate nonveneral treponematoses from syphilis.
TPI gives definite diagnosis
TPHA is earliest to be +ve
VDRL is +ve 1 week after appearance of chancre
Serologically not different from yaws