A VDRL reactive mother gave birth to an infant. All of the following would help in determining the risk of transmission to the infant except -
TPHA test on the serum sample of the mother:
Indicates mother has syphilis. But it doesn’t say about the congenital syphilis. Moreover, TPHA remains elevated even after treatment. So, an adequately treated mother before 4th month of gestation has a very less risk of transmission but can still have an elevated TPHA.