 [ Symptoms ] can females receiving oral sex contract chlamydia  i recently tested positive for chlamydia i have contacted my ex boyfriend to tell him to get tested but before i dated him i received oral sex from a different partner he and i had no other sexual contact is it possible that i contracted it from him if so how likely is it that i did contract it from him  thanks [ Disease ] out of nearly hundred person having sex with hiv human immunodeficiency virus positive person hardly less than one may get infected the chances of acquiring hiv after sexual exposure is less than one percent i would suggest you to get hiv rt pcr real time polymerase chain reaction and elisa enzyme linked immunosorbent assay for hiv  1 and hiv  2 antibody from two different laboratory as far as progression of the disease is concerned hiv rna would be positive false positive or negative do not occur every time be positive revert back with the test results to a hiv aids specialist online   > <link>