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PROZONE PHENOMENON IN SECONDARY SYPHILIS. THE IMPORTANCE OF COMMUNICATION BETWE...

The prozone phenomenon is defined as a falsely negative test due to very high titters of antibody, as high titters of antigen or antibody may prevent the formation of antigen-antibody complexes in laboratory tests of many diseases, like syphilis or brucellosis. We describe the case of a 27 year old caucasian male admitted in the emergency room with enlarged palpable lymph nodes and a skin eruption either sugges...