Method of chlamydia prophylaxis

A method for prophylactically reducing the risk of transmission of chlamydia to a recipient and protecting the recipient from infection with chiamydia comprising topically applying a chlamydia prophylactic effective amount to that site on the recipient which is likely to be exposed to chiamydia a composition comprising a chlamydia prophylactic effective amount of a compound having the structure

• wherein each
• A is the same or different and is an alkyl group, a phenyl group or a substituted derivative of a phenyl group;
• Y is the same or different and is hydrogen, an unbranched alkyl group, a halide or a group having the structure
• wherein R is hydrogen, an alkoxide group, an alkyl group, or OH;
• B is the same or different and each is hydrogen or an alkyl group;
• Z− is a soluble, pharmaceutically acceptable negative ion;
• and
• X is the same or different and is an axial ligand selected from the group consisting of moieties having the formula:
• wherein R1, R2, R3 and R4 are the same or different and may be hydrogen or lower alkyl having from 1 to 4 carbon atoms;
• with the proviso that R1, R2, R3 and R4 are of a sufficiently small size so as not to prohibit the attachment of the axial ligand to the Co atom due to steric hindrance.