Many of the microbial agents that cause vaginal infections can be transmitted from common areas or through sexual contact between partners. Both partners can pass it on to each other, and in either case the man may have no symptoms. For these reasons, attention should be paid to hygienic conditions in daily life and the use of condoms during intercourse. In addition, co-treatment often increases treatment effectiveness, especially in recurrent infections. When progressive infections such as gonorrhea, chlamydia, and syphilis are detected, the partner is referred to urology for treatment, whether or not he has symptoms. Condoms provide a high protection rate of 85 percent for vaginally transmitted infections.