The main categories of STDs are:
1. Caused by bacteria
Examples:
i. Syphilis
ii. Chlamydiosis
iii. Gonorrhoea
2. Caused by viruses:
Examples:
i. Hepatitis B
ii. Herpes
iii. Genital Warts
3. Caused by other organisms:
Examples:
i. Pubic lice
ii. Vaginal yeast infection
iii. Trichomoniasis