It is a bacterial infection caused by the bacteria Haemophilus ducreyi. It attacks the tissue and produces an open sore referred to as a chancroid or an ulcer. The ulcer may bleed or produce a contagious fluid that can spread the bacteria. According to Medline plus the infection is found in most parts of the world particularly Africa and South West Asia.

Chlamydia is a bacterial infection commonly passed from one person to another through unprotected sex and is mostly rampant among sexually active teenagers and young adults.  It is caused by the bacterium chlamydia trachomatis and is often called the “silent infection” because most people do not realize they have it.

Gonorrhea is an STI caused by the bacteria Neisseria gonorrhoeae or gonococcus. It is mainly found in the discharge from the penis and vaginal fluid. The bacteria infects the cervix, urethra, and the rectum and in some rare cases the throat or eyes.

HIV is a virus that gradually attacks the immune system, therefore, weakening a person immunity levels.

Genital Herpes is caused by the Herpes simplex virus. It affects any mucous membrane such as those found in the mouth. There are two types of herpes namely, type 1 and type 2.They are both very contagious.HSV type 1 affects mostly the mouth and lips and causes cold sores or fever blisters. However, it can be passed from the mouth to the genitals through oral sex. HSV type 2 often causes genital herpes and can be spread through fluids from the mouth or genitals.

Hepatitis is an inflammation of the liver caused by a viral infection. Hepatitis B virus is very common worldwide and is very infectious.

Pelvic inflammatory disease is an infection of a woman’s reproductive organs caused by some STDs like chlamydia and gonorrhea. It is caused by more than one type of bacterium.