A sexually transmitted disease (STD), also known as sexually transmitted infection (STI) or venereal disease (VD), is an 
illness that has a significant probability of transmission between humans or animals by means of sexual contact (wikipedia.org). Sexually transmitted infection can be classified into bacterial, viral, parasitic and fungal diseases based on the cause of the disease. The following article will describe about this sexually transmitted disease, the pathogenesis and laboratory diagnostic needed.
You will find the sexually transmitted bacterial diseases (Syphilis, Gonorrhea, Chancroid, Chlamydial diseases), The sexually transmitted viral diseases (AIDS, Hepatitis B, Warts), Trichomoniasis and genital candidiasis as the parasitic and fungal diseases. The article described you with pathogenesis and laboratory diagnostic of Syphilis, Gonorrhea, and AIDS.
You are also given with explanation about Treponema pallidum immobilization test (TPI), Fluorescent treponemal antibody absorption test (FTA-AB), Treponema pallidum haemagglutination test (TPHA), ELISA test and Western blot test as laboratory diagnostic for syphilis and AIDS. The decriptions are given in brief, clear and easy to understand.
Complete read of The Pathogenesis and Laboratory Diagnostic for Sexually Transmitted Disease can be downloaded in this STD Article (source: textbooksonline.tn.nic.in).
