Which one of the following is not a sexually transmitted disease?
Sexually transmitted diseases (STDs) or veneral diseases include syphilis (T. pallidum), AIDS (HIV) and trichomoniasis (T. vaginalis). Transmission of STDs occurs through direct contact with blood, body fluids etc.
Encephalitis is an acute inflammation of brain caused by bacterial, viral or other pathogens. No direct transmission through body fluids is essential as it is not an STD.