We say "have gonorrhea", not "have a gonorrhea". Most names of illnesses are uncountable; therefore, they don't take a/an.
We say "have gonorrhea", not "have a gonorrhea".
The doctor said she has gonorrhea.
The doctor said she has a gonorrhea.
Most names of illnesses are uncountable; therefore, they don't take a/an.
The tests suggest that Robert has gonorrhea.
Follow the same convention with the expressions "get gonorrhea", "cause gonorrhea", "treat gonorrhea", "contract gonorrhea", etc.
How do people get gonorrhea?
You can't treat gonorrhea with home remedies.
The clap is a slang term for gonorrhea, which requires the article "the".
Peter caught the clap from his girlfriend
A partial list of diseases and symptoms that do not take a/an can be found below: