You can't get gonorrhoea from a tractor. Or from toilet seats. The germ that causes gonorrhoea dies very soon after being outside the body. It would not survive long enough to affect anyone.

You get gonorrhoea from having sexual intercourse.

An antigonorrhoeic is an agent which counteracts gonorrhoea.

i think it could be gonorrhoea

Gonorrhoea... is usually the case.

Blennorrhagia is a technical term for excessive blennorrhoea, or mucous discharge, especially as seen in gonorrhoea.