Salmonella food poisoning is spread by bacteria ingested in food, or on food prepared in unhygienic conditions. In the UK, poultry are vaccinated against Salmonella to control the spread. The fever, abdominal cramps, vomiting and diarrhoea are caused by the bacteria and by the toxins they secrete.
Gonorrhoea is a sexually transmitted disease (STD). The symptoms are a thick yellow or green discharge from the vagina or penis and pain on urinating. It is caused by a bacterium and is spread by sexual contact.
Gonorrhoea was easily treated with the antibiotic penicillin until many resistant strains appeared. The spread can be controlled by treatment with antibiotics or by using a barrier method of contraception, such as a condom.