Which is showing accurate pairing?

Explanation

Syphilis is caused by a spirochete (spiral bacterium) called Treponema pallidum. The symptoms of syphilis occur in three stages. The first stage usually consists of a painless lesion called a chancre at the organism's site of entry. The second stage begins when the organism enters the bloodstream. Symptoms such as fever, flu-like illness, a skin rash, hair loss, and swollen joints may come and go over a period of several years. In the third stage, permanent brain damage, heart disease, and blindness often occur. AIDS is a viral disease caused by the Human Immunodeficiency Virus (HIV). Gonorrhea is a sexually transmitted disease, and its causative organism is Neisseria gonorrhoeae. Typhoid is caused by the bacillus bacterium Salmonella typhi.