Recurring infection...tooth abscess?

My husband has been complaining of tooth pain since the end of last year. In early March he developed a fever, sore throat, and swollen lymph nodes. He saw a doctor and strep throat and mono were ruled out as a cause. The doctor prescribed Amoxicillin 3 times a day for 10 days. He felt fine after a couple of days and all was well. But about two weeks later the same symptoms returned (w/ a fever of 101.6) and the doctors ruled out strep and mono once again and put him on the same medication regimen. Could his symptoms possibly stem from a tooth abscess??  If not a tooth abscess what else do you think could be causing his symptoms? Thank you in advance for your response.

[scottma]

Seeing a dentist to find out source of dental infection is advised.

[Gellia]

When your DH taps on the tooth, does it hurt?  Is it painful with cold, hot or sweets?
All of these things can point to a badly infected tooth.  It certainly can give him a sore throat and swollen lymph glands.
Antibiotics will only work with that kind of an infection for so long.  It will reoccur unless properly addressed.  He really should get to a dentist and have the tooth checked with a xray to see if there is an infection at the root.  
Best to you and him,
Gellia