A nine year old boy presents to your office after a camping trip with his boy……

A nine year old boy presents to your office after a camping trip with his boy scouts group one week ago. He looks fairly toxic with fever of 39.5C, headache, myalgia, nausea, vomiting, and an erythematous macular rash on the wrists, ankles and proximally on the trunk. The best treatment for this illness is:
a) Ceftriaxone
b) Gentamycin
c) Acyclovir
d) Tetracycline
e) Aztreonam