You will be assigned randomly (like tossing a coin) to receive either antibiotics or a placebo (sugar pill). Neither you nor your doctor will know which you are receiving. You will learn to give yourself the injection, and you will remain on your study drug for 28 days. A home health care nurse will visit you twice a week to check the injection site, and at weeks 1 and 3 the nurse will draw blood for laboratory tests. At months 1 and 6, you will be examined to see if you have fewer chronic fatigue symptoms after the antibiotics. This will include a fatigue questionnaire, a test of your mental processing speed, and a test of your cerebrospinal fluid.