As described earlier, eucaryotic cells are impervious to antibiotics. Normally, a healthy gut flora will keep these infectious yeast at bay. Once antibiotics kill and weaken their neighbors, they can rapidly grow and become too much to constrain. Candida albicans have been associated with all sorts of chronic illnesses, one of the most common being chronic fatigue syndrome. Once established, it is very difficult to rid the body of a candida albican infection.
Antibiotics are a double edged sword.
Their power of fighting infection is indiscriminate towards all bacteria. All bacteria succumb to their powers, no mercy is shown towards beneficial strains. One should avoid the use of antibiotics unless it becomes life threatening. The human immune system has developed many ways to survive an infection and should be trusted, nourished, and given time. Our species would not have survived if our immune system was not the best defense we have against deleterious infections.