It certainly seems that way sometimes, yet not all bacteria are bad. Think of the "friendly bacteria" found in probiotics, yogurt, etc. However this is different, Chikungunya is caused by a virus and there is no cure.
Not every virus is bad either. There are viruses that infect and kill bacteria.
With a virus like this, a vaccine is about the best that medical science would be able to come up with today. There are antivirals but the technology is not advanced.