I had a number of odd infections/infestations over the years - Lyme's, Brucellosis and quite a few parasites. I was exposed to Chagas Disease in South America but did not develop symptons. Chagas is carried by kissing bugs and passed to you through their saliva when they bite. I had a malaria in my spleen for years.
The underlying cause that left me succeptable to these infections was an intolerance to gluten (Celiac Disease, an autoimmune problem. That would be the first step in your figuring out why you are getting these problems. The Celiac panel is done after about a month of eating sufficient gluten foods to raise the autoantibody levels into the detectable range.
I have found Clark's Zapper to be helpful. I eliminated Lyme's by using the zapper for extended periods of time and also taking homeopathic drops.