In Bergen in Norway we had a big outbreak of Giardia parasite and a lot of people got CFS/ME after that. The Giardia was big because the parasites came into the drinking water from one of the water sources. I myself had this for of this for many years afterwards but one do not notice it since before you get rid of it. I was able to function normally but totally lacked energy, and everything was a chore. It was like the feeling the first time one drinks coffee and experience the way the fog clears up.
Conclusion. The study shows that Giardia duodenalis may induce CFS persisting as long as five years after the infection. Obstructive sleep apnoea/hypopnoea syndrome, depression and anxiety were important differential diagnoses, or possibly comorbidities, to post-infectious fatigue in this study.
Conclusion. The study shows that Giardia duodenalis may induce CFS persisting as long as five years after the infection. Obstructive sleep apnoea/hypopnoea syndrome, depression and anxiety were important differential diagnoses, or possibly comorbidities, to post-infectious fatigue in this study.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3598369/#:~:tex....
Also very impressed with google when searching for: giardia leads to CFS