Ken Lassesen's model
Ken Lassesen is a mathematician and software engineer who first became ill with chronic fatigue syndrome in 1972, then 2001, 2012. Each recovery was connected to a treatment that would have altered gut microbiome (although that was not the intended target for the first two recoveries). He believes the symptoms of CFS are caused by gut dysbiosis because it meets Osler criteria -- the simplest model that is consistent with all of the observations. He outlines his model in a paper.
Variation between patients in the population of gut bacteria explains the heterogeneity of symptoms.
Gut Bacteria Shifts Seen
The model is based on the shifts reported in 1998 and 2001 at Australian CFS/ME Clinical and Scientific Meeting. He has produced a matrix showing how certain anti-pathogens impacts the 6 key bacteria shifts reported in the literature.
|Antibiotic Family||Klebsiella/Enterobacter||Enterococcus||Streptococcus||E.Coli||Bifidobacterium||Lactobacillus||Score for CFS|
|In CFS Patients||HIGH||HIGH||HIGH||low||low||low *|
|Lactobacillus probiotics (General)||Resistant||Resistant||Effective||Effective||Effective||n/a||-3|
Scoring done by 1 for each EFFECTIVE in high (good) and -2 for each EFFECTIVE in low (the harm is more significant than the good). Postive scores are desired
Lasses theorizes that a variety of probiotics may be of benefit in correcting the dysbosis along with herbal and pharmaceutical antibiotics. The success of treatment and the specific strains most likely to be effective may depend in part on the specific profile of a patient's gut bacteria, which is impossible to fully characterize under existing measurement techniques.
He recommends strict avoidance of any lactobacillus acidophilus containing probiotics or yogurts and other lactic acid producing strains. And he recommends the use of bifidobacterium-only products as well as Align, Mutaflor, Miyarisan and Prescript Assist.
While there has a been no research on the application of Lassesen's theory in CFS patients, there is some research in CFS and more extensive research in irritable bowel syndrome supporting aspects of his approach. In early 2016 a web-based study will begin through Mendus wherein ME/CFS patients can participate in a study that will address aspects of Lassesen's (and others) thoughts concerning gut dysbiosis.
Chronic fatigue syndrome
One study found increased d-lactic acid intestinal bacteria in CFS patients.
- Remissions from Chronic Fatigue Syndrome - CFS for NDs, Patients and Evidence based MDs - 2012
- Reference needed