A healthy result should fall into the range 0 - 86000000 CFU/g stool.
Methanobrevibacter smithii is highly prevalent in the human gut. Lower counts have been associated with obesity while higher amounts have been associated with anorexia.
Obesity-associated gut microbiota is enriched in Lactobacillus reuteri and depleted in Bifidobacterium animalis and Methanobrevibacter smithii. [L]
- Lower counts of Methanobrevibacter species reported in human obesity
- Reduced levels linked with IBS-D (Irritable Bowel Syndrome with diarrhea)
- Some studies have reported lower counts in IBD (Inflammatory Bowel Disease) conversely, other have reported Increased abundance
- Abundance associated with higher bacterial gene richness in the gut
- Higher amounts reported in anorexia, in contrast, one study confirmed a positive association with increased BMI and body fat in methanogen-colonized populations
- Higher levels linked to IBS-C (Irritable Bowel Syndrome with Constipation)
- Methanogens found higher in people with colon cancer, colonic polyposis, ulcerative colitis and diverticular disease (sigmoidoscopy enema samples)
- Some studies have reported lower counts in IBD conversely, other have reported Increased abundance
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