Microbial Ecology and Human Health
The human body operates as an intricate biological system maintaining various microbial species across its entire ecosystem. These microorganisms live in different locations including the gastrointestinal tract, skin, respiratory system, and oral cavity. A healthy state maintains microbial communities that operate at a stable level with diverse populations (National Academies Press, 2014).
Beneficial microorganisms help with food digestion, produce vitamins, control immune system function, and compete with dangerous pathogens. A diverse microbiome functions as a key health indicator.
Healthy Microbiome vs. Dysbiosis
| Microbiome Ecosystem Status | |
|---|---|
| Healthy State (Symbiosis) | Disrupted State (Dysbiosis) |
| High microbial diversity and richness | Low microbial diversity; one or few strains dominate |
| Beneficial microorganisms compete with harmful pathogens for nutrients and binding sites | Rise in inflammatory bowel disease (IBD) |
| Higher risk of allergies, obesity, and autoimmune conditions | |
| Strong, intact intestinal barrier | Compromised gut lining ("leaky gut") |
The Gut Mycobiome and Disease
Most microbiome research focused on bacteria until scientists discovered that fungi function as vital components of the human microbiome. The mycobiome is a smaller yet important microbial community found mainly in the gastrointestinal tract. Maintaining equilibrium between bacterial and fungal populations is necessary to prevent aggressive overgrowths such as Candida (Huseyin et al., 2017).
Diseases linked to microbial imbalance include:
- Inflammatory Bowel Disease (Crohn’s Disease and Ulcerative Colitis)
- Irritable Bowel Syndrome (IBS)
- Metabolic disorders including obesity and Type 2 Diabetes
- Autoimmune conditions and systemic allergies