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Co-culture of Living Microbiome with Microengineered Human Intestinal Villi in a Gut-on-a-Chip Microfluidic Device

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Factors that alter rumen microbial ecology.

J B Russell¹, J L Rychlik

¹Agricultural Research Service, U.S. Department of Agriculture, USA.

Science (New York, N.Y.)

|May 16, 2001

Summary

Diets low in fiber disrupt the symbiotic relationship between ruminants and ruminal microbes, leading to health issues. Feed additives may help but can further alter the ruminal ecosystem.

Area of Science:

Animal Science
Microbiology
Veterinary Medicine

Background:

Ruminants and ruminal microorganisms rely on symbiosis for fiber digestion.
Modern domestic ruminant diets in developed nations often lack sufficient fiber, favoring grain-based rations.

Purpose of the Study:

To examine the consequences of fiber-deficient diets on ruminant physiology and ruminal microbial ecology.
To understand the impact of common feed additives on the ruminal ecosystem.

Main Methods:

Analysis of physiological homeostasis disruption in ruminants.
Monitoring of ruminal pH and microbial ecology shifts.
Evaluation of the effects of feed additives like antibiotics and buffers.

Main Results:

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Fiber-deficient diets disrupt physiological homeostasis and lower ruminal pH.
These diets alter ruminal microbial ecology, increasing susceptibility to metabolic and infectious diseases.
Feed additives, while counteracting some disorders, further modify the ruminal ecosystem's composition.

Conclusions:

Fiber-deficient diets pose significant health risks to domestic ruminants.
The use of feed additives necessitates careful consideration due to their impact on the ruminal environment.