Perturbation of intestinal microflora

Area of Science:

• Microbiology
• Pharmacology
• Gastroenterology

Background:

• Antibiotics are crucial for treating infections but can disrupt the gut microbiome.
• The intestinal microflora plays a vital role in host health, influencing metabolism and immunity.
• Understanding antibiotic effects on gut microbes is essential for public health.

Purpose of the Study:

• To review the effects of antibiotics on intestinal microflora composition and function.
• To differentiate effects of therapeutic antibiotic doses from low-level residues.
• To highlight the knowledge gap regarding low-level antibiotic exposure.

Main Methods:

• Literature review of studies on antibiotic impacts on gut microbiota.
• Analysis of microbial constituents, antibiotic sensitivities, and metabolic activities.
• Discussion of findings related to therapeutic versus residue concentrations.

Main Results:

• Therapeutic antibiotic doses cause significant alterations in intestinal microflora.
• The impact of low antibiotic concentrations, such as food residues, is largely uncharacterized.
• Metabolic activities of gut microbes are sensitive to antibiotic exposure.

Conclusions:

• Antibiotics profoundly affect the intestinal microbiome at therapeutic levels.
• Further research is needed to understand the consequences of chronic low-level antibiotic exposure from food residues.
• The gut microbiome's resilience and adaptation to varying antibiotic levels require investigation.