Assessment of bacterial antibiotic resistance transfer in the gut

Area of Science:

• Microbiology
• Genetics
• Public Health

Background:

• The increasing prevalence of antibiotic-resistant bacteria and treatment failures highlights the critical issue of antibiotic usage.
• Broad-spectrum antibiotics exert selective pressure on gut flora, promoting the emergence of multi-resistant bacteria in a detrimental cycle.
• The human gastrointestinal (GI) tract harbors a vast bacterial population, serving as a significant reservoir for antibiotic resistance genes (ARGs).

Purpose of the Study:

• To assess the mechanisms and extent of horizontal gene transfer (HGT) of antibiotic resistance genes within the GI tract.
• To investigate the role of factors like antibiotic use and probiotics in the dissemination of ARGs in the gut.
• To understand the contribution of the gut microbiome to the overall challenge of antibiotic resistance.

Main Methods:

• Review and synthesis of existing literature on bacterial HGT in the GI tract.
• Analysis of the impact of antibiotic selective pressure on ARG prevalence.
• Examination of the role of fermented foods and probiotics as potential vectors for ARG transfer.

Main Results:

• The GI tract is a dynamic environment facilitating HGT of ARGs among diverse bacterial species.
• Widespread antibiotic use drives the selection and proliferation of bacteria carrying ARGs.
• Probiotics and fermented foods, while beneficial, can also introduce and facilitate the transfer of ARGs within the gut microbiome.

Conclusions:

• Horizontal gene transfer in the gut significantly contributes to the spread of antibiotic resistance.
• Reducing unnecessary antibiotic use and carefully considering the microbial content of probiotics and fermented foods are crucial.
• Further research is needed to fully elucidate the complex interplay of factors influencing ARG transfer in the human gut.