Human Intestinal Microbiota: Interaction Between Parasites and the Host Immune Response

Area of Science:

• Microbiology
• Immunology
• Parasitology

Background:

• The human gut harbors a complex microbial ecosystem influencing host physiology, immunity, and protection against pathogens.
• Intestinal protozoa are significant public health concerns, particularly in regions like Mexico.
• The ecological niche vacated by declining helminth infections has been increasingly occupied by protozoa.

Purpose of the Study:

• To review the interactions between the intestinal microbiota and protozoa.
• To highlight the role of the gut microbiome in modulating protozoan infections and host immune responses.
• To discuss implications for preventing and treating protozoan infections.

Main Methods:

• Literature review focusing on interactions between intestinal protozoa and the gut microbiome.
• Analysis of studies investigating the immunoregulatory effects of microbiota on protozoan colonization.
• Examination of specific protozoan infections including Entamoeba histolytica, Blastocystis spp., Giardia duodenalis, Toxoplasma gondii, and Cryptosporidium parvum.

Main Results:

• Gut bacterial populations significantly modulate the progression and outcomes of protozoan infections.
• The intestinal microbiota generally plays a protective role against protozoan infections.
• Understanding these interactions may lead to microbiota-based therapeutic strategies.

Conclusions:

• The gut microbiota is crucial for maintaining health and preventing protozoan infections.
• Further research into microbiota-protozoa-host interactions can inform novel treatment and prevention methods.
• Dysbiosis can exacerbate parasitic, allergic, and autoimmune disorders.