Motility as an intestinal colonization factor for Campylobacter jejuni

Area of Science:

• Microbiology
• Gastroenterology
• Bacterial Pathogenesis

Background:

• Campylobacter jejuni is a leading cause of bacterial gastroenteritis worldwide.
• Understanding the factors influencing C. jejuni colonization is vital for developing effective interventions.

Purpose of the Study:

• To investigate the role of bacterial motility in the intestinal colonization of suckling mice by C. jejuni.

Main Methods:

• Oral challenge of suckling mice with wild-type and nonmotile C. jejuni mutant strains.
• Assessment of bacterial colonization in the lower small intestine, caecum, and colon at 2 days post-inoculation.

Main Results:

• Wild-type C. jejuni successfully colonized the lower intestinal tract.
• Nonmotile mutant strains, regardless of flagellar structure, were cleared from the gut.
• An atypically motile strain showed limited colonization, dependent on inoculum size.

Conclusions:

• Bacterial motility is a critical factor for C. jejuni colonization in the intestinal tract of suckling mice.
• Flagellar structure and function are essential for successful gut colonization by C. jejuni.