Campylobacter jejuni is a Gram-negative, spiral-shaped bacterium that is a leading cause of bacterial foodborne illness worldwide. It is commonly found in the intestines of animals such as poultry, cattle, and swine, and can be transmitted to humans through consumption of contaminated food, especially undercooked poultry. Research on Campylobacter jejuni focuses on understanding its pathogenesis, transmission, antibiotic resistance, and strategies for prevention and control of infections. Studies also investigate the molecular mechanisms of host-pathogen interactions and immune responses to the bacterium. Additionally, research aims to develop improved diagnostic methods for detecting Campylobacter jejuni in food and clinical samples, as well as novel therapeutic approaches for treating infections. Overall, research in this area plays a crucial role in reducing the burden of Campylobacter-related illness and improving food safety practices.