This document summarizes recent research on Campylobacter sources of human infection and antimicrobial resistance. It discusses several key points: 1) Poultry, specifically contaminated chicken products, is a major source of human campylobacteriosis. Different Campylobacter types are found in different hosts, allowing attribution of disease source. 2) Methods like multilocus sequence typing (MLST) and machine learning can be used to attribute clinical isolates to different host sources based on genetic markers. Accuracy depends on the composition of reference datasets. 3) While poultry is generally the primary source, the proportion of cases attributed to different sources can vary between countries. Ruminants account for a greater proportion