Is campylobacter jejuni contagious?

Yes, but: It is more likely to come from an infected animal such as poultry than from another person infected with it.

Campylobacter jejuni: Campylobacter can be transmitted through sexual contact between people, contaminated drinking water, fecal-oral route, contact with infected pets, livestock, poultry & drinking raw milk or eating under-cooked poultry.It can be diagnosed through stool cultures, gram stain & antigen testing is being developed.