Can you get chlamydia by saliva? as in kissing someone mouth to mouth, sharing food, sharing the same straw, etc. ?

Here are some ...: Chlamydia trachomatis is transmitted by vaginal, oral, or anal sexual activities, through which the bacteria gain their foothold through microscopically injured mucosa due to the breakdown of natural barrier by sexual acts. The acts you mentioned wouldn't suffice to break such barrier, except possible existing sore. But remember: The exposed woudn't necessarily contract infection...