Is person get tetanus if person eat cow poop or any thing like that if poop enter in your mouth or something like that plz tell thanx ?

No: The Clostridium tetani bacterium will not enter the body thru the gastrointestinal tract. Nor will it grow in healthy tissue. It most often is the result of a deep penetrating injury such as stepping on a nail that's been outdoors and exposed to C. tetani spores that that are ubiquitous in soil. Approximately 300,000 to 500,000 people die from tetanus yearly, mainly in undeveloped countries.