All of the following statements are about Non Typhoid Salmonella (NTS) are true, EXCEPT:

Animals constitutes the principle source of human NTS infection, and cases have occurred where individuals have had contact with infected animals, such as cats, dogs, reptiles, pet rodents and amphibians. Thus shows humans are not the only source of infection. Ref: Kliegman, Behrman, Jenson, Stanton (2008), "Nelson Textbook of Pediatrics", Chapter 195, "Salmonella", Volume 1, Page 1183; Harrison's Principles of Internal Medicine, 17th Edition, Page 960