Hamburger such as , due to the occasional initial improper preparation of the meat, so caution is needed during handling and cooking. Because of the potential for food-borne illness, the USDA recommends hamburgers be cooked to an internal temperature of . If cooked to this temperature, they are considered well-done. Burgers can also be made with patties made from ingredients other than beef. For example, a "turkey burger" uses ground turkey meat, a "chicken burger" uses ground chicken meat. A "buffalo burger" uses ground meat from a bison, and an "ostrich burger" is made from ground seasoned ostrich meat. A deer
History of the hamburger variations on the burger adapted to the Asian world, including the teriyaki burger, takumi burger, and riceburger. In Hong Kong, Aji Ichiban competed with large chains before it spread quickly throughout Asia. One of the first hamburger vending machines debuted in Amsterdam in 1941 under the brand "FEBO", its name derived from its original place of creation, the Ferdinand Bolstraat. At the same time the hamburger was growing in popularity around the world, it took on a variety of local features in different locations. Such examples of this include ground meat made from local animals, such as kangaroos in Australia,