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
Rudolf Hamburger recorded is restricted to his address and one or two basic personal details. This may have reflected the sensitive nature of some of the relevant sources. Ministry for State Security files on Hamburger refer to information held by the Party Central Committee or "elsewhere", without spelling out more detail, beyond the high level statement that he was "active in the anti-fascist movement" and had been accepted for membership by the Party Central Committee. Rudolf Hamburger was accepted as a full party member in March 1958. Rudolf Hamburger made his home in Dresden. Important projects he directed while employed by the