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
Cao Hamburger Went on Vacation"), partly based on his childhood memories. Hamburger was also one of two creative directors for Rio's contribution to the 2012 Summer Olympics opening ceremony. Cao is the son of physicists and University of São Paulo professors Ernst Wolfgang Hamburger, of Jewish-German origin, and Amélia Imperio Hamburger, of Italian origin. He has three sisters: Sonia, a film producer, Vera, an art director and Esther, a university professor. His brother Fernando is a photographer. Cao Hamburger Carlos Império Hamburger, better known as Cao Hamburger (; born 1962 in São Paulo), is a Brazilian screenwriter and director of movies and