The Spirillum of Gamaleia, also known as Pasteurella multocida, is a bacterium that affects various animals, especially birds and mammals. This pathogen is responsible for several diseases, including fowl cholera and hemorrhagic septicemia. Synonyms for the Spirillum of Gamaleia include Pasteurella multocida, Bacterium multocidum, and Pasteurella septica. These terms are often used interchangeably in scientific literature to describe the same bacterium. It is important to understand these synonyms to avoid confusion and ensure accurate communication within the fields of microbiology and veterinary medicine, especially when discussing research, diagnostics, and treatment strategies for diseases caused by the Spirillum of Gamaleia.