Rare Breeds Canada Rare Breeds Canada Rare Breeds Canada (RBC) is a Canadian non-profit organization dedicated to preserving rare breeds of Canadian livestock. The organization was founded in 1987. It focuses on the rare breeds of livestock originating in Canada, including varieties of horses, sheep, pigs, chickens and cows. RBC publishes a Rare Breeds Priority List that separates livestock breeds into "critical", "endangered", "vulnerable", "at risk" and "recovering" categories. To assist with the preservation of these breeds, RBC coordinates a breeding program which uses host farms to manage small breeding groups which are used to build new flocks of animals. As the new
Animal trypanosomiasis some breeds of cattle, notably the N'Dama – a West African "Bos taurus" breed. This contrasts with the susceptibility shown by East African "Bos indicus" cattle such as the zebu. Most trypanosomes develop in tsetse flies (Glossina spp.), in its biological vector, about one to a few weeks. When an infected tsetse fly bites an animal, the parasites are transmitted through its saliva. It can also be spread by fomites such as surgical instruments, needles, syringes. The most important vectors are thought to be horseflies (Tabanidae) and stable flies (Stomoxys spp.). The immune response of animals could be unable to