How was animal testing used in the past?

Answer 1

The earliest references to animal testing are found in the writings of the Greeks in the 2nd and 4th centuries BCE. Aristotle (Αριστοτέλης) (384-322 BCE) and Erasistratus (304-258 BCE) were among the first to perform experiments on living animals.[14] Galen, a physician in 2nd-century Rome, dissected pigs and goats, and is known as the "father of vivisection."[15] Avenzoar, an Arabic physician in 12th-century Moorish Spain who also practiced dissection, introduced animal testing as an experimental method of testing surgical procedures before applying them to human patients.[16][17]

Animals have been used repeatedly through the history of biomedical research. The founders, in 1831, of the Dublin Zoo-the fourth oldest zoo in Europe, after Vienna, Paris, and London-were members of the medical profession, interested in studying the animals both while they were alive and when they were dead.[18] In the 1880s, Louis Pasteur convincingly demonstrated the germ theory of medicine by inducing anthrax in sheep.[19] In the 1890s, Ivan Pavlov famously used dogs to describe classical conditioning.[20] Insulin was first isolated from dogs in 1922, and revolutionized the treatment of Diabetes.[21] On November 3, 1957, a Russian dog, Laika, became the first of many animals to orbit the earth. In the 1970s, antibiotic treatments and vaccines for leprosy were developed using armadillos,[22] then given to humans.[23] The ability of humans to change the genetics of animals took a large step forwards in 1974 when Rudolf Jaenisch was able to produce the first transgenic mammal, by integrating DNA from the SV40 virus into the genome of mice.[24] This genetic research progressed rapidly and, in 1996, Dolly the sheep was born, the first mammal to be cloned from an adult cell.[25]

Toxicology testing became important in the 20th century. In the 19th century, laws regulating drugs were more relaxed. For example, in the U.S., the government could only ban a drug after a company had been prosecuted for selling products that harmed customers. However, in response to the Elixir Sulfanilamide disaster of 1937 in which the eponymous drug killed more than 100 users, the U.S. congress passed laws that required safety testing of drugs on animals before they could be marketed. Other countries enacted similar legislation.[26] In the 1960s, in reaction to the Thalidomide tragedy, further laws were passed requiring safety testing on pregnant animals before a drug can be sold.[27]