Abstract
A relatively simple procedure is described for obtaining germfree piglets which does not involve hysterectomy or hysterotomy. Newborn pigs were delivered into an isolator and their freedom from microbial contamination was ensured by applying bactericidal solutions externally and a combination of antibiotics in solution per os. 40 piglets so derived have been maintained free from detectable micro-organisms, some for up to 140 days. Equipment is described which allowed the long-term holding of these animals so that nutritional balance studies could be completed.