Colicin typing of Shigella sonnei isolated in Northern Taiwan

Eighty-eight strains of Shigella sonnei isolated in northern Taiwan during the period of 1970-1974, were studied for their colicin types by a modified method of Abbott and Shannon. As a result, 67(76%) typable and 21(24%) non-typable strains were found. The prevalent colicin types of S. sonnei in northern Taiwan were types 15(52%) and 6(15%), followed by types 8(3%), 11(3%) and 12(3%). Other types were not found.