Major contributions to the science of microbiology have spanned the time from the 17th century to the present day. The following is a list of prominent microbiologists who have made significant contributions to the study of microorganisms. Many of those listed have received a Nobel prize for their contributions to the field of microbiology. The others are typically considered historical figures whose work in microbiology had a notable impact in the field. Those microbiologists who currently work in the field have been excluded unless they have received recognition beyond that of being on the faculty in a college or university.