Dear student,
1) world's first antibiotic medicine 'penicillin' is obtained from penicillium by Alexander Fleming.
2) He is known as 'Father of microbiology'. he gave 'germ theory of disease' and also gave method of pasteurisation of milk.
3) He is founder of modern Bacteriology (study of bacteria). He identified the specific causative agents of tuberculosis, cholera,and anthrax and gave experimental support for the concept of infectious disease.
Regards