The antibiotics obtained from bacteria are:
1) Penicillin - Obtained from Penicillium notatum and Penicillium chrysogenum
2) Polymyxin-B - From Bacillus polymyxa
3) Cephalosporin - From Cephalosporin acremonium
4) Streptomycin and Neomycin - From Streptomyces griseus
5) Chloromycetin - Produced by Streptomyces venezuelae