What to do if i discovered a new antibiotic producing streptomycete?

New antibiotics: The world desperately needs new antibiotics. If you think you've made a discovery, then you might want to obtain a provisional application for a patent. This will give you a filing date with the U.S. Patent and Trademark Office (USPTO) and gives you protection under the law. You may want to contact a lawyer or some patent service - sounds like your discovery could be "patent pending."