Abstract:
This disclosure describes four new antibacterial agents designated LL-C08078.alpha..sub.1, LL-C08078.alpha..sub.2, LL-C08078.alpha..sub.3 and LL-C08078.beta. produced in a microbiological fermentation under controlled conditions using a new strain of a new species of the genus Streptomyces called Streptomyces majorciensis Labeda, sp. nov., and mutants thereof. These new antibacterial agents are active against a variety of microorganisms and thus are useful in inhibiting the growth of such bacteria wherever they may be found. In addition, these agents are active as growth promotants in warm-blooded animals.
Abstract:
Antibiotic LL-D42067.alpha. derived by aerobic fermentation of the microorganism Actinomadura madurae subspecies simaoensis NRRL 15734, useful as an antibacterial and antiparasitic agent.
Abstract:
This disclosure describes four new antibacterial agents designated LL-CO8078.alpha..sub.1, LL-CO8078.alpha..sub.2, LL-CO8078.alpha..sub.3 and LL-CO8078.beta. produced in a microbiological fermentation under controlled conditions using a new strain of a new species of the genus Streptomyces called Streptomyces majorciensis Labeda, sp. nov., and mutants thereof. These new antibacterial agents are active against a variety of microorganisms and thus are useful in inhibiting the growth of such bacteria wherever they may be found. In addition, these agents are active as growth promotants in warm-blooded animals.
Abstract:
This disclosure describes a novel class of antibiotics, three of which have been designed AM31.alpha., AM31.beta., and AM31.gamma. and are produced in a microbiological fermentation under controlled conditions using a new strain of Streptoverticillium netropsis.
Abstract:
Disclosed herein are novel peptides and protected peptides. These compounds can be derived from naturally occurring peptides, such as those selected from colistin, circulin A, polymyxin A, polymyxin B, polymyxin D, octapeptin B, octapeptin C, and [Ile7]polymyxin B1. Also disclosed are pharmaceutical compositions containing the new peptides, as well as methods for preparing the novel peptides and protected peptides.
Abstract:
The present invention provides laspartomycin core peptides, laspartomycin core peptide derivatives, antimicrobial laspartomycin derivatives, methods for making laspartomycin core peptides, methods for making laspartomycin core peptide derivatives, methods for making antimicrobial laspartomycin derivatives, pharmaceutical compositions of antimicrobial laspartomycin derivatives, methods of inhibiting microbial growth and methods for treating and/or preventing microbial infections in a subject.
Abstract:
Derivatives of antibiotics derived from the microorganism Streptomyces lydicus subspecies tanzanius, referred to as antibiotics LL-E19020 alpha and beta, are produced by chemical reaction. The derivatives are also active antibiotics useful in the treatment of bacterial infections.
Abstract:
A biologically pure culture of Micromonospora purpureochromogenes ssp. Wuxiensis and its use in an aerobic fermentation process to produce the antibacterial and antiparasitic agent LL-D42067.alpha..
Abstract:
The invention is a process for the production by fermentation of the antibacterial and antiparasitic agents designated LL-D42067.alpha., to methods for its recovery and concentration from crude solutions and to processes for its purification. The invention includes within its scope the biologically pure culture of the antibiotic.
Abstract:
This invention relates to antibiotic LL-E19020.alpha. and LL-E19020.beta. derived from the microorganism Streptomyces lydicus subspecies tanzanius NRRL 18036, which are useful as an antibacterial agent.