You could have an infection caused by bacteria, yeast, or viruses. Chemicals in soaps, sprays, or even clothing that come in contact with this area could be irritating the delicate skin and tissues. It's not always easy to figure out what's going on, though.
They produce over two-thirds of the clinically useful antibiotics of natural origin (e.g., neomycin, cypemycin, grisemycin, bottromycins and chloramphenicol). The now uncommonly used streptomycin takes its name directly from Streptomyces.treptomyces is the largest antibiotic-producing genus, producing antibacterial, antifungal, and antiparasitic drugs, and also a wide range of other bioactive compounds, such as immunosuppressants.
Penicillin is produced by strains of the fungus Penicillium notatum and P. chrysogenum. Most of the other antibiotics in clinical use are produced by actinomycetes, particularly streptomycetes (natural antibiotics). Other antibiotics are produced by chemical synthesis (synthetic antibiotics).etracyclines tetracycline, any of a group of antibiotics produced by bacteria of the genus Streptomyces. They are effective against a wide range of Gram positive and Gram negative bacteria, interfering with protein synthesis in these microorganisms (see Gram's stain)...... Click the link for more information.