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Index
»
MCPH 4
»
Antimicrobial Agents
»
Sources of Antimicrobials
level: Sources of Antimicrobials
Questions and Answers List
level questions: Sources of Antimicrobials
Question
Answer
Examples of gram positive rods
Bacillus subtilis Bacillus polymyxa
Examples of ACTINOMYCETES
Streptomyces nodosus Streptomyces venezuelae Streptomyces aureofaciens Streptomyces erythraeus Streptomyces fradiae Streptomyces griseus Micromonospora purpureae
Examples of FUNGI
Cephalosporium spp. Penicillium grisofulvum Penicillium notatum
Source of Bacitracin
Bacillus subtilis
Source of Polymyxin
Bacillus polymyxa
Source of Amphotericin B
Streptomyces nodosus
Source of Chloramphenicol
Streptomyces venezuelae
Source of Chlortetracycline
Streptomyces aureofaciens
Source of Erythromycin
Streptomyces erythraeus
Source of Neomycin
Streptomyces fradiae
Source of Streptomycin
Streptomyces griseus
Source of Gentamicin
Micromonospora purpureae
Source of Cephalothin
Cephalosporium spp.
Source of Griseofulvin
Penicillium grisofulvum
Source of Penicillin
Penicillium notatum
• It is easy to find or develop drugs that are effective against what cells?
Prokaryotic cells
• Defined as the range of different microorganisms that an antibiotic or antimicrobial agent inhibits or kills them
Antimicrobial Spectrum
• These are antimicrobial agents showing efficacy against gram-positive and gram-negative bacteria strains
Broad spectrum
• If the antimicrobial agent is only effective against either gram-positive or gram-negative
Narrow spectrum
• Arises when the growth of the target pathogen that has developed resistance to the antibiotic
Superinfection
The action of Antimicrobial activity
• Bactericidal • Bacteriostatic
• Agents that can totally kill microbes
Bactericidal
• Can only inhibit the growth
Bacteriostatic