Definition

Noun: A yellow-green mixture of antibiotics obtained from the bacillus of green pus (Pseudomonas aeruginosa). It was one of the first commercially available antibiotic preparations.

Usage

• Pyocyanase is used as a historical term in medicine and microbiology. It refers specifically to the early antimicrobial substance derived from cultures.
• It is typically used in academic or historical contexts when discussing the history of antibiotics.

Examples

• The discovery of pyocyanase in the late 19th century preceded the widespread use of penicillin.
• Early studies on pyocyanase provided important insights into bacterial antagonism.
• Due to its toxicity and instability, pyocyanase was not a successful therapeutic agent.

Advanced Usage

• The term is primarily used in historical discourse. For example: "The era of antibiotic therapy can be traced back to substances like pyocyanase."
• It may appear in scientific literature reviewing the evolution of antimicrobial drugs.

Variants and Related Words

• Pyocyanin (noun): A blue-green phenazine pigment produced by , which is a component of the mixture historically called pyocyanase. It has antimicrobial properties itself.
• Antibiotic (noun): A more general term for a substance produced by a microorganism that inhibits the growth of other microorganisms.

Synonyms

• Early antibiotic preparation
• Historical antimicrobial mixture

Notes on Meaning

This word has a very specific and narrow meaning. It does not refer to modern, purified antibiotics. Its use is almost exclusively confined to discussions about the history of medicine and microbiology.

Noun

1. a yellow-green mixture of antibiotics obtained from the bacillus of green pus