Factors affecting lecithinase activity and production inClostridium welchii
نویسندگان
چکیده
منابع مشابه
Lecithinase production by gramnegative bacteria.
Lecithinase production by microorganisms has been investigated in an attempt to use it in the classification of bacteria, and to associate formation with toxicity and virulence. The first record of this reaction was made when Nagler (1939) and Seifert (1939) observed, independently, the formation of an opalescence in human serum by the a toxin of Clostridium perfringens. It was soon found that ...
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Maximum production of the alpha toxin by Cl. welchii is dependent on the inclusion in the medium of several substances in addition to those required for growth. These factors include: 1. Some substance present in enzymatic digests of certain proteins such as casein and gelatine. 2. Glycerylphosphorylcholine and other substances that are present in extracts of pancreas. 3. The use of starch or d...
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Lecithin has been found to interfere with the combining reaction of Cl. welchii alpha toxin (lecithinase) and its antitoxin. If the lecithinase is first brought into contact with lecithin, and the antitoxin is then added, the antitoxin fails to stop the enzymatic reaction, but gradually decelerates it. If the lecithinase is brought into contact with both lecithin and antitoxin at the same insta...
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Depue, Robert H. (Hahnemann Medical College, Philadelphia), and Albert G. Moat. Factors affecting aspartase activity. J. Bacteriol. 82:383-386. 1961.-Cells of Escherichia coli grown in a glucose-mineral salts medium contain about one-fifth the amount of aspartase activity observed in cells grown in a yeast extract-peptone medium. The aspartase activity of the cells grown in glucose-salts medium...
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ژورنال
عنوان ژورنال: Journal of Hygiene
سال: 1969
ISSN: 0022-1724
DOI: 10.1017/s002217240004153x