摘要:

Three strains of unidentified clostridia and 15 known strains ofClostridium glycolicumwere examined to investigate cross reactions with the latex particle agglutination reagent used to identifyClostridium difficile.The unknown strains were identified asCl. glycolicumand cross reacting agglutination occurred in 15/15 (100%) stockCl. glycolicumstrains. Characteristics such as volatile fatty acid profile, propylene glycol fermentation, u.v. fluorescence and the production ofp‐cresol are required to distinguish between the two specie

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00247.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

A lactoperoxidase system activated by glucose oxidase was bacteriostatic toListeria monocytogenesinoculated into UHT milk supplemented with glucose. The incorporation of urea peroxide as an additional hydrogen peroxide‐generating agent did not enhance the inhibitory effec

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00248.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Calcium alginate‐immobilized lactic acid bacteria (LAB) were used to acidify milk and re‐utilized for five successive fermentations. The yeastKluyveromyces marxianuswas added to the milk in order to simulate contamination of the bioreactor. Growth of the yeast was studied over the successive re‐utilizations of the immobilized LAB. When the system was contaminated only in the first fermentation, the yeast population decreased in the successive re‐utilizations; rinsing of the system following each fermentation was effective in further reducing yeast contamination. Yeast population increased only when contaminants were added at the beginning of each fermentation. Presence of yeast in the system did not influence acidification rate of the immobilized LAB or cell release from the alginat

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00249.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Escherichia coligrown in broth initially at pH 5.0 (pH 5.0‐grown organisms) survived exposure to inorganic acid or to acid pH plus organic acid which prevented subsequent growth by pH 7.0‐grown organisms. This resistance of pH 5.0‐grown organisms to organic acids was observed at acid pH with lactic, propionic, benzoic, sorbic, trans‐cinnamic and acetic acids. Such resistance might allow acid‐habituated organisms to survive in acid foods or at body sites such as the urinary tract where organic acids are present a

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00250.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Acid and alkaline phosphatase activities of microbial films colonizing glass surfaces were studied. Films developed in water with a high organic content were characterized by a high ratio of alkaline to acid phosphatase activity. Alkaline phosphatase activity of these films was enhanced by a period of prior heating at 60°C for 10 min. Microbial films developed in poorer water exhibited higher proportions of acid phosphatases and heat treatment had a less favourable effect on the alkaline phosphatase activity

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00251.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

The inhibitory effect of low levels of novobiocin on the growth ofEscherichia coliwas greatly enhanced by the presence of cationic compounds which alone produced no inhibitory effect. Diaminoacetone and spermidine were the most effective enhancers of the novobiocin effect, but N‐(2‐pyrimidinyl)‐piperazine, methylglyoxyl‐bis‐(guanylhydrazone), agmatine, 3,3‐diamino benzidine and 3‐amino benzamidine also produced marked enhancement. There was slightly less effect of 4,5,6‐triamino pyrimidine, pyridoxamine and 1,4‐diamino piperazine whilst 1,3‐diamino guanidine, moroxydine, tetra methylp‐phenylene diamine and 1,4‐diamino‐2‐butanone were essentially ineffective as enhancers of novobiocin inhibition. It is suggested that the effective agents aid the penetration of novobiocin

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00252.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Book reviewed in this article:Parasitology inFocus: Facts andTrends(1988). Edited by H. Mehlman.ColourAtlas for theDiagnosis ofBacterialPathogens inAnimals(1988). Edited by W. Bisping&G. Amtsberg.Role ofGutFlora inToxicity andCancer(1988). By I.R. Rowland.AnaerobesToday(1988). Edited by J.M. Hardie&S.P. Bordello.TheRelease ofGenetically‐EngineeredMicro‐Organisms(1988). Edited by M. Sussman, C.H. Collins, F.A. Skinner&D.E. Stewart‐Tull.MicrobialTechnology in theDevelopingWorld(1988). Edited by E.J. Dasilva, Y.R. Dommergues, E.J. Nyns&C. Ratledge.MicrobialLipidsVolume 1 (1988). Edited by C. Ratledge&S.G. Wilk

ISSN:0266-8254    

DOI:10.1111/j.1472-765X.1989.tb00253.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY