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Titolo:
BIOFILM DEVELOPMENT AND SANITIZER INACTIVATION OF LISTERIA-MONOCYTOGENES AND SALMONELLA-TYPHIMURIUM ON STAINLESS-STEEL AND BUNA-N RUBBER
Autore:
RONNER AB; WONG ACL;
Indirizzi:
UNIV WISCONSIN,INST FOOD RES,DEPT FOOD MICROBIOL & TOXICOL,1925 WILLOW DR MADISON WI 53706 UNIV WISCONSIN,INST FOOD RES,DEPT FOOD MICROBIOL & TOXICOL,1925 WILLOW DR MADISON WI 53706
Titolo Testata:
Journal of food protection
fascicolo: 9, volume: 56, anno: 1993,
pagine: 750 - 758
SICI:
0362-028X(1993)56:9<750:BDASIO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PSEUDOMONAS-AERUGINOSA; BACTERIAL ATTACHMENT; SURFACES; HYPOCHLORITE; DESTRUCTION; RESISTANCE; AGENTS; GROWTH; HEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
A.B. Ronner e A.C.L. Wong, "BIOFILM DEVELOPMENT AND SANITIZER INACTIVATION OF LISTERIA-MONOCYTOGENES AND SALMONELLA-TYPHIMURIUM ON STAINLESS-STEEL AND BUNA-N RUBBER", Journal of food protection, 56(9), 1993, pp. 750-758

Abstract

Biofilm formation by seven strains of Listeria monocytogenes and one strain of Salmonella typhimurium on stainless steel and Buna-n rubber was examined under two nutrient conditions. The type of surface, nutrient level, and organism influenced biofilm development and production of extracellular materials. Buna-n had a strong bacteriostatic effect on L monocytogenes, and biofilm formation on Buna-n under low nutrientconditions was reduced for four of the seven strains tested. Buna-n was less bacteriostatic toward S. typhimurium. It inhibited the growth of several other pathogens to varying degrees. An ethylene propylene diamine monomer rubber was less inhibitory than Buna-n, and Viton rubber had no effect. The effectiveness of sanitizers on biofilm bacteria was examined. Biofilms were challenged with four types of detergent andnondetergent sanitizers. Resistance to sanitizers was strongly influenced by the type of surface. Bacterial biofilm populations on stainless steel were reduced 3-5 log by all the sanitizers, but those on Buna-n were resistant to these sanitizers and were reduced less than 1-2 log. In contrast, planktonic (suspended) bacteria were reduced 7-8 log by these sanitizers. Chlorine and anionic acid sanitizers generally removed extracellular materials from biofilms better than iodine and quaternary ammonium detergent sanitizers. Scanning electron microscopy demonstrated that biofilm cells and extracellular matrices could remain on sanitized surfaces from which no viable cells were recovered.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 14:52:44