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Titolo:
SODIUM-CHLORIDE, POTASSIUM-CHLORIDE, AND VIRULENCE IN LISTERIA-MONOCYTOGENES
Autore:
MYERS ER; DALLMIER AW; MARTIN SE;
Indirizzi:
UNIV ILLINOIS,DEPT FOOD SCI,569 BEVIER HALL,905 S GOODWIN AVE URBANA IL 61801 UNIV ILLINOIS,DEPT FOOD SCI,569 BEVIER HALL,905 S GOODWIN AVE URBANA IL 61801 GREAT LAKES CHEM CORP W LAFAYETTE IN 47906
Titolo Testata:
Applied and environmental microbiology
fascicolo: 7, volume: 59, anno: 1993,
pagine: 2082 - 2086
SICI:
0099-2240(1993)59:7<2082:SPAVIL>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPEROXIDE-DISMUTASE; GROWTH; HEMOLYSIN; CATALASE; MICE; TEMPERATURE; INFECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
E.R. Myers et al., "SODIUM-CHLORIDE, POTASSIUM-CHLORIDE, AND VIRULENCE IN LISTERIA-MONOCYTOGENES", Applied and environmental microbiology, 59(7), 1993, pp. 2082-2086

Abstract

Virulence, as determined in a mouse model, and the virulence factor activities of catalase, superoxide dismutase, and listeriolysin O were examined in a parental strain (10403S) and in a nonhemolytic mutant strain (DP-L224) of Listeria monocytogenes. The cells were propagated inmedia containing various concentrations of sodium chloride or potassium chloride. Strains 10403S and DP-L224 exhibited significant increases in catalase activity and listeriolysin O activity when grown in medium containing either salt at 428 mM. The superoxide dismutase activities for both strains increased when they were grown in medium containing either salt. The superoxide dismutase activity was significantly increased only when cells were propagated in medium containing no salt compared with that when they were propagated in medium containing eithersalt at 1,112 mM. In addition, the listeriolysin O activity was highest for cells propagated in medium containing KCl at 428 mM, while the activity was significantly less for cells propagated in medium containing NaCl at an equal concentration. Virulence was examined in mouse livers and spleens after intravenous infection, and approximate 50% lethal doses were determined after intragastric and intraperitoneal infection. Each method of infection indicated that listeriolysin O is required for virulence, while growth in salt-containing medium or the production of higher levels of catalase, superoxide dismutase, and listeriolysin O do not appear to enhance the virulence of L. monocytogenes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 21:32:28