The relationship between glycogen synthesis, biofilm formation and virulence in salmonella enteritidis.
FEMS Microbiol Lett
; 191(1): 31-6, 2000 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-11004396
ABSTRACT
Salmonella enteritidis accumulated large quantities of intracellular polysaccharide when grown in unrestricted nutrient conditions. Dense, abundant cytoplasmic granules were observed by electron microscopy in sections stained by the periodic acid-chlorite technique, indicating that the polysaccharide was of the glycogen type. When biofilm-producing S. enteritidis was pre-incubated in media containing increasing levels of glucose concentration, the levels of both cytoplasmic glycogen and biofilm rose correlatively to a point where a ceiling effect was observed. Studies carried out with activators and inhibitors of glycogen biosynthesis confirmed that biofilm was formed from glycogen cell stores. On the other hand, the virulence of the biofilm-producing strain in infected chickens increased proportionally to the amount of stored glycogen, suggesting a possible role of the glycogen depot in the virulence of S. enteritidis.
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Base de dados:
MEDLINE
Assunto principal:
Salmonella enteritidis
/
Biofilmes
/
Glicogênio
Limite:
Animals
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article