[Survival of Salmonella paratyphi B and Pseudomonas aeruginosa in seawater after incubation or washing in the presence of osmolytes].
The authors have compared the survival in seawater of Salmonella paratyphi B and Pseudomonas aeruginosa cells grown at low or high osmolarity, in the presence of organic osmolytes: glycine betaine, choline, proline, and glutamate. The four substrates enhanced the survival potential of S. paratyphi B while only glycine betaine protected P. aeruginosa. In addition only S. paratyphi B cells were more resistant after a preliminary growth at high osmolarity. Both bacteria were sensitive to osmotic down-shock, sensitization of S. paratyphi B being inversely proportional (p greater than or equal to 0.01) to the osmolarity of the medium used to wash cells. The transit in wastewater, at low osmolarity, can therefore modify the behavior of these pathogens in the marine environment.
Faculté de pharmacie, Monastir, Tunisie.
A
A
Bakhrouf
M
M
Jeddi
M J
MJ
Gauthier
D001622:Betaine / Q000494:pharmacology; D002794:Choline / Q000494:pharmacology; D005971:Glutamates / Q000494:pharmacology; D018698:Glutamic Acid; D009997:Osmotic Pressure; D011392:Proline / Q000494:pharmacology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000254:growth & development* / Q000502:physiology; D012484:Salmonella paratyphi B / Q000187:drug effects / Q000254:growth & development* / Q000502:physiology; D012623:Seawater; D014871:Water Microbiology
D005971:Glutamates; D018698:Glutamic Acid; D001622:Betaine; D011392:Proline; D002794:Choline
Survie du Salmonella paratyphi B et du Pseudomonas aeruginosa dans l'eau de mer après incubation ou lavage en présence d'osmolytes.