title: Epidemiological value of the gamma-glutamyltransferase test in Salmonella typhimurium.
abstract: The simple and rapid method of Giammanco et al. (1980) has been used for the detection of the gamma-glutamyltransferase (gamma-GT) by means of a chromogenic substrate in 803 endemic and epidemic strains of Salmonella typhimurium from Southern Italy. About 20% of the strains have been proved gamma-GT negative. Both in endemic and epidemic isolates, negative and positive strains were respectively belonging to different phage types. The reported data suggest that the presence or absence of the gamma-GT in S. typhimurium is an epidemiological marker quickly and easily detectable by the described chromogenic test.
authors.forename: A
authors.initials: A
authors.lastname: Nastasi
authors.forename: M F
authors.initials: MF
authors.lastname: Massenti
authors.forename: S
authors.initials: S
authors.lastname: Pignato
mesh_terms: D002863:Chromogenic Compounds; D004196:Disease Outbreaks; D004812:Epidemiologic Methods; D006801:Humans; D012478:Salmonella Food Poisoning / Q000175:diagnosis; D012486:Salmonella typhimurium / Q000201:enzymology*; D005723:gamma-Glutamyltransferase / Q000032:analysis*
chemical_list: D002863:Chromogenic Compounds; D005723:gamma-Glutamyltransferase