title: Lysogenic phage in Salmonella enterica serovar heidelberg (Salmonella Heidelberg): implications for organism tracing.
abstract: A phage typing system using a group of 11 closely related phage (as judged by Southern analysis and restriction fragment length polymorphism analysis) was able to distinguish at least six phage types in Salmonella heidelberg of human and animal origin. Restriction fragment length polymorphism analysis using cosmid probes from S. heidelberg confirmed that most S. heidelberg isolates belong to a single 'clonal' group. Southern analysis using DNA isolated from each of the testing phage group showed that phage types 4, 5 and 6 carry closely related endogenous or lysogenic phage. Induction of a lysogenic phage Hlp-4 (Heidelberg lysogenic phage) from type 4 could become lysogenic and convert phage types 1 and 3 to phage type 4 and phage type 5 to a non-typable phenotype.
authors.affiliation: Division of Clinical Microbiology, Institute of Medical and Veterinary Science, Adelaide, Australia.
authors.forename: D
authors.initials: D
authors.lastname: Harvey
authors.forename: C
authors.initials: C
authors.lastname: Harrington
authors.forename: M W
authors.initials: MW
authors.lastname: Heuzenroeder
authors.forename: C
authors.initials: C
authors.lastname: Murray
mesh_terms: D001434:Bacteriophage Typing; D003360:Cosmids; D004279:DNA, Viral / Q000235:genetics; D008242:Lysogeny; D012150:Polymorphism, Restriction Fragment Length; D012475:Salmonella / Q000145:classification*; D012483:Salmonella Phages / Q000235:genetics* / Q000502:physiology; D013045:Species Specificity
chemical_list: D004279:DNA, Viral