| occurrence of salmonella enterica serotype typhimurium dt104a in retail ground beef. | surveillance data of cattle and human isolates of salmonella enterica serovar typhimurium dt104 indicate that this pathogen emerged worldwide in the 1980s, particularly in cattle. studies were conducted to determine the prevalence of salmonella typhimurium dt104 in ground beef. samples were also tested for the presence of generic escherichia coli. a total of 404 fresh ground beef samples obtained at retail stores from new york, san francisco, philadelphia, denver, atlanta, houston, and chicago w ... | 2002 | 11848574 |
| an enhanced discriminatory pulsed-field gel electrophoresis scheme for subtyping salmonella serotypes heidelberg, kentucky, saintpaul, and hadar. | conventional pulsed-field gel electrophoresis (pfge) protocols, used extensively as a successful approach for subtyping many salmonellae, may be inadequate for discriminating strains sharing levels of homogeneity within the same serotype. four additional restriction enzymes (spei, paci, sfii, and noti), in addition to xbai and blni, were used in pfge typing of 33 salmonella heidelberg, 27 salmonella kentucky, 27 salmonella saintpaul, and 27 salmonella hadar isolates that were recovered from poul ... | 2008 | 18939754 |