Background: Salmonella enterica subsp. enterica serovar Hadar (antigenic formula 6,8:z10:e,n,x) is a serovar of the O:8 (C2-C3) serogroup. S. Hadar is a very common serovar in the U.S. and Europe; associated with turkey and other birds, it is commonly found in ground turkey and chicken meat. In Europe this serovar emerged in the 1971. In England, for example, before 1971 were only eight human cases reported, but by 1979 a total of 1,600 salmonellosis human cases were confirmed to be caused by S. Hadar. Â Consequent to the S. Hadar emergence, a phage typing scheme was developed, this included 35 recognized phage types. In 2011 an outbreak associated with turkey burgers occurred in the U.S., the outbreak strain showed resistance antibiotic to several antibiotics typically used to treat salmonellosis (ampicillin, amoxicillin/clavulanate, cephalothin, and tetracycline).
...