27.07.2012
Non-Typhoidal Salmonella: A total of 3,947 non-typhoidal Salmonella isolates were tested, consisting of 2,474 from humans, 400 from retail meats, and 1,073 from healthy food animals at slaughter. Among retail meats, Salmonella was isolated from 15% of ground turkey samples, 13% of chicken breast samples, 1.5% of pork chop samples, and 0.5% of ground beef samples. Serotype Frequencies: Some of the most common serotypes among isolates from humans were also common among food isolates, particularly isolates from poultry sources.
• Among isolates from humans, Enteritidis (21%), Typhimurium (15%), and Newport (12%) remained the three most common serotypes.
• The four most common serotypes among retail chicken breast isolates were Typhimurium (46%), Enteritidis (16%), Heidelberg (12%), and Kentucky (12%); the four most common serotypes among isolates from chickens at slaughter were Kentucky (43%), Enteritidis (27%), Typhimurium (10%), and Heidelberg (4.4%).
• Hadar and Saintpaul remained among the top three serotypes recovered from retail ground turkey (10% and 24% of retail ground turkey isolates, respectively) and from turkeys at slaughter (20% and 14% of turkey isolates, respectively). Serotypes Heidelberg and IIIa 18:z4,z23:- increased in prevalence from 2009, and were two of the top four serotypes isolated from retail ground turkey (8.4% and 11% of all serotypes, respectively) and turkeys at slaughter (9.3% and 7.3%, respectively).
Antimicrobila resistance: Ceftriaxone, an extended-spectrum cephalosporin, Ceftriaxone resistance was found in 35% of retail chicken breast isolates in 2010, after rising from 16% in 2007 to 38% in 2009. Typhimurium (81%) was the predominant serotype among these ceftriaxone-resistant isolates. Among retail ground turkey isolates, ceftriaxone resistance rose from 5.7% in 2009 to 16% in 2010, the highest since testing began in 2002. Among isolates from food animals at slaughter, resistance to ceftriaxone was 15% among isolates from turkeys, and 12% among isolates from chickens.
In 2010, 85% of isolates from humans had no resistance to any antimicrobial agents tested, an increase from 74% in 1999.
Campylobacter: A total of 2,136 Campylobacter isolates were tested, including 1,310 from humans, 518 from retail meats (505 from chicken breasts and 13 from ground turkey) and 308 from chickens at slaughter. Poultry are a major source of human C. jejuni infections.