TABLE 3

Antimicrobial resistance of nontyphoidal Salmonella enterica blood and stool isolates to clinically relevant antimicrobials, by serotype, 1984 to 2015a

Salmonella serovarIsolates from blood and stoolIsolates from bloodIsolates from stoolOdds of resistance to ≥1 antimicrobialb in blood compared to stool
nNo. (%) resistant to ≥1 antimicrobialnNo. (%) resistant to ≥1 antimicrobialnNo. (%) resistant to ≥1 antimicrobialOR (95% CI)P value
Typhimurium30,8903,502 (11.3)54375 (13.8)29,6823,342 (11.2)1.3 (1.0–1.6)0.063
Virchow1,700274 (16.1)14821 (14.1)1,474246 (16.6)0.8 (0.5–1.3)0.435
Enteritidis2,5301,298 (51.3)10854 (50.0)2,3401,217 (52.0)0.9 (0.6–1.4)0.683
Mississippi2,20528 (1.2)520 (0.0)2,01527 (1.3)Undefined
Panama142111 (78.1)3934 (87.1)9873 (74.4)2.3 (0.8–6.6)0.112
Bovismorbificans1,001112 (11.1)325 (15.6)92899 (10.6)1.6 (0.6–4.1)0.379
Dublin928 (8.6)305 (16.6)472 (4.2)4.5 (0.8–24.9)0.085
Heidelberg381100 (26.2)307 (23.3)33990 (26.5)0.8 (0.4–2.0)0.702
Infantis1,329108 (8.1)200 (0.0)1,23497 (7.8)Undefined
Saintpaul892103 (11.5)182 (11.1)83096 (11.5)1.0 (0.2–4.2)0.952
  • a Serovars listed are the 10 most-common isolates from blood; n, total number of isolates in the category; OR, odds ratio; 95% CI, 95% confidence interval.

  • b Resistance “to ≥1 antimicrobial” refers to tested antimicrobials.