TABLE 1

Nontyphoidal Salmonella enterica serovars associated with clinically relevant antimicrobial resistance

Antimicrobial resistance class and Salmonella serovarNo. (%) of nonsusceptible/total no. of isolatesAdjusteda OR (95% CI)P value
Multidrug resistanceb (1984-2015)
    Panama108/142 (76.1)46.9 (31.7–69.5)<0.001
    Blockley104/140 (74.3)51.3 (34.8–75.7)<0.001
    Kentucky76/106 (71.7)33.5 (21.8–51.5)<0.001
    Rissen68/107 (63.6)23.7 (15.9–35.4)<0.001
    Schwarzengrund72/114 (63.2)21.8 (14.8–32.2)<0.001
    Salmonella 4,[5],12:i:−588/801 (73.4)48.9 (41.1–58.2)<0.001
    Corvallis101/240 (42.1)9.2 (7.1–12)<0.001
    All S. enterica serovars3,615/54,451 (6.64)
Ciprofloxacin nonsusceptible (1994-2015)
    Schwarzengrund81/102 (79.4)74.6 (44.6–124.9)<0.001
    Corvallis180/240 (75.0)51.6 (38.3–69.6)<0.001
    Kentucky59/80 (73.8)55.6 (32.3–95.7)<0.001
    Blockley27/38 (71.1)173.2 (75.5–397.2)<0.001
    Hadar155/309 (50.2)67.1 (49.6–90.8)<0.001
    Enteritidis848/2,406 (35.2)17.1 (15.5–19.0)<0.001
    Braenderup35/125 (28.0)6.5 (4.3–9.6)<0.001
    Give24/96 (25.0)7.8 (4.8–12.6)<0.001
    Rissen14/98 (14.3)2.8 (1.6–5.1)<0.001
    Agona56/408 (13.7)3.6 (2.7–4.9)<0.001
    Stanley62/654 (9.5)1.8 (1.4–2.4)<0.001
    Montevideo14/172 (8.1)1.8 (1.1–3.2)0.032
    Virchow76/1,509 (8.1)1.8 (1.1–3.2)0.049
    All S. enterica isolates2,197/45,071 (4.9)
Cephalosporin nonsusceptible (2001-2015)
    Salmonella 4,[5],12:i:−40/800 (5.0)7.9 (5.5–11.5)<0.001
    Corvallis7/240 (2.9)5.1 (2.4–11)<0.001
    Rissen2/84 (2.4)3.7 (0.9–15.1)0.072
    Stanley11/577 (1.9)3.3 (1.8–6.1)<0.001
    Saintpaul8/626 (1.3)2.4 (1.2–5)0.015
    All S. enterica isolates204/34,294 (0.6)
  • a Adjusted for year.

  • b Nonsusceptible to three or more classes of antimicrobials; serovars with MDR prevalence of >30% are listed.