Volume 13, Number 11—November 2007
Human Multidrug-Resistant Salmonella Newport Infections, Wisconsin, 2003–2005
|Variable†||Infection, n (%)
||Odds ratio||p value|
|MDRAmpC‡ (n = 137)||Pansusceptible (n = 95)|
|Contact with cattle||20 (15)||0||UD||0.0001§|
|Farm residence or farm or petting zoo visit¶||14 (10)||0||UD||0.001§|
|Consumption of raw milk||10 (7)||0||UD||0.006#|
|Contact with horses||2 (2)||0||UD||0.514#|
|Foreign travel||0 (0)||1 (1)||0||0.409#|
|Contact with dead animal||1 (7)||0||UD||1.000#|
|Contact with pet reptile||0 (0)||7 (7)||0||0.002#|
*Salmonella Newport–multidrug-resistant AmpC (MDRAmpC) is resistant to at least chloramphenicol, streptomycin, sulfamethoxazole/sulfisoxazole, tetracycline, amoxicillin-clavulanic acid, ampicillin, cefoxitin, ceftiofur, and cephalothin and shows decreased susceptibility to ceftriaxone. Table includes case-patients with Newport-MDRAmpC and pansusceptible infections only. UD, undefined.
†A specific exposure period was not assessed except for travel. Other exposures reported for case-patients included eating raw ground beef (1 MDRAmpC), eating raw cookie dough (1 MDRAmpC and 1 pansusceptible), preparing a raw chicken pet diet (1 pansusceptible), contact with an ill family member (1 MDRAmpC and 1 pansusceptible), and attending a pig roast (6 MDRAmpC and 1 pansusceptible).
‡At least MDRAmpC resistant.
¶Exposure to farms and petting zoos was not explicitly assessed by the case reporting form. In all, 14 case-patients reported this exposure; all associated isolates were Newport-MDRAmpC.
#Fisher exact test.