TABLE 3.
Comparison of rectal swab and stool specimen results for Salmonella spp. grouped by diagnostic testing approachb
| Salmonella species-positive group | Specimen type | No. of specimens with the indicated result/total no. of specimens tested (%) |
||
|---|---|---|---|---|
| Luminex xTAG GPP positive | Culture positive | qPCR positive | ||
| GPP positive/culture positive | Stool | 34/38 (89.5) | 31/38 (81.6) | 36/38 (94.7) |
| Rectal swab | 36/43 (83.7) | 38/43 (88.4) | 39/43 (90.7) | |
| GPP positive/culture negative | Stool | 7/8 (87.5)a | 0/8 (0) | 0/8 (0) |
| Rectal swab | 3/9 (33.3)a | 0/9 (0) | 0/9 (0) | |
| GPP negative/culture positive | Stool | 0/5 (0) | 5/5 (100) | 1/5 (20.0) |
| Rectal swab | 0/12 (0) | 8/12 (66.7) | 4/12 (33.3) | |
a
P = 0.05. No other comparisons achieved statistical significance.
b
GPP, gastrointestinal pathogen panel; qPCR, quantitative PCR.