TABLE 1.
Comparison of the primary enrichment, delayed secondary enrichment, and PCR results
| Flock/sample no. | Result (+ or −)a
|
Serotype isolated | ||
|---|---|---|---|---|
| PE | DSE | PCR | ||
| A/1 | + | + | + | Enteritidisb |
| A/2 | + | + | − | Enteritidis |
| A/3 | + | + | + | Enteritidis |
| A/4 | + | + | − | Enteritidis |
| A/5 | + | + | + | Enteritidis |
| A/6 | + | + | + | Enteritidis |
| A/7 | + | + | + | Enteritidis |
| A/8 | + | + | − | Enteritidis |
| A/9 | − | + | − | Enteritidis |
| A/10 | − | + | + | Enteritidis |
| A/11 | + | + | − | Enteritidis |
| A/12 | − | − | + | NDc |
| A/13 | + | − | + | Enteritidis |
| A/14 | − | + | − | Enteritidis |
| A/15 | − | + | − | Enteritidis |
| A/16 | + | + | + | Enteritidis |
| A/17 | − | + | − | Enteritidis |
| A/18 | + | + | + | Enteritidis |
| A/19 | − | + | − | Enteritidis |
| A/20 | + | + | + | Enteritidis |
| A/21 | + | + | + | Enteritidis |
| B/22 | + | + | + | Enteritidis |
| B/23 | + | + | + | Enteritidis |
| B/24 | + | + | + | Enteritidis |
| B/25 | + | + | + | Enteritidis |
| B/26 | + | + | + | Enteritidis |
| B/27 | + | + | + | Enteritidis |
| B/28 | + | + | + | Enteritidis |
| B/29 | + | + | + | Enteritidis |
| C/30 | + | + | + | Serogroup C1 |
| C/31 | + | + | + | Serogroup C1 |
| C/32 | + | + | + | Serogroup C1 |
| C/33 | + | + | + | Serogroup C1 |
| C/34 | − | + | − | Serogroup C1 |
| C/35 | − | + | − | Serogroup C1 |
| C/36 | − | + | − | Serogroup C1 |
| C/37 | − | + | − | Serogroup C1 |
| C/38 | − | + | − | Serogroup C1 |
| C/39 | − | + | − | Serogroup C1 |
| C/40 | − | + | − | Serogroup C1 |
| C/41 | − | + | − | Serogroup C1 |
| C/42 | − | + | − | Serogroup C1 |
| D/43 | − | − | + | ND |
| D/44 | − | + | + | Enteritidis |
| D/45 | − | − | + | ND |
| D/46 | − | − | + | ND |
| D/47 | + | + | + | Enteritidis |
| D/48 | − | − | + | ND |
| D/49 | − | − | + | ND |
| E/50 | + | + | + | Enteritidis |
| E/51 | − | + | + | Enteritidis |
| E/52 | + | + | + | Enteritidis |
| E/53 | + | + | + | Enteritidis |
| Total no. of positive samples | 30 | 46 | 35 | |
a
For PE and DSE results, + indicates that Salmonella colonies were observed after plating; − indicates that no Salmonella growth was observed after plating. For PCR results, + indicates that a specific PCR product was detected; − indicates that a specific PCR product was not detected.
b
Salmonella enterica serovar Enteritidis.
c
ND, not determined.