Table 3. Comparison of the sensitivity of different ELISA tests for detecting Cms bacterial cells.
Bacterial suspension (CFU/ml) | Loewea | Agdiab | Adgenc | Newly developed IgG | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Against mucoid Cms cells | Against nonmucoid Cms cells | |||||||||
527 | NCPPB 4053 | 527 | NCPPB 4053 | 527 | NCPPB 4053 | 527 | NCPPB 4053 | 527 | NCPPB 4053 | |
107 | + | + | + | + | - | + | + | + | + | + |
106 | + | + | - | + | - | + | (+) | + | + | + |
105 | - | + | - | + | - | + | - | + | + | + |
104 | - | + | - | (+) | - | - | - | + | + | (+) |
103 | - | (+) | - | - | - | - | - | - | - | - |
102 | - | - | - | - | - | - | - | - | - | - |
NC1 | - | - | - | - | - | - | - | - | - | - |
NC2 | - | - | - | - | - | - | - | - | - | - |
+ = positive result from ELISA (more than two-fold higher than the negative control)
(+) = weak positive (approximately two-fold higher than the negative control)
- = negative result from ELISA (less than two-fold higher than the negative control)
NC1—Negative control 1—Coating buffer
NC2—Negative control 2—Potato extract diluted 1:100 in coating buffer
aLoewe kit containing polyclonal goat primary IgG against the Cms strain NCPPB 2140 and polyclonal goat secondary IgG conjugated with AP enzyme, DAS-ELISA method
bAgdia kit containing monoclonal mouse primary IgG and polyclonal rabbit secondary IgG conjugated with alkaline phosphatase AP enzyme, DAS-ELISA method
cAdgen kit containing polyclonal primary IgG-anti Cms and polyclonal secondary IgG conjugated with AP enzyme, PTA-ELISA method