Table 3.
Number of bees and the percentage of bees infected by N. ceranae at 7 days post-inoculation (p.i.).
| Infected Bees (7 Days p.i.) | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age Cohort | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |
| Group A | n | 30 | 30 | 24 | - | 30 | 30 | 30 | 30 | 21 | 30 | 30 | 30 | 30 | 30 | 30 | 19 * | - |
| qPCR+ | 30 | 29 | 24 | - | 30 | 30 | 30 | 30 | 21 | 30 | 30 | 30 | 30 | 30 | 30 | 19 | - | |
| % | 100 | 97 | 100 | - | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | - | |
| Group B | n | - | 10 | 10 | 10 | - | - | 10 | 10 | 10 | 10 | 10 | 10 | - | 10 | 10 | 10 | 10 |
| qPCR+ | - | 10 | 9 | 10 | - | - | 10 | 10 | 9 | 10 | 9 | 8 | - | 5 | 8 | 1 | 10 | |
| % | - | 100 | 90 | 100 | - | - | 100 | 100 | 90 | 100 | 90 | 80 | - | 50 | 80 | 10 | 100 | |
Group A, bees infected individually with N. ceranae spores; (*) n < 30 bees due to the high accumulated mortality of the bees at 7 days p.i. Group B, bees infected collectively with the same spores. All control bees analyzed (Group CA and Group CB) were negative for N. ceranae infection and they are not shown in the table. n: number of samples analyzed. qPCR +: indicates number of positive samples.