Table 2. Targeted screening for known honey bee pathogens using PCR or RT PCR as appropriate.
Weak colonies (≤5 combs of bees) | Strong colonies (>5 combs bees) | ||||||
---|---|---|---|---|---|---|---|
Pathogen | No. positive samples | % positive | No. positive samples | % positive | Positive predictor | Sensitivity | Specificity |
2007 | |||||||
DWV | 65 (17) | 56.5 (51.5) | 47 (8) | 33.8 (11.8) | 58 (68.0) | 56.5 (51.5) | 66.2 (88.2) |
N. ceranae | 54 | 47 | 61 | 43.9 | 47 | 47 | 56.1 |
N. apis | 23 | 20 | 15 | 10.8 | 60.5 | 20 | 89.2 |
BQCV | 21 (1) | 18.3 (3.0) | 25 (3) | 18 (4.4) | 45.7 (25.0) | 18.3 (3.0) | 82 (95.6) |
CBPV | 19 | 16.5 | 22 | 15.8 | 46.3 | 16.5 | 84.2 |
A. woodi | 11 | 9.6 | 13 | 9.4 | 45.8 | 9.6 | 90.6 |
SBV | 5 | 4.3 | 5 | 3.6 | 50 | 4.3 | 96.4 |
KBV | 1 | 0.9 | 0 | 0 | 100 | 0.9 | 100 |
ABPV | 0 | 0 | 1 | 0.7 | 0 | 0 | 99.3 |
AIV | 0 | 0 | 0 | 0 | - | 0 | 100 |
IAPV | 0 | 0 | 0 | 0 | - | 0 | 100 |
2008 | |||||||
DWV | 71 (19) | 79.8 (67.9) | 31 (21) | 49.2 (40.4) | 69.6 (47.5) | 79.8 (67.9) | 50.8 (59.6) |
BQCV | 57 (16) | 64 (57.1) | 37 (19) | 58.7 (36.5) | 60.6 (45.7) | 64 (57.1) | 41.3 (63.5) |
N. apis | 48 | 53.9 | 37 | 58.7 | 56.5 | 53.9 | 41.3 |
N. ceranae | 32 | 36 | 21 | 33.3 | 60.4 | 36 | 66.7 |
SBV | 5 (1) | 5.6 (3.6) | 1 (1) | 1.6 (1.9) | 83.3 (50.0) | 5.6 (3.6) | 98.4 (98.1) |
M. plutonius | 6 | 6.7 | 1 | 1.6 | 85.7 | 6.7 | 98.4 |
CBPV | 2 (1) | 2.2 (3.6) | 1 (1) | 1.6 (1.9) | 66.7 (50.0) | 2.2 (3.6) | 98.4 (98.1) |
KBV | 1 | 1.1 | 1 | 1.6 | 50 | 1.1 | 98.4 |
APBV | 0 | 0 | 1 | 1.6 | 0 | 0 | 98.4 |
AIV | 0 | 0 | 0 | 0 | - | 0 | 100 |
IAPV | 0 | 0 | 0 | 0 | - | 0 | 100 |