Table 4.
Survey of M. synoviae infection in a farm of Zhejiang in December 2013
| Flock | Week-old | Breed | Antibody of serum samples from breeder flockb | Infection proportion of M. synoviae in hatching embryosc | |||||
|---|---|---|---|---|---|---|---|---|---|
| Positive rate | AMna | CV | No. of sample | No. of positive | Infection proportion | Infection proportion of breed | |||
| 1001 | 24 W | San Huang | 100% | 5648 | 40 | 16 | 0/27 | 0.00% | 4.63% |
| 1002 | 29 W | San Huang | 100% | 8634 | 47.6 | 16 | 2/27 | 7.41% | |
| 1003 | 33 W | San Huang | 100% | 9265 | 48.2 | 16 | 1/24 | 4.20% | |
| 1004 | 39 W | San Huang | 100% | 10,944 | 40.8 | 16 | 2/30 | 6.67% | |
| 1005 | 30 W | Silky | 73.33% | 2770 | 83.3 | 16 | 3/29 | 10.34% | 9.25% |
| 1006 | 54 W | Silky | 100% | 16,693 | 39.7 | 16 | 2/25 | 8.00% | |
| 1007 | 35 W | Qingyuan Ma | 100% | 11,545 | 34.4 | 16 | 5/32 | 15.62% | 9.83% |
| 1008 | 47 W | Qingyuan Ma | 100% | 11,320 | 34.9 | 16 | 1/29 | 3.45% | |
a Arithmetic mean; bSerum samples were collected from the breeder flocks (1001–1008) on December 11, 2013 and detected by ELISA; c7–9 days-old embryos corresponding to the breeder flocks (1001–1008) were collected on December 20, 2013. Allantoic fluid was collected from embryos for M. synoviae antigen detection by PCR on December 20, 2013