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Table 4 Serum anti – aMPV IgY antibody level after aMPV vaccination a of turkeys

From: Development of vaccine-induced immunity against TRT in turkeys depends remarkably on the level of maternal antibodies and the age of birds on the day of vaccination

   Mean S/P-ratio ± S.D. b at days post aMPV/A vaccination
Experiment Group 0 3 7 14
I MDA+0/V (1:500)c 2.19 ± 1.87 0.9 ± 0.51* 0.57 ± 0.5 0.23 ± 0.16
  MDA+0/NV (1:500) 2.19 ± 1.87 1.9 ± 1.36 0.6 ± 0.62 0.41 ± 0.36
III MDA-0/V (1:100) 0.001 ± 0.00 0.006 ± 0.01 0.015 ± 0.017 0.179 ± 0.164**
  MDA-0/NV (1:100) 0.001 ± 0.00 0.005 ± 0.005 0.005 ± 0.008 0.00 ± 0.00
II MDA+14/V (1:100) 0.598 ± 0.492 0.42 ± 0.361 0.21 ± 0.200 0.307 ± 0.217*
  MDA+14/NV (1:100) 0.598 ± 0.492 0.423 ± 0.345 0.228 ± 0.242 0.140 ± 0.116
IV MDA-14/V (1:100) 0.00 ± 0.00 0.014 ± 0.038 0.034 ± 0.055* 0.123 ± 0.194*
  MDA-14/NV (1:100) 0.00 ± 0.00 0.00 ± 0.00 0.00 ± 0.00 0.00 ± 0.00
  1. aIn all experiments vaccinated birds were inoculated oculonassaly with 104 TCID50 of live attenuated aMPV/A vaccine.
  2. b15 samples of serum were analyzed per group.
  3. cSample dilution for ELISA procedure.
  4. */**Significant difference in mean (S/P)-ratio of vaccinated birds in comparison to the not vaccinated group (U-test, *as p < 0,05 and **as p < 0,01).