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Table 1 Serology of chickens challenged with velogenic NDV strain Herts following vaccination with live-attenuated NDV vaccine

From: Engineered recombinant protein products of the avian paramyxovirus type-1 nucleocapsid and phosphoprotein genes for serological diagnosis

DPC

Group

Serological assays

Commercial

NDV iELISA

HI

iELISA-NPct

iELISA-Pu

iELISA-Vu

0 DPC

vaccinated

8/101

8/10

9/10

9/10

2/10

control

0/6

0/6

0/6

0/6

0/6

3 DPC

vaccinated

9/10

9/10

9/10

7/10

2/10

control

0/6

0/6

0/6

0/6

0/6

7 DPC

vaccinated

10/10

10/10

10/10

8/10

7/10

control

4/4

4/4

4/4

2/4

2/4

14 DPC

vaccinated

10/10

10/10

10/10

8/10

7/10

control

4/4

4/4

4/4

4/4

4/4

21 DPC

vaccinated

9/9

8/9

9/9

8/9

7/9

control

4/4

4/4

4/4

4/4

4/4

28 DPC

vaccinated

6/6

5/6

6/6

4/6

4/6

control

4/4

4/4

4/4

4/4

2/4

  1. Vaccinated group – Ten chickens each were vaccinated with NDV strain “Clone 30”
  2. Control group – Six chickens did not receive vaccination before challenge
  3. DPC – days postchallenge; challenge infection with NDV strain Herts33 was carried out on day 21 post vaccination, i.e. day 0 DPC characterizes the status at day 21 post vaccination
  4. HI – hemagglutination inhibition assay against NDV LaSota antigen
  5. 1N/M – numbers of seropositive/total chickens
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Virology Journal

ISSN: 1743-422X