Figure 3
From: Colostral antibody induced interference of inactivated bluetongue serotype-8 vaccines in calves
Kinetic of BTV antibody level in vaccinated calves as measured by VP7 cELISA. Results are expressed as mean of percentage of negativity (PN). A threshold value of 35 was defined to discriminate between positive (PN ≤ 35) and negative (PN > 45) cELISA results. Animals were sampled five times post-calving (S1 to 5). The mean age of the calves is given in days (d) in parenthesis for each sample. Calves were vaccinated at the mean age of 118 days (i.e. between S3 and 4). The group of calves that become seropositive after vaccination (strong responders) are indicated in dashed line. Mild and non responders groups are labeled using doted and plain line respectively.