Figure 1

Correlation of positive humoral immune response and the age of dogs. The graph displays the predicted probability for one or more positive antibody test results in the 90 dogs regarding the dog’s age at the beginning of the study. When dogs within this certain population reach the age of 3.4 years, there is a 50% chance for those dogs to have a positive antibody test result. At the age of 8.3 years the probability rises up to 90%.