Q. What is the difference between heterologous and homologous immunoglobulins?

Homologous immunoglobulin is the human from the same species immunoglobulin and In case of inoculation in animals as in veterinary procedures homologous immunoglobulin is that from the blood of animals of the similar species of the animal undergoing treatment but Heterologous immunoglobulin is that obtained from animals of different species from the individual into which it will be inoculated.

The homologous immunoglobulin is safer since it is collected from beings of the same species of the individual in which it will be inoculated and thus the risk of the antibodies to trigger an immune response is lower and to be recognized as foreign and Heterologous immunoglobulins are more prone to being destroyed by the own antibodies of the individual.