Predisposed means having a natural tendency or inclination towards something, often due to genetic or environmental factors. It can also refer to being predisposed to behave in a certain way because of past experiences or beliefs.
It is hypothesized that in genetically predisposed people of all ages, gluten stimulates an inappropriate T cell - mediated autoimmune response in the intestinal submucosa that results in destruction of mucosal enterocytes. (forkoffgluten.com)
Other infections in cats, such as those caused by the feline leukemia virus or feline immunodeficiency virus, are not predisposing factors. (forpetssakeveterinarycenter.com)
Here are some ideas if you have an allergy dog or a genetically predisposed breed: (theblessedpetshop.com)