Genetic Factors
•Uno direct evidence in humans
•Uthose that inherit certain MHC alleles have higher probability of developing diseases
•HLA allele
•Disease                              
•Relative risk
•NOTE:  Relative risk is the Atimes higher@ the risk compared to normal population
•DR4
•B27
•DR2
•DR3
•DR3/DQW8
•pemphigus vulgaris -
•blistering skin disorder
•5
•Ankylosing spondylitis
•90
•Goodpasture=s syndrome
•16
•Myasthenia gravis
•10
•Diabetes mellitus
•100