Although the typical concentration of lysozyme in serum is 2.8 ± 0.8 mg/L [10,11], its concentration in body fluids rises on the onset of several diseases such as AIDS [12], cancer [13], malaria [14], Alzheimer’s disease [15,16], meningitis [17], rheumatoid arthritis [18,19], sarcoidosis [11], and Crohn’s disease [20]. The gene discussed is LYZ; the disease is Crohn disease.