However, a statistically significant difference in rate of any parasitic infection by type of diarrhea was observed in a CD4 category 200–499 cells/μl (acute diarrhea 26.2 % vs chronic diarrhea 45.2 %; χ2 = 4.99, df = 1, P = 0.03). The gene discussed is CD4; the disease is parasitic infectious disease.