When comparing the HIV infected to the uninfected patients, the predictors of Acinetobacter colonisation/infection included younger age (p = 0.042), female gender (p = 0.028), CD4 count below 200 cells/ml (p = 0.037), an APACHE II score greater than 30 (p = 0.010), and MODS (p = 0.032); (Table 5). The gene discussed is CD4; the disease is infection.