The CD9-GFP-transfected macrophages showed a significant reduction in MNGC formation (approximately 40%) for both CDC272 and E264 strains of B. thailandensis compared to WT or GFP-transfected J774.2 cells (Fig. 8A), although neither of the transfected cells differed in susceptibility to infection compared with wild-type J774.2 macrophages (Fig. 8B). The gene discussed is CD9; the disease is infection.