Features attributable to growth and division.One of the first observable features of growth and division among staphylococci is the onset of septation, which, as seen in thin-section TEM, is a visible growth of wall material into the cytoplasm (Fig. 3A). This septum will continue its inward growth (like the closing of a camera aperture) until a cross-wall is formed that completely separates the two daughter cells (Fig. 3B to D).