Hektoen Enteric Agar (HE) is for the selective isolation and differentiation of pathogenic Gram negative enteric bacteria, such as the non-lactose fermenting Salmonella spp. and Shigella spp. Normal stool flora, such as E. coli, will be partially inhibited. Polystyrene Petri plates feature raised rings for stacking ability and prevents sliding. Packaged in sleeves of 10 plates in a "breathable" cellulose bag that prevents build-up of condensation and excess moisture. 15x100mm Plate. Hardy Diagnostics® G63.