Counting bacteria

Counting bacteria

Fig. 1. In surface spreading 0.1 ml is distributed with a sterile spreader on the solid agar in this case mCCDA [Image: Moa Skarin & Ingrid Hansson (BVF, SLU)]. - Click on the image to enlarge it.

Counting bacteria

Fig. 2. Pour plating. In this sample VRBG is used for quantification of bacteria belonging to family Enterobacteriaceae. [Image: Tomasz Dzieciolowski, Ingrid Hansson & Karl-Erik Johansson (BVF, SLU)] - Click on the image to enlarge it.

Bacteria can be counted in different ways, and here are three fundamentally different methods: