. Spherical central Bulging of cell wall . Oval sub terminal . Oval terminal . Spherical terminal . Free spore
1.4. Classification of bacteria
Bacterial classification depends on the following characteristics.
1. 2. 3. 4. 5. 6 .
Morphology and arrangement Staining Cultural characteristics Biochemical reactions Antigenic structure Base composition of bacterial DNA
Morphology and staining of bacteria are the commonly used characteristics to classify bacteria.
1. Morphology of bacteria When bacteria are visualized under light microscope, the following morphology are seen. 1. Cocci (singular coccus): Round or oval bacteria measuring
about 0.5-1.0μmb in diameter.They are found insingle, pairs, chains or clusters.