Bacterial Identification

Bacterial identification in laboratories relies on various methods, including microscopy (in fresh preparations or after staining), the observation of growth characteristics on specific culture media, biochemical reactions to organic and inorganic compounds (e.g., using the API system), and advanced molecular techniques.

The following figures present decision-making algorithms designed to streamline bacterial identification.

The following figures illustrate decision algorithms to facilitate bacterial identification .


Identification of Gram positive bacilli


Identification of Gram positive bacilli

Identification of Gram-positive Cocci


Identification of Gram-positive Cocci

Identification of positive ONPG Enterobacteriaceae


Identification of positive ONPG Enterobacteriaceae

Identification of negative ONPG Enterobacteriaceae


Identification of negative ONPG Enterobacteriaceae

Identification des Cocci + Cat +


 Cocci