What is a test tube stab?

A test tube stab is a microbiological technique used to inoculate a test tube containing solid media, typically agar, by inserting a sterile tool, such as an inoculating needle, into the medium. This method allows for the growth of microorganisms in a specific area, facilitating the observation of colony characteristics and behaviors. It is commonly used for isolating pure cultures or for studying the oxygen requirements of different microorganisms.