Unusual Types of Bacteria (Part 3)

. Actinomycetes

Actinomycetes are gram-positive filamentous bacteria characterized by mycelial growth (i.e., branching filaments), which is analogous to fungal growth. However, the diameter of the filaments is similar in size to bacteria (approximately 1 mm). Most actinomycetes are strict aerobes, but a few of them require anaerobic conditions. Most of these microorganisms produce spores, and their taxonomy is based on these reproductive structures (e.g., single spores in Micromonospora or chains of spores in Streptomyces). They are commonly found in water, wastewater treatment plants, and soils (with preference for neutral and alkaline soils). Some of them (e.g., Streptomyces) produce a

Pipetting

a) Take a sterile pipette, open the wrapper and put the rubber valve

b) Fuel burned edges on the Bunsen for a few seconds. Do not be too long because it can damage the tip of the pipette

c) Take the tube containing the bacterial culture,

open the lid with both ring and little fingers while the index finger, middle finger and thumb holding pipette.

d) Immediately insert the pipette into a test tube, rubber suction valve press the [S] (see figure below) and then immediately remove it. When inserting the pipe t try not to touch the walls of the tubes and Bunsen burners do in the near