When a known filamentous bacteria does not form a bulking filament. A case to explain phenotype vs genotype.
If you were to watch a dog show, it is easy to be astonished by the differences in size, color, shape, and overall appearance of dogs. All the contestants are from the same species, or same genotype. What is different is the outward characteristics or phenotype. While dogs are a great example, every living species has some variation in appearance which is phenotypical variation.
Now to filamentous bacteria in wastewater. Some filamentous bacteria can also exhibit non-filamentous growth or life stages. It is only under certain conditions such as low dissolved oxygen or low nutrients that we get the change into filamentous growth patterns. We have been doing work on S. natans which is known to be responsible for many filamentous bulking events. However we are finding S. natans in non-filamentous growth form. This is a microbial example of the same genotype - which reads the same under DNA testing - having a very different outward appearance or phenotype. Other problematic organisms such as Nocardia can also exhibit the same switch from beneficial growth into problem forms under varying environmental conditions.
With our continued DNA based microbial community analysis and qPCR MLSS testing, Aster Bio's Environmental Genomics platform is giving our customers a deep understanding of how genotype and phenotype changes in MLSS can effect wastewater treatment efficiency.
Erik Rumbaugh has been involved in biological waste treatment for over 20 years. He has worked with industrial and municipal wastewater facilities to ensure optimal performance of their treatment systems. He is a founder of Aster Bio (www.asterbio.com) specializing in biological waste treatment.
Click to set custom HTML