Tap hole and spout bacteria

[Userj8670]

Does anyone know the specific name of the bacteria(s) that contaminate our spouts (those of us on gravity buckets) and work to close the tap hole? This bacteria is also the same bacteria that would be found on the drop ends as well?

Appreciate any help!

[DrTimPerkins]

The predominant microbe in maple sap and tapholes is Pseudomonas (an extremely common bacteria), but there are many many different types of microbes (bacteria, yeast, fungi, molds, etc.) and species of each type that exist in maple sap/tapholes.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC383098/