What is bactiria omnavior?

It seems there might be a typo in your question, as "bactiria omnavior" does not correspond to any known term in microbiology or related fields. If you meant "bacteria" in general, they are single-celled organisms that can be found in various environments, playing crucial roles in processes like decomposition and nutrient cycling. If you're referring to a specific type of bacteria or a concept, please provide more details for clarification.