- Acinetobacter⁻
- Bacteroidetes-
- Clostridium+
- Enterococcus species+
- Escherichia coli⁻
- Staphylococcus species+
- Streptococcus+
- Methanobrevibacter smithii
* A negative sign (-) following the genus or species name indicates gram negative bacteria (which produce inflammatory lipopolysaccharide), whereas a positive sign indicates gram positive status.
* Methanobrevibacter smithii is an archaeon, not a bacterium, and therefore does not have a gram status.