Composite FISH micrographs of activated sludge from a lab-scale reactor. “Ca. Propionivibrio aalborgensis” cells appear white having hybridized with Prop207(green), PAOmix(red) and EUBmix (blue); “Ca. Accumulibacter sp.” appear magenta with their cells hybridizing the PAOmix and EUBmix probes ets; all other cells hybridized with EUB mix only and appear blue. Scale bar represents 20 microns. - Source:1Autotroph/Mixotroph
The Propionivibrio are suggested to behave as typical GAO in EBPR systems. This is supported by their storage of volatile fatty acids as PHA under anaerobic conditions without excess polyphosphate storage 1. Most of the isolates of the Propionivibrio genus are anaerobic to aero-tolerant and have a fermentative metabolism producing propionate and acetate as characteristic metabolic end products 2 3 4. However, Propionivibrio militaris has a strictly respiratory metabolism, utilizing various substrates that include acetate and propionate 5.
Prop207 targets the species "Ca. Propionivibrio aalborgensis" only. However, this appears to represent the abundant species in full-scale systems and the probe is therefore considered relevant for coverage of the genus in activated sludge 1.
 Albertsen, McIlroy, Stokholm-Bjerregaard, Karst, Nielsen - "Candidatus Propionivibrio aalborgensis": A Novel Glycogen Accumulating Organism Abundant in Full-Scale Enhanced Biological Phosphorus Removal Plants. - Front Microbiol 7(): 1033. doi:10.3389/fmicb.2016.01033
 Tanaka, K., Nakamura, K., Mikami, E. (1990) Fermentation of maleate by a Gram-negative strictly anaerobic non-spore-former, Propionivibrio dicarboxylicus gen. nov., sp. nov. Archives of Microbiology. 154(4): 323-328. - Tanaka Et Al 1990 -
 Brune, Ludwig, Schink - Propionivibrio limicola sp. nov., a fermentative bacterium specialized in the degradation of hydroaromatic compounds, reclassification of Propionibacter pelophilus as Propionivibrio pelophilus comb. nov. and amended description of the genus Propionivibrio. - Int. J. Syst. Evol. Microbiol. 52(Pt 2): 441-4. doi:10.1099/00207713-52-2-441
 Meijer, Nienhuis-Kuiper, Hansen - Fermentative bacteria from estuarine mud: phylogenetic position of Acidaminobacter hydrogenoformans and description of a new type of gram-negative, propionigenic bacterium as Propionibacter pelophilus gen. nov., sp. nov. - Int. J. Syst. Bacteriol. 49 Pt 3(): 1039-44. doi:10.1099/00207713-49-3-1039
 - From the Centers for Disease Control. Change of dosing regimen for malaria prophylaxis with mefloquine. - JAMA 265(7): 849.