Composite FISH micrograph of members of the family ABS-19 (probe Acido-819) in full-scale sludge. Target cells in FISH micrograph overlays appear magenta [target probe (Cy3 = red) + EUBmix (Cy5 = blue)] and non-target blue (EUBmix only). Scale bar = 20 microns. - Source:1
Novel phylotype with no known associated physiological information. FISH probes have been designed that cover both the Kaga01 and p7o14 phylotypes (both members of the family ABS-19). FISH-Microautoradiography has been applied to characterise these organisms, although no positive results were obtained making it difficult to draw conclusions about their activities 1. Cells are observed as small rods distributed throughout the floc.
Acido-819 covers this group along with p7o14 1
 McIlroy, Awata, Nierychlo, Albertsen, Kindaichi, Nielsen, et al. - Characterization of the In Situ Ecophysiology of Novel Phylotypes in Nutrient Removal Activated Sludge Treatment Plants. - PLoS ONE 10(9): e0136424. doi:10.1371/journal.pone.0136424