We have isolated three freshwater bacterial strains that demonstrate the ability to degrade Giardia intestinalis cysts. These strains have been identified by 16S rRNA sequencing and phylogenetic analysis as belonging to the Flavobacterium columnare clade of the Cytophaga-Flavobacterium group. While the cyst degradation mechanism is unclear, two different effects on the cysts were observed: non-...

The aim of the present work was to evaluate several methods for analyzing the viability of bacteria after antibacterial photocatalytic treatment. Colony-forming unit (CFU) counting, metabolic activity assays based on resazurin and phenol red and the Live/Dead® BacLight™ bacterial viability assay (Live/Dead staining) were employed to assess photocatalytically treated Staphylococcus epidermidis a...

34 Because of the tradition of using honey as an antimicrobial medicament, we investigated 35 the effect of natural honey (NH) on Streptococcus mutans growth, viability and biofilm 36 formation compared to an artificial honey (AH). AH contained the sugars at the concentrations 37 reported for NH. NH and AH concentrations were obtained by serial dilution with tryptic soy 38 broth (TSB). Several ...