Coaggregation between bacterial species

Autoaggregation and Coaggregation of Bacteria Associated with Acute Endodontic Infections

“…1b). These aggregates are analogous to the formation of "corn cobs" or "test tube brushes" in dental plaque (2,7).…”

“…The visual coaggregation assay, which provides semi-quantitative data, has been used to screen large number of strains for their ability to coaggregate because it is simple and rapid. The assay system is able to detect the adherence of approximately 10 9 bacterial cells (7). By using the visual coaggregation assay, it was shown that many bacteria in this study had a high tendency of autoaggregation.…”

“…The concentration of bacterial cells may affect the extent of coaggregation. Studies examining the relative concentration of bacterial cells have revealed that maximal levels of coaggregation are achieved with a cell ratio of approximately 1:1 (7). In this study, the bacteria were prepared to the optical density that related to cell concentration of 1 ϫ 10 9 cells/ml.…”

“…The visual assay is a semi-quantitative assay used to determine the extent of coaggregation. This assay is rapid and allows for the examination of a large number of reactions, making it the ideal system to screen for coaggregation species (7). Quantitative assays include microcoaggregation, filter-retention, and spectrophotometric assays.…”

Coaggregation Interactions Between Oral and Endodontic Enterococcus faecalis and Bacterial Species Isolated From Persistent Apical Periodontitis

“…Coaggregation was first described by Gibbons and Nygaard (23) who used the term interbacterial aggregation, as distinct from autoaggregation or the adherence of bacteria belonging to the same strain (24). Early investigations demonstrated that coaggregation between pairs of bacteria is highly specific and involves a lectin-like interaction, mediated by a protein adhesin and a carbohydrate receptor, often a polysaccharide (25).…”