THE CHEMOTAXIS AND ADHESION OF VIBRIO FLUVIALIS TO MUCUS OF PARALICHTHYS OLIVACEUS

The growth of Vibrio fluvialis in skin, gill and intestinal mucus of Paralichthys olivaceus, the chemotactic response and adhesion of V. fluvialis to the mucus were investigated. The results show that, V. fluvialis grew well in all the mucus in Logistice growth model at prophase and Gompertz growth model at anaphase, the maximum biomass yield in gill mucus was higher than those in skin and intestinal mucus; V. fluvialis exhibited strong chemotactic response towards the mucus from the three organs, the chemotaxis to gill mucus was significantly stronger than to skin mucus (P0.05), and extremely significant lower (P0.01) to intestinal mucus than those to gill mucus and skin mucus. The bacteria adhesion to skin mucus and gill mucus were significantly higher (P0.05) than that to intestinal mucus after incubation for 30, 60 and 90 min. Therefore, pathogenic V. fluvialis could grow and colonize in mucus of P. olivaceus, especially in gill mucus, causing further infection.