Table 3.
Influence of three autoinducer (AI-1, AI-2 and AI-3) QS systems on the expression of virulence factors in A. hydrophila.
| Autoinducer system | Virulence factors | Effect | Strains | Mutants | References |
|---|---|---|---|---|---|
| AI-1 | Exoprotease | + | A. hydrophila AH-1N | ΔahyI and ΔahyR | 18 |
| β-Haemolysin | − | ||||
| Biofilm | + | ΔahyI and ΔahyR | 92 | ||
| Proteases, amylase, Dnase, haemolysin and S-layer | + | A. hydrophila J-1 | ΔahyR | 93 | |
| T6SS(Hcp, VgrG), metallo-protease, biofilm | + | A. hydrophila{A. dhakensis} SSU | ΔahyRI and ΔahyR+ | 17,94 | |
| T3SS | + | A. hydrophila{A. piscicola} AH-3 | ΔahyI and ΔahyR | 69 | |
| Haemolysin | − | A. hydrophila ATCC 7966 | ΔahyI, ahyI-K7Q and ahyI-K7R | 95 | |
| Protease | + | ||||
| Biofilm, proteases, haemolysin, amylase and Dnase | + | A. hydrophila YJ-1 | ΔahyI | 96 | |
| AI-2 | Swimming motility | + | A. hydrophila {A.dhakensis} SSU | ΔluxS | 19 |
| Biofilm | − | ||||
| Biofilm, extracellular protease | + | A. hydrophila ATCC 7,966 | ΔluxS | 97 | |
| AI-3 | Motility, cytotoxic enterotoxin, haemolysin, protease | + | A. hydrophila {A. dhakensis} SSU | ΔqseB | 20,94 |
| Biofilm | − | ||||
| Biofilm, haemolysin | + | A. hydrophila NJ-35 | ΔqseC | 98 |
“+” represents upregulation, and “−” represents downregulation.