FIG. 5.

Swimming motility of V. parahaemolyticus mutant strains with flagellar switch or motor defects in M agar. Strains: 1, LM4657 (motA); 2, LM4661 (motB); 3, LM4170 (motX); 4, LM4171 (motY); 5, LM4811 (fliG); 6, LM4815 (fliM); 7, LM4812 (fliN); 8, LM1017; 9 and 10, LM1017; 11 and 12, LM4659 (motB2::TnphoA); 13 and 14, LM4289 (motY1719::TnphoA). Semisolid motility plates were incubated at 30°C for 8 (top) and 9.5 h (bottom). All mutant strains are derivatives of LM1017. Strain LM1017 fails to produce lateral flagella; therefore, there is no contribution to motility from the lateral motility system.