Flagellar morphology of Vibrio parahaemolyticus(Fujino et al)Sakazaki,Iwanami and Fukumi 1963

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  • YABUUCHI Eiko
    Research Insti-tute for Microbial Diseases, Osaka University
  • MIWATANI Toshio
    Department of Microbiology, Kansai Medical School Department of Bacteriology and Serology, Research Institute far Microbial Diseases, Osaka University
  • TAKEDA Yoshifumi
    Department of Microbiology, Kansai Medical School Department of Bacteriology and Serology, Research Institute far Microbial Diseases, Osaka University
  • ARITA Michiko
    Department of Microbiology, Kansai Medical School Department of Bacteriology and Serology, Research Institute far Microbial Diseases, Osaka University

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タイトル別名
  • Flagellar Morphology of Vibrio parahaemolyticus(Fujino et al) Sakazaki, Iwananzi and Fukumi 1963
  • Flagellar Morphology of <i>Vibrio parahaemolyticus</i> (Fujino et al) Sakazaki, Iwanami and Fukumi 19631

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The flagellar morphology of 88 Vibrio parahaemolyticus strains, including a strain descended from Fujino's original strain EB101 (= ATCC17802=KM1339) was studied. EB101 and 83 other strains (95%) showed mixed polar and peritrichous type of flagellation when grown on modified MOF (MMOF) agar after 16-hr incubation at 20 C. Cultures containing numerous peritrichous cells showed wiggly movements in moist preparations and rapidly spreading growth in semisolid agar plates. Peritrichous flagella were easily removed mechanically from the soma. The mean wavelengths of polar and peritrichous flagella were 2.53 μm (normal type) and 1.72 μm (atypical curly type) respectively. Peritrichous cells on solid media appeared after incubation for 2.5 hr at 37 C and 7 hr at 20 C. Overnight incubation at 37 C and acidity of the medium due to fermentation of carbohydrate markedly ruined peritrichous flagella. Electron micrograph of cells grown on MMOF agar revealed a sheathed polar flagellum and unsheathed peritrichous flagella. A hook structure was demonstrated at the proximal end of the latter. Polar monotrichous cultures in MMOF broth sometimes contained some cells having several or many peritrichous flagella of atypical curly type. Seven strains of Vibrio cholerae were exclusively polar monotrichous on solid and in liquid media. The flagellation of V. parahaemolyticus is concluded as being a mixed polar-peritrichous type. This fact would indicate that V. parahaemolyticus should be excluded from the genus Vibrio, since the genus Vibrio was defined as polar monotrichous.

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