Nippon Saikingaku Zasshi
Online ISSN : 1882-4110
Print ISSN : 0021-4930
ISSN-L : 0021-4930
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Volume 35, Issue 5
Displaying 1-3 of 3 articles from this issue
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  • Role of Cyclic AMP in Bacterial physiology
    Advances of research scince 1973
    Takeshi YOKOTA
    1980 Volume 35 Issue 5 Pages 673-689
    Published: September 25, 1980
    Released on J-STAGE: February 19, 2009
    DOIhttps://doi.org/10.3412/jsb.35.673
    JOURNAL FREE ACCESS
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  • Variety of β-lactam supersensitive mutants of Escherichia coli K-12
    Kazuo OKUMURA
    1980 Volume 35 Issue 5 Pages 691-699
    Published: September 25, 1980
    Released on J-STAGE: February 19, 2009
    DOIhttps://doi.org/10.3412/jsb.35.691
    JOURNAL FREE ACCESS
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    Escherichia coli K-12 strain C600 was mutagenized by treatment with nitrosoguanidine (NTG). The resulting mutants were selected by replicaplating as supersensitive clones against CXM or CER.
    The mutant clones were examined for the MICs to other β-lactams and SM, and for nutritional requirements. Clones manifesting supersensitivities to β-lactam antibiotics and retaining the same SM-sensitivity and nutritional requirements as those of the parent C600 strain were defined as β-lactam-supersensitive mutants.
    The following results were obtained.
    1) Twenty-six β-lactam-supersensitive mutants were confirmed in NTG-treated 5, 000 clones examined.
    2) They were classified into 4 groups. Group I was supersensitive to CXM and MCIPC but not to others. Group II was supersensitive to cephalosporins, except CXM, but not to any penicillin. Group III was supersensitive to all β-lactams. Group IV was untypable.
    3) One of four group I mutants lacked penicillin-binding protein (PBP) fraction 4. Two of four group II mutants lacked or decreased in PBP fraction 1Bs accompanied with some increase in amount of PBP fraction 1A and/or 2 and 5. Whereas, no changes were observed in the electrophoretic pattern of PBPs of the group III mutants.
    4) It was concluded that the machanism of β-lactam-supersensitive mutation was complicated, even though the occurrence changes in PBPs was confirmed to be one of the causes of the mutation.
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  • Analysis of Antigens of Vibrio parahaemolyticus Strains Possessing New O- and K-Antigens
    Masanori ISHIBASHI, Yoshio KINOSHITA, Yoshiaki YANAI, Hisao ABE, Yoshi ...
    1980 Volume 35 Issue 5 Pages 701-706
    Published: September 25, 1980
    Released on J-STAGE: February 19, 2009
    DOIhttps://doi.org/10.3412/jsb.35.701
    JOURNAL FREE ACCESS
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    O- and K-antigens of 3 strains of Vibrio parahaemolyticus isolated from patients with acute diarrhea who had returned home from the Philippines and 2 strains isolated in Bangladesh were analyzed. It was found that all the strains possessed new O-antigen. The K-antigens of the 5 strains were different from the 58 K-antigens already reported. Moreover, there was a difference in K-antigen between the Philippine and Bangladesh strains.
    The new O- and K-antigen of V. parahaemolyticus AQ-3206 (a strain from the Philippines) were designated O-AQO1 and K-AQK1, respectively. Antigenic type O-AQO1: K-AQK1 was proposed as a new antigenic type of V. parahaemolyticus.
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