Relation of colonial morphologies of strain Ac-0119 of Acinetobacter anitratus in a soft-agar medium and its variants to morphological and biological properties.
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概要
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Using strain Ac-0119 of <I>Acinetobacter anitratus</I> isolated from clinical specimens, relation of capsule and pili production, mouse virulence and growth type in soft-agar medium was investigated and following results were obtained.<BR>The parent strain showed large round colonial morphology in a soft-agar medium and produced large mucoid colonies on BTB agar plate. The organisms possessed small capsule and no pili was observed either under electronmicroscope or haemagglutination reaction.<BR>Varaiant-A exhibited feather like growth type in soft-agar medium and growned small mucoid colonies on BTB agar plate. This variant small colonies depending upon the organismus and no pili was demonstrated.<BR>Variant-B exhibited streaming-type colonial morphology in a soft-agar and non-mucoid colonies were formed on BTB agar plate. With this variant, no capusule was observed, however, pili was shown by a negative staining method although the haemagglutination reaction was negative.<BR>Variant-C showed compact type growth in a soft-agar medium and produced small non-mucoid colonies on BTB agar plate. With this variant, neither capsule nor pili were observed by et an electronmicroscope. Mouse virulence of the parent strain and its variants was higher in order of the parent strain and the variants, A, B and C and no mouse was killed even with 108 cells of the variant C.
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The Japanese Association for Infectious Diseases | 論文
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