The Filtrable Forms of Bacteria: I. A Filtrable Stage in the Life History of the Shiga Dysentry Bacillus

Hadley, Philip B.; Delves, Edna; Klimek, John W.

doi:10.1093/infdis/48.1.1

Cited by 73 publications

(29 citation statements)

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“…These observations were foreshadowed, in a notable manner, by Hadley, Delves & Klimek (1931 ) who recognized the progression S-R-G (gonidial) in several types of bacteria, and remarked upon the resemblance of the G-form, now called the L-form, to the organism of bovine pleuropneumonia. Hadley 's studies were, however, curiously neglected, and when the same resemblance between the L-colonies of Streptobacillus moniliformis and the pleuropneumonia organism was again noticed by Klieneberger (1935), the earlier observations were forgotten by subsequent workers.…”

Section: Discussionmentioning

confidence: 92%

Evidence that Streptobacillus moniliformis is an Intermediate Stage between a Corynebacterium and its L-form or Derived PPLO

Pease

1962

Journal of General Microbiology

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SUMMARYMorphological and serological evidence is presented to demonstrate that an organism morphologically identical with StreptobaciElus moniliformis is a stage intermediate to the L-form of a strain of Corynebacterium cervicis, that it is serologically closely related to a type culture of S . moniliformis, as well as to strains of MycopEasma hominis; thus supporting the conclusion that L l , derived from S. moniliformis, and M . hominis have a similar origin, and suggesting that S . moniliformis is an intermediate stage between a corynebacterium resembling C . cervicis and an L-form.

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Section: Discussionmentioning

confidence: 92%

Evidence that Streptobacillus moniliformis is an Intermediate Stage between a Corynebacterium and its L-form or Derived PPLO

Pease

1962

Journal of General Microbiology

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“…The most controversial property of the G organisms is the question of their passage through bacteriological filters. They have been reported by some (2,9,15,24,25,28) to be filterable, but others (12,14,16,21,26,27,30,31,33) have not been able to demonstrate this characteristic.…”

Section: Review Of Literaturementioning

confidence: 94%

“…However, some investigators (2, 3) report no cross agglutination and others (11,24) state that antisera prepared against G cultures do not agglutinate parent cultures, whereas antisera prepared against parent cultures agglutinate both parent and G cultures. Most investigators (2,9,12,41) have reported the G cultures to be nonvirulent; others (18,24,26,32) report a decrease in virulence; whereas Hadley and Carapetian (15) found an increase in virulence. Heat resistance of G colonies is increased or decreased (9,21,22).…”

Section: Review Of Literaturementioning

confidence: 99%

The Influence of Antibiotics on the Origin of Small Colonies (G Variants), of Micrococcus Pyogenes var. Aureus1

Wise¹,

Spink²

1954

J. Clin. Invest.

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“…The term G colony (Hadley, Delves & Klimek, 1931), sometimes used in association with small colony variants, does not seem appropriate since it was originally used to describe small colony variants thought to reproduce by gonidia. …”

Section: Methicillin-resistant Staphylococci 321mentioning

confidence: 99%

Methicillin-Resistant Staphylococci: Genetics of the Minority Population

Seligman¹

1966

Journal of General Microbiology

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SUMMARYA methicillin-resistant strain of Staphylococcus aweus (no. 5982) contained cocci with d8ering intrinsic resistances to methicillin. Most of the population was slightly more resistant than a typical methicillin-sensitive staphylococcal isolate, but a few were mutants with ability to grow a t markedly increased concentrations of methicillin (500 ,ug./ml. or more). Penicillinase production was not essential for methicillin resistance since a penicillinase-negative variant of strain 5982 was able to produce penicillinase-negative strains with high degrees of methicillin resistance. Methicillin-sensitive strains also gave rise to mutants with increased intrinsic resistance to methicillin, but, in the mutants from methicillin-resistant strains, the increase in resistance was much greater. The mutants were characteristically slower growing than the wild type. Many were small colony variants which reverted to the parent type when passed in liquid media. With 5 yo NaC1-methicillin plates strain 5982 exhibited a phenotypic increase in resistance. On such plates a few L-type colonies were produced at high concentrations of methicillin.

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The Filtrable Forms of Bacteria: I. A Filtrable Stage in the Life History of the Shiga Dysentry Bacillus

Cited by 73 publications

References 0 publications

Evidence that Streptobacillus moniliformis is an Intermediate Stage between a Corynebacterium and its L-form or Derived PPLO

Evidence that Streptobacillus moniliformis is an Intermediate Stage between a Corynebacterium and its L-form or Derived PPLO

The Influence of Antibiotics on the Origin of Small Colonies (G Variants), of Micrococcus Pyogenes var. Aureus1

Methicillin-Resistant Staphylococci: Genetics of the Minority Population

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