Studien zur Salmonellagruppe (Paratyphus-B-Gruppe)

Seiffert, G.

doi:10.1007/bf02227893

Cited by 8 publications

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“…We have in fact never met with any organism which was agglutinated beyond the above limit by a paratyphoid (B) (or Gaertner) serum, unless its cultural and fermentation characters corresponded in all respects with those bacilli. These results entirely confirm those of Morgan (1907), Seiffert (1909), Savage (1909), Williams, Rundle and, Murray (1910), as opposed to those of Conradi (1909), Gaethgens (1907) and Prigge and Sachs-Muke (1909). There is no reason to suppose that the differences in the technique adopted by different writers for the isolation of this group of bacilli account for these conflicting results.…”

Section: Methods Employedsupporting

confidence: 80%

“…In Germany, however, both Uhlenhuth (1908) and Seiffert (1909) have obtained B. suipestifer from the alimentary canal of the pig in a fair percentage of cases; and the strains Nos. 10, 11 and 12 of our series, which were isolated from apparently healthy food by German workers, were identical with standard strains of B. suipestifer.…”

Section: Methods Employedmentioning

confidence: 99%

“…They have also been obtained from the intestinal contents of healthy pigs by Uhlenhuth (1908) (8 O/o) and by Seiffert (1909) …”

Section: Distribution In Manmentioning

confidence: 99%

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On the Paratyphoid Group of Bacilli

Bainbridge

O'Brien

1911

J. Hyg.

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1. The term “paratyphoid group of bacilli” has been confined in the present enquiry to those strains which in their cultural characters and agglutination reactions are indistinguishable from B. suipestifer and B. paratyphosus (B). B. enteritidis Gaertner and B. paratyphosus (A) are excluded.2. The strains of bacilli belonging to the “paratyphoid” group can be separated into two classes by means of the absorption method, namely one group identical with recognised, standard strains of B. suipestifer and one identical with standard strains of B. paratyphosus (B); and we regard these two bacilli as separate organisms.3. In our experience, B. suipestifer has been found only in food or in outbreaks of acute illness attributable to food-poisoning, whereas B. paratyphosus (B) has been found in cases of paratyphoid fever or in persistent paratyphoid “carriers.”.4. We are disposed to put forward the suggestion indicated by these observations, that these two organisms have a different distribution in nature, the normal habitat of B. suipestifer being the alimentary canal of the pig (and other animals) and of food derived from such animals, whereas the normal habitat of B. paratyphosus (B) is the human alimentary tract (including the gall-bladder).5. The examination of cultures from the faeces and urine of 300 typhoid convalescents was completely negative, neither B. suipestifer nor B. paratyphosus (B) being obtained. These observations confirm those of other writers, and, apart from carrier cases, the occurrence of B. paratyphosus (B) in healthy human beings appears to be unknown in this country.Our thanks are due to Drs Fisher, Trautmann, Uhlenhuth, Williams, Rommeler, Prigge, Schern, Friedrichs, Savage and Fowler, who have very kindly supplied us with strains of bacilli for investigation.

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Section: Methods Employedsupporting

confidence: 80%

Section: Methods Employedmentioning

confidence: 99%

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On the Paratyphoid Group of Bacilli

Bainbridge

O'Brien

1911

J. Hyg.

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“…These results were substantiated by the findings of Myers (1920) and Tanner (1917) who also stated that no hydrogen sulphide was produced from 2-thiohydantoin or magnesium sulphate. Seiffert (1909) investigated the effect of sugars on hydrogen sulphide production. Working with strains of the Salmonella group he found that this substance was evolved in very varying amounts, and that the addition of sugar to the peptone water greatly increased the production, as judged by the blackening of lead acetate paper.…”

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confidence: 99%

The Influence of Carbohydrates on Hydrogen sulphide Production byBacillus aertrycke(Mutton)

Heap

Cadness

1924

J. Hyg.

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AN important aspect of the investigation of bacterial metabolism is the study of the substrate and its changes and of the resulting products; together with an examination of the rate of change. The present report deals with the influence of certain carbohydrates in modifying the action of one species of bacteria upon the protein molecule.Hirschler (1886) found that sugars inhibited the production of indol and other phenolic bodies, and preferred the explanation that sugars were more easily decomposed than proteins. He showed that in mixed cultures proteins are not attacked when sugars are present, although the acids formed were neutralised by calcium carbonate.Smith and also Peckham (1897) concluded that non-production of indol in sugar media was due to acid formation. This seemed to be supported by the work of Glenn (1911), who found that 05 per cent. of added lactic acid prevented indol formation, and also that the presence of sugars prevented the liquefaction of gelatine. It has, indeed, frequently been stated that organisms growing on a sugar-protein medium do not form indol, liquefy gelatine nor digest casein, and that ammonia production is greatly lessened. Acid production from sugars has been put forward as an explanation for this inhibition of the production of protein decomposition products.Fischer (1915) found that neither hydrion concentration nor total acidity influenced indol production; and suggested that glucose inhibited the action of the proteolytic enzyme. Kendall, Day and Walker (1913) adopted a very similar hypothesis, in stating that "protein sparing" is not due to acids produced from sugars, but that sugars serve the energy requirements more readily than do proteins, and that the activity of the organisms is diverted from the protein to the sugar, so that protein decomposition products are found wanting. They state that the slight ammonia production, which occurs, indicates the small amount of protein decomposition necessary for structural requirements. It is generally stated that the production of acid from sugar inhibits the liquefaction of gelatine by B. proteus, but Kendall and Walker (1915) found that enzymes from this organism reacted in the presence of glucose or of organic acids as

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Zur Systematik der Bakterien

Haupt¹

1935

Ergebnisse Der Hygiene Bakteriologie Immunitätsforschung Und Experimentellen Therapie

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Studien zur Salmonellagruppe (Paratyphus-B-Gruppe)

Cited by 8 publications

References 0 publications

On the Paratyphoid Group of Bacilli

On the Paratyphoid Group of Bacilli

The Influence of Carbohydrates on Hydrogen sulphide Production byBacillus aertrycke(Mutton)

Zur Systematik der Bakterien

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