The effect of oxygen on Amoeba proteus

Hulpieu, H. R.

doi:10.1002/jez.1400560303

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…Specht (1934) considers the measurements of the oxygen consumption and carbon dioxide production in Spirostomum amhiguum vary because of the presence of a base produced by the organism. Soule (1925) Hulpieu (1930), succumbs slowly when the amount of oxygen in water is less than 0.005 per cent and also in excess, which latter confirms Putter's observation of Spirostomum. The Hypermastigina of the termite are killed, according to Cleveland, when the host animals are kept in an excess of oxygen.…”

Section: Physiology 97supporting

confidence: 65%

Protozoology, by Richard Roksabro Kudo... with two hundred and ninety-one illustrations.

Kudo¹

1939

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Section: Physiology 97supporting

confidence: 65%

Protozoology, by Richard Roksabro Kudo... with two hundred and ninety-one illustrations.

Kudo¹

1939

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“…I n 1942, Marsland and Brownfi7 reported that the ATP system appears to be active in the gelation reactions of freshly prepared myosin sol. Recently, the importance of the ATP system in sol-gel transformations has received strong support from the work of Ts'o and his associates,@-6g who have isolated and characterized an ATPsensitive protein (myxomyosin) from an amoeboid slime mold (Physarum poZy- 44 as well as marine Proteins and nucleic acids.…”

Section: Anestheticsmentioning

confidence: 99%

Effects of Selected Chemical Agents on Amoebae*

Zimmerman

1959

Annals of the New York Academy of Sciences

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“…anaerobiosis. Ameba proteus is unable to withstand completely anaerobic conditions, but a trace of oxygen is suffcient to permit activity (Hulpieu, 1930). In the case of Polytoma uwella oxygen may actually limit the growth rate (Rottier, 1936).…”

Section: The Effect Of Environmentalmentioning

confidence: 99%

The Bionomics of Coprophilic Protozoa

Watson

1946

Biological Reviews

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Summary The coprophilic Protozoa are forms capable of living in faeces. They form a loose ecological group of considerable practical and economic importance. The development of the conception of coprophilic Protozoa is traced in the article, and it is shown that at first they were frequently confused with or taken for parasitic species, many of them being considered as pathogenic. Further research showed that they were in reality free‐living species which had become adapted to life in dung. The faecal environment is peculiar in being characterized by abundance of decaying organic matter, vast numbers of bacteria with eonsequent restriction of free oxygen, and restriction of fluid to small pockets and channels between the solid particles. Hence the only Protozoa able to live in undiluted faeces are polysaprobic species whose methods of locomotion permit them to move in restricted volumes of fluid or in a viscous medium. Some coprophilic Protozoa are holozoic, while others are saprozoic. Most of them flourish best at low temperatures, but they are tolerant of wide variation in the hydrogen‐ion concentration of the medium and can withstand temporary deficiency of oxygen and abnormally high concentrations of carbon dioxide. They are all well adapted to withstand desiccation by anabiosis or cyst formation. Although they can live and multiply in normal faeces so long as they remain sufficiently moist, many of them are not able to survive in pathological faeces from cases of diarrhoea and dysentery. The factors inhibiting growth in this medium are the presence of drugs, or of unaltered bile salts, an unusually high osmotic pressure, or the admixture of urine with the fluid stool. The presence of mucus in the faeces, on the other hand, is favourable to the growth of coprophilic Protozoa. Although urine is lethal to the active forms, it probably does not act as an important limiting factor in nature, since with normal faeces it merely bathes the surface and does not become admixed to any extent. A classified list is given of all the Protozoa reported from human and animal faeces. While the drying up of the faeces leads to the disappearance of active Protozoa, the dilution of the faeces artificially or by rain leads to the development of a succession of forms analogous to that which takes place in a hay infusion or in the waters of a polluted river during self‐purification. Coprophilic Protozoa may be classified, according to their degree of adaptation, into three groups, namely: (a) Oligocoprophilic forms, able to live in faeces only after dilution; (b) Mesocoprophilic forms, able to live in some undiluted faeces, especially if of loose consistency, but flourishing only after dilution; (c) Polycoprophilic forms, able to flourish in undiluted normal faeces. The medical and veterinary importance of the coprophilic Protozoa lies in the possibility of confusing them with or taking them for true parasitic forms. Some of the classical cases of pseudo‐parasitism, due to this cause, are described. Coprophilic Protozoa gain access...

show abstract

The effect of oxygen on Amoeba proteus

Cited by 13 publications

References 15 publications

Protozoology, by Richard Roksabro Kudo... with two hundred and ninety-one illustrations.

Protozoology, by Richard Roksabro Kudo... with two hundred and ninety-one illustrations.

Effects of Selected Chemical Agents on Amoebae*

The Bionomics of Coprophilic Protozoa

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