Elektronenmikroskopische Untersuchung von Pneumocystis Carinii

Wessel, W.; Ricken, D

doi:10.1007/bf00955224

Cited by 21 publications

(4 citation statements)

References 4 publications

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“…These, after a period of rest, grow inside the cyst into organisms like trophic stages and escape from the cyst in order to repeat the whole life cycle. This scheme of the life cycle is identical with the one given earlier (50) and departs from previous schemes (94,128) in the division of trophic forms.…”

Section: T H E Life Cyclesupporting

confidence: 58%

“…26) shows clearly that the intracystic bodies do not originate by division of one original intracystic body as has been claimed. Several authors have noted that the intracystic body membrane originating inside the cyst is connected in some places with the inner wall (plasma membrane) of the cyst (128,82). Some authors (8,94) stated that the young intracystic bodies are enveloped by a membrane which seems to rise from one point of the cyst wall and to form several pouches inside the cyst, each containing one body.…”

Section: It Has Recently Been Suggested That the Expansions Of The mentioning

confidence: 99%

“…Numerous electron microscope studies (5, 6, 8, 9, 10, 14a, 24,29,42,82,83,91,92,93,94,108,109,115,118,128) attempted to elucidate the basic ultrastructure of the organism, but did not contribute to a conclusive understanding of its taxonomic status. On the basis of its fine structure, the possible relationships of Pneumocystis to protozoa in general (29,128), to sporozoan protozoa (6), to yeasts (82,94,118), to a yeast infected by a virus (93), to viruses (94,108), to "pleuropneumonia-like organisms" (109) and to structurally changed host cells (67a, 82) were considered.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Pneumocystis carinii Delanoë, its Ultrastructure and Ultrastructural Affinities*

Vávra

Kucera

1970

The Journal of Protozoology

132

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SYNOPSIS The fine structure of Pneumocystis carinii Delanoë is described in detail and is compared to the fine structure of protozoa and fungi. Pneumocystis does not have ultrastructural affinities to Protozoa but rather to fungi. Specifically, the process of intracystic body formation in the cyst is similar to the formation of ascospores inside a yeast ascus. The significance of the structural similarity between Pneumocystis and fungi is discussed. It is concluded from the ultrastructural evidence that Pneumocystis may indeed be a yeast or have a yeast‐like stage in its life cycle. However, Pneumocystis is not completely similar to any fungus whose ultrastructure has been described so far. Perhaps its particular structure may be an adaptation to the parasitic way of life in mammalian lungs. It should be cultivated in order to be sure of its exact taxonomic position.

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Section: T H E Life Cyclesupporting

confidence: 58%

Section: It Has Recently Been Suggested That the Expansions Of The mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Pneumocystis carinii Delanoë, its Ultrastructure and Ultrastructural Affinities*

Vávra

Kucera

1970

The Journal of Protozoology

132

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“…The electron microscopic structure of the pneumocysts was investigated by Wessel & Ricken (1958) and Bommer (1962). Each cyst consists of a thick transparent outer cyst wall surrounding a membranous structure that inpouches to enclose chromatin particles between the membrane and the inner surface of the cyst wall.…”

mentioning

confidence: 99%