The structure and division of Chilomastix intestinalis Kuczynski, with notes on similar forms in man and other vertebrates

Nie, Dashu

doi:10.1002/jmor.1050820303

Cited by 19 publications

(6 citation statements)

References 15 publications

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“…The infection of rats with Entamocba muris from mice and hamsters parallels the findings of Neal (45,46). Kessel(35) has reported transfaunations of E. muris from rats to mice and from mice to rats.…”

Section: Rcsidtssupporting

confidence: 56%

Transfaunation Studies on the Host Specificity of the Enteric Protozoa of Rodents*

Saxe

1954

The Journal of Protozoology

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Breeding colonies of protozoa-free laboratory rats (Rattiis norvegicus) and golden hamsters (Mesocricetrrs aztratzrs) were established by early weaning or by drug treatment. Attempts were made to transfaunate the enteric protozoa of various rodents to protozoa-free progeny of these colonies. Efforts to transfer the fauna of guinea pigs (Cnvia porcellirsi to rats and hamsters have failed and indicate that this fauna is physiologically isolated as well as morphologically distinct from that of other laboratory rodents. The faunas of rats and hamsters appear to be morphologically identical and freely interchangeable. That certain of the species found in rats and hamsters also occur in the mouse (hfzis nzirsculusI is indicated by successful transfaunations: mouse to rat and hamster. The suggestion is made that the fauna of the mouse and rat is indigenous but that the fauna of laboratory hamsters may have been acquired since domestication.Hexanlastir muris from Neotuiiia fmcipes and Trichontonas microti from Microtzrs pennsylvaniciis have been transfaunated to rats. Other enteric protozoa from these hosts and also from Jfarniuta inunax and Dipodoinys nzerriaini have not established themselves in rats and, if morphological differences cannot be found, should be considered biological races of their counterparts in the fauna of laboratory rodents.Species of lumen-dwelling enteric protozoa should be based upon morphological distinctions and not upon host specificity. The latter, as demonstrated by these experiments, is not rigidly determined.

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Section: Rcsidtssupporting

confidence: 56%

Transfaunation Studies on the Host Specificity of the Enteric Protozoa of Rodents*

Saxe

1954

The Journal of Protozoology

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“…Dans cette ttude ultrastructurale, nous confirmons les rCsultats obtenus en microscopie classique quant i l'organisation gtntrale de la cellule, et nous apportons des prtcisions sur la structure des diffirents organites cellulaires, ce qui permet de faire des comparaisons avec d'autres groupes de FlagellCs. La prtsence d'un rtseau sous-pelliculaire, antirieurement soupGonnCe (17), assure une rigidit6 de la paroi et peut expliquer l'absence de deformation de la cellule. Au cours de I'enkystement, quand les microtubules sous-membranaires disparaissent en partie ou se dCsorganisent (Fig.…”

Section: Discussionunclassified

“…La disposition des cinttosomes en 2 couples avait C t t observte (17). 11s sont relies entre eux par des microfilaments.…”

Section: Discussionunclassified

Etude Ultrastructurale du Trophozoite et du Kyste chez le Genre Chilomastix Alexeieff, 1910 (Zoomastigophorea, Retortamonadida Grassé, 1952)

Brugerolle

1973

The Journal of Protozoology

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RESUME L'organisation cellulaire et la structure des organites de Chilomastix aulastomi sont étudiées en microscopie électronique. La cellule est limitée par une pellicule constituée de la membrane cytoplasmique, d'un feuillet continu de microtubules reliés les uns aux autres et, en certains endroits, d'une couche de microfibrilles. Les cinétosomes disposés en 2 paires et orthogonaux deux à deux, sont liés entre eux par du matériel microfibrillaire. Le flagelle récurrent porte 2 expansions aliformes. La lèvre droite du cytostome est armée d'une fibre qui présente une structure soit microtubulaire, avec des éléments jointifs enrobés dans un matériel microfibrillaire osmiophile dans la partie antérieure, soit périodique et paracristalline dans sa partie postérieure. La lèvre gauche du cytostome contient également une fibre constituée de microtubules jointifs et de microfibrilles. Un arceau de microfibrilles réunit les 2 lèvres du cytostome à son sommet. Les fibres des lèvres cytostomiennes sont reliées aux microtubules sous‐pelliculaires. L'endocytose se réalise dans le cytopharynx, placé en prolongement du cytostome et en des points dépourvus de microtubules sous‐membranaires. L'hémifuseau de division a été observé. Il n'y a ni mitochondrie, ni appareil de Golgi. La cellule enkystée conserve ses organites dans le cytoplasme: cinétosomes, flagelles, fibres du cytostome. Les microtubules sous‐membranaires disparaissent, à l'exception d'un rideau intracytoplasmique au pôle apical. La paroi du kyste, épaisse de 0,4 μm, est constituée, d'une épaisse couche de matériel microfibrillaire. Il n'y a pas d'opercule ni de pore. La sécrétion de cette paroi est précédée de l'accumulation de vésicules à contenu granuleux dans le cytoplasme de la cellule. L'organisation et les structures de Chilomastix sont comparées à celles des autres genres de Retortamonadida et aux groupes de Zooflagellata voisins: Kinetoplastida, Diplomonadida, Trichomonadida. SYNOPSIS Fine structure of Chilomastix aulastomi was studied by electron microscopy. In the trophozoite, the cell is surrounded by a pellicle composed of a cytoplasmic membrane, a continuous layer of interconnected microtubules, and in certain regions, of a layer of microfibrils. Kinetosomes, arranged in 2 orthogonal pairs, are interconnected by microfibrillar material. The recurrent flagellum has 2 wing‐like extensions. The right lip of the cytostome is equipped with a fiber whose anterior part consists of interconnected microtubules embedded in osmiophilic microfibrillar material; the posterior part has a periodic and paracrystalline structure. The left cytostomal lip also contains a fiber made of linked microtubules associated with microfibrils. An arch of microfibrils connects the 2 lips at the anterior edge of the cytostome. The cytostomal fibers are connected to the subpellicular microtubules. Endocytosis takes place in the cytopharynx, which is an extension of the cytostome, but only in areas free of the pellicular microtubules. A “hemispindle” was seen in division. There are ne...

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“…This order has only one family, the Retortamonadidae, with two genera, Retortamonas and Chilomastix. Only Chilomastix has been reported to date from birds: C. gallinarum Martin and Robertson, 1911, from poultry (Nie 1948).…”

mentioning

confidence: 99%

First report of the genus Retortamonas (Sarcomastigophora: Retortamonadidae) in birds

Martínez-Díaz

Castro

Herrera

et al. 2001

Mem. Inst. Oswaldo Cruz

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In studies carried out on the parasites infecting ostriches (Struthio camelus) in Spain, trophozoites of Retortamonas sp. have been found in the intestinal contents of 28 out of 146 slaughtered ostriches. The species infecting ostriches could not be determined from the morphological data available. However, these findings are important as they constitute the first report of the genus Retortamonas in birds

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The structure and division of Chilomastix intestinalis Kuczynski, with notes on similar forms in man and other vertebrates

Cited by 19 publications

References 15 publications

Transfaunation Studies on the Host Specificity of the Enteric Protozoa of Rodents*

Transfaunation Studies on the Host Specificity of the Enteric Protozoa of Rodents*

Etude Ultrastructurale du Trophozoite et du Kyste chez le Genre Chilomastix Alexeieff, 1910 (Zoomastigophorea, Retortamonadida Grassé, 1952)

First report of the genus Retortamonas (Sarcomastigophora: Retortamonadidae) in birds

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