Results 101 to 110 of about 657 (145)

Excystment of the Amoeba Hartmannella castellanii

Journal of General Microbiology, 1971
Comparative analysis of the DNA of 11 phages isolated from type strains of Bacillus thuringiensis was performed by means of digestion with restriction nucleases. According to the results obtained, the studied phages were classified into five groups.
M P, Stratford, A J, Griffiths
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Acanthamoeba Keratitis With Symbiosis of Hartmannella Ameba

American Journal of Ophthalmology, 1998
To report a case of severe amebic keratitis in which both Hartmannella and Acanthamoeba were isolated simultaneously from the same lesion.Case report. The deep corneal lesion was scraped for cytopathology and isolation of the pathogens. We tested the in vitro sensitivities of the pathogens to several drugs.Cultures of the corneal scrapings and of the ...
T, Inoue, S, Asari, K, Tahara, K, Hayashi, A, Kiritoshi, Y, Shimomura   +5 more
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Neochlamydia hartmannellae gen. nov., sp. nov. (Parachlamydiaceae), an endoparasite of the amoeba Hartmannella vermiformis.

Microbiology (Reading, England), 2000
Free-living amoebae are increasingly being recognized to serve as vehicles of dispersal for various bacterial human pathogens and as hosts for a variety of obligate bacterial endocytobionts. Several Chlamydia-like Acanthamoeba endocytobionts constituting the recently proposed family Parachlamydiaceae are of special interest as potential human pathogens.
Matthias, Horn, Michael, Wagner, Karl-Dieter, Müller, Ernst N, Schmid, Thomas R, Fritsche, Karl-Heinz, Schleifer, Rolf, Michel   +6 more
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Hartmannella vermiformis Inhibition of Legionella pneumophila Cultivability

Microbial Ecology, 2013
Hartmannella vermiformis and Acanthamoeba polyphaga are frequently isolated from drinking water and permissive to Legionella pneumophila parasitization. In this study, extracellular factor(s) produced by H. vermiformis and A. polyphaga were assessed for their effects on cultivability of L. pneumophila.
Helen Y, Buse, Maura J, Donohue, Nicholas J, Ashbolt   +2 more
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Effect of bioamines on the cellular differentiation of Hartmannella culbertsoni

Biochemical Pharmacology, 1974
Abstract Epinephrine, 5-hydroxytryptamine, dopamine and tyramine induce axenic encystation of the free living amoeba Hartmannella culbertsoni . Cycloheximide inhibits encystation of amoeba mediated by the amines. The amines uniformly stimulate 3 to 4-fold the ability of the cells to synthesize cyclic 3′,5′-adenosine monophosphate from adenosine ...
A K, Verma, M K, Raizada, C K, Murti
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Attachment and Entry of Legionella pneumophila in Hartmannella vermiformis

Journal of Infectious Diseases, 1993
Legionella pneumophila is an intracellular parasite of Hartmannella vermiformis. Attachment to the amebae and entry of L. pneumophila were studied by two quantitative assays: One used plate counts to measure the number of bacteria attaching to amebae at 4 degrees C; the other determined the number of intracellular bacteria by use of transmission ...
B S, Fields, S R, Fields, J N, Loy, E H, White, W L, Steffens, E B, Shotts   +5 more
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Carbohydrate Utilization by the Soil Amoeba Hartmannella castellanii

The Journal of Protozoology, 1967
SYNOPSIS. Carbohydrate utilization by 9 strains of Hartmannella castellanii has been studied by growing the amoebae in a chemically defined medium which did not support growth without an added energy source. Strains differed in the utilization of sucrose, raffinose, melibiose and mannitol. The strains which did not use sucrose for growth were shown to
K M, Adam, D A, Blewett
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Environmental induction of multinucleate Hartmannella rhysodes

Experimental Cell Research, 1963
Abstract 1. 1. When Hartmannella rhysodes was incubated in a static culture the amoebae were uniform in size and uninucleate. 2. 2. Under agitated conditions, in a fluid medium, the amoebae exhibited a variety of body sizes, nuclear sizes and nuclear numbers.
R.N. Band, Christine Machemer
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CHEMOTAXIS IN THE FREE LIVING AMOEBA (HARTMANNELLA RHYSODES)

Australian Journal of Experimental Biology and Medical Science, 1969
SummaryA method for the quantitative measurement of chemotaxis in amoebae is described. Using this method it has been possible to demonstrate that the chemotactic movement of Hartmannella rhysodes towards a food source is due to the presence of a chemotactic factor released from the food source as the result of interaction of substances, possibly ...
J, McIntyre, C R, Jenkin
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Starvation and Encystment of a Soil Amoeba Hartmannella castellanii*

The Journal of Protozoology, 1968
SYNOPSIS. The behavior of the amoeba H. castellanii was investigated in various carbon and nitrogen deficient media with a view to developing a satisfactory replacement medium for the study of encystment and excystment. Media which had been devised for other soil amoebae did not cause H. castellanii to encyst.
A J, Griffiths, D E, Hughes
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