Results 111 to 120 of about 699 (147)
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Acanthamoeba Keratitis With Symbiosis of Hartmannella Ameba
American Journal of Ophthalmology, 1998To 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 +5 more
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Hartmannella vermiformis Inhibition of Legionella pneumophila Cultivability
Microbial Ecology, 2013Hartmannella 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 +2 more
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Effect of bioamines on the cellular differentiation of Hartmannella culbertsoni
Biochemical Pharmacology, 1974Abstract 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, 1993Legionella 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 +5 more
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Carbohydrate Utilization by the Soil Amoeba Hartmannella castellanii
The Journal of Protozoology, 1967SYNOPSIS. 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, 1963Abstract 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, 1969SummaryA 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, 1968SYNOPSIS. 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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l-Threonine dehydratase activity of axenically grown Hartmannella culbertsoni
Archiv f�r Mikrobiologie, 19720730 09 1. l-Threonine dehydratase (E.C. 4.2.1.16) activity in the cell-free extracts of the trophozoites of Hartmannella culbertsoni has been purified 20-fold. 2. The enzyme requires pyridoxal-5-phosphate for its activity and is not cold-labile.
M K, Raizada, V K, Rao
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The Physiology of Encystment of Hartmannella castellanii*
The Journal of Protozoology, 1969SYNOPSIS. Some aspects of the physiology of encystment of the soil amoeba Hartmannella castellanii in a replacement encystment medium consisting of 5 × 10‐2 M MgCl2 have been investigated. It is suggested that measurement of the cellulose produced during encystment in the synthesis of the cyst wall is a more reliable measure of the process than other ...
A. J. GRIFFITHS, D. E. HUGHES
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