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Early diagnosis of amoebic keratitis due to a mixed infection with Acanthamoeba and Hartmannella
Parasitology Research, 2007A mixed keratitis due to Acanthamoeba and Hartmannella species is reported. The patient was a soft contact lens wearer. Early diagnosis was achieved by polymerase chain reaction and culture. The pathogenic potential of the isolated amoebae was proven using cytotoxicity assays.
Jacob, Lorenzo-Morales +6 more
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Purification and properties of a bacteriolytic enzyme from a soil amoeba Hartmannella glebae
Archives of Biochemistry and Biophysics, 1969Abstract A 74-fold purification of the bacteriolytic enzyme from a soil amoeba, Hartmannella glebae grown on an agar lawn of Aerobacter aerogenes has been achieved by fractionation of the crude extract with acetone and chromatography on DEAE-cellulose. The optimal pH for lytic activity is 8.0.
Y C, Chung, J M, Upadhyay, F J, Garcia
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Hartmannella: Growth controlling substances in culture medium
Protoplasma, 1970Growth inhibiting thermolabile factor(s) accumulate in some of the axenic media during growth ofHartmannella cultures. The physiological effectiveness of the factors depends in a not understood way on the concentration of cells in culture. The factor may be active antigenically.
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Serologic Changes Associated with the Encystment of Axenically Grown Hartmannella culbertsoni*
The Journal of Protozoology, 1972SYNOPSIS. Serologic reactions elicited by sonically ruptured trophic and cystic forms of Hartmannella culbertsoni were studied. The antigens of trophic amoebae reacted with their homologous rabbit antiserum showing multiple precipitin lines which could not be seen when the reacting antigens were treated with trypsin prior to application on the ...
M K, Raizada, K C, Saxena, C R, Murti
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Cell Differentiation, 1975
During encystation of Hartmannella culbertsoni induced by taurine or epinephrine, 60-70% of the reserve glycogen is degraded. Glycogen phosphorylase is activated and glycogen synthetase is inhibited after 6-8 hr of exposure to the encystation medium.
A K, Verma, M K, Raizada
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During encystation of Hartmannella culbertsoni induced by taurine or epinephrine, 60-70% of the reserve glycogen is degraded. Glycogen phosphorylase is activated and glycogen synthetase is inhibited after 6-8 hr of exposure to the encystation medium.
A K, Verma, M K, Raizada
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Hartmannella vermiformis can promote proliferation of Candida spp. in tap-water
Water Research, 2012Candida yeasts colonize humans' oral cavities as commensals or opportunistic pathogens. They may be isolated from water circulating in dental unit waterlines mixed with saliva traces mainly because of dysfunction of anti-retraction valves. Free-living amoebae (FLA), like Hartmannella vermiformis, are frequently found in aquatic environments and they ...
Barbot, Vanessa +4 more
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Intracellular survival of Francisella tularensis in Hartmannella vermiformis
2010Francisella tularensis is a highly infectious, facultative intracellular bacterium and the causative agent of tularemia. The natural reservoir of the bacterium is largely unknown. Although it has been shown that protozoa may harbor it the reservoir in nature has not been definitely identified. In this study, the ability of F. tularensis subsp. novicida
Ožanič, Mateja, Šantić, Marina
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Extrinsic Requirements for Encystation by the Soil Amoeba, Hartmannella rhysodes*
The Journal of Protozoology, 1963SYNOPSIS. The environmental factors causing encystation in Hartmannella rhysodes, a small soil amoeba, appear to be an elevated osmotic pressure, Ca2+ and Mg2+, aeration and a decrease in carbon sources. After 36 hr under these conditions, amoebae harvested during active growth encyst. Nutrients essential for growth, other than carbon sources, have no
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The Amino Acid Requirements of the Soil Amoeba, Hartmannella rhysodes Singh*
The Journal of Protozoology, 1962SYNOPSIS. A chemically defined culture medium has been developed for the soil amoeba Hartmannella rhysodes Singh which contains the minimum essential organic requirements for growth. The medium consists of 7 amino acids, 3 vitamins, a carbon source (e.g. glucose) and inorganic salts.
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American Journal of Clinical Pathology, 1966
P. W. Ensminger, C. G. Culbertson
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P. W. Ensminger, C. G. Culbertson
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