Excystment of the Amoeba Hartmannella castellanii
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چکیده
منابع مشابه
Growth and bacteriolytic activity of a soil amoeba, Hartmannella glebae.
A soil amoeba, Hartmannella glebae, could grow on a variety of gram-positive and gram-negative bacteria, although the rate of growth was faster in the presence of gram-negative bacteria. The amoeba, however, could not use yeasts, molds, or a green alga as a nutritional source. The extract prepared from amoebae grown in the presence of Aerobacter aerogenes and Alcaligenes faecalis could lyse int...
متن کاملMorphological Changes and the Requirements for Macromolecule Synthesis during Excystment of Acanthamoeba Castellanii
Light and phase-contrast microscopic observations of excystment in Acanthamoeba castellanii have been used to classify cells in excysting populations as free trophozoites, or mature, activated, or preemergent cysts. These categories have been used to describe the kinetics of excystment. A pH of 7 and a temperature of 30 degrees C have been found to be optimal for the activation of mature cysts....
متن کاملIdentification of "Ryan Virus" as an amoeba of the genus Hartmannella.
A recent paper (Pereira, et al., 1966) reported the isolation in Britain of several strains of an antibiotic-resistant infective agent that caused unusual cytopathic effects when inoculated into cell cultures. The new agent was evidently recoverable from the respiratory tract in certain patients, mostly young children, with illnesses of varying severity but with fever and respiratory symptoms a...
متن کاملEffect of 5-bromodeoxyuridine on Growth, Encystment, and Excystment of Acanthamoeba Castellanii
Differentiat ion of several cell types is inhibi ted by 5-bromodeoxyuridine (BUdR) (1-3, 9, 12). Since B U d R can be incorpora ted into D NA in place of thymidine (TdR) (12), the inhibi t ion of different ia t ion may be due to the presence of B U d R in the DNA of the cell. In Acanthamoeba castellanii, DNA synthesis cont inues t h rough overt different iat ion of the t rophozoite into the d o...
متن کاملNeochlamydia hartmannellae gen. nov., sp. nov. (Parachlamydiaceae), an endoparasite of the amoeba Hartmannella vermiformis.
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. In this study coccoid bacterial endocytob...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1971
ISSN: 0022-1287
DOI: 10.1099/00221287-66-2-247