Enzymatic activities of cell-free extracts of Rickettsia typhi
نویسندگان
چکیده
منابع مشابه
Enzymatic activities leading to pyrimidine nucleotide biosynthesis from cell-free extracts of Rickettsia typhi.
Cell-free extracts from Rickettsia typhi were examined for the presence or absence of pyrimidine phosphotransferase enzymes and compared with the enzymes of mouse L cells and Salmonella typhimurium. The organisms were grown in mouse L cells and in the yolk sacs of chicken embryos, purified by Renografin density gradient centrifugation, and ruptured in a French pressure cell. The enzymes for the...
متن کاملRickettsia-macrophage interactions: host cell responses to Rickettsia akari and Rickettsia typhi.
The existence of intracellular rickettsiae requires entry, survival, and replication in the eukaryotic host cells and exit to initiate new infection. While endothelial cells are the preferred target cells for most pathogenic rickettsiae, infection of monocytes/macrophages may also contribute to the establishment of rickettsial infection and resulting pathogenesis. We initiated studies to charac...
متن کاملThe bacterial oxidation of tryptophan. III. Enzymatic activities of cell-free extracts from bacteria employing the aromatic pathway.
Analysis of the adaptive patterns of many tryptophan-oxidizing pseudomonads indicates that a majority of these organisms metabolize tryptophan via kynurenine, anthranilic acid, and catechol-the so-called "aromatic pathway" (Stanier, Hayaishi, and Tsuchida, 1951). In order to confirm the existence of this pathway, we have undertaken a study of the enzymatic activities of cellfree extracts. Only ...
متن کاملProperties of quinoxaline oxide-resistant Rickettsia typhi.
Weiss, Emilio (Naval Medical Research Institute, Bethesda, Md.) and Harry R. Dressler. Properties of quinoxaline oxide-resistant Rickettsia typhi. J. Bacteriol. 83:415-417. 1962.-An effort was made to apply to the Wilmington strain of Rickettsia typhi the observation that in certain strains of rickettsiae and viruses of the psittacosis group quinoxaline oxide resistance is easily obtained and i...
متن کاملIsolation of Rickettsia typhi from Human, Mexico
To the Editor: Murine typhus is a febrile illness caused by Rickettsia typhi. The clinical manifestations are nonspecific, and the signs and symptoms resemble those of several other febrile illnesses. Murine typhus can be a self-limiting infection; however, it should be diagnosed and treated because complications and even death can result (1). In Mexico, particularly in Yucatan State, cases of ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Infection and Immunity
سال: 1976
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.14.1.298-305.1976