Results 171 to 180 of about 44,650 (212)

Behavior of Escherichia coli R factors in Salmonella typhi.

Revista latinoamericana de microbiologia, 1994
Seventeen R factors originally found in community-isolated E. coli strains were transferred by in vitro conjugation experiments to three S. typhi strains and to J55, an E. coli J53 pro met derivative strain, in order to analyze R factor stability through 100 generations in liquid cultures at low bacterial density thus avoiding R factor retransfer. Four
A, Mendoza-Medellín, I, Ríos-Chávez, D, Amaro-Robles   +2 more
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Restriction and modification of typing phages by an R factor in S. typhi.

Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Erste Abteilung Originale. Reihe A: Medizinische Mikrobiologie und Parasitologie, 1976
We have investigated the qualities of one R factor 552 discovered on a strain of S. typhi resistant to A, C, S, T, nontypable, isolated from stool cultures; from the same patient, before starting the treatment we isolated, from his blood sample, the strain S. typhi 221, sensitive to A, C, T, degraded phage-type Vi A.
V, Rusu, O, Dorobăţ-Baron, M, Coşman, D, Lăzăroae   +3 more
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Superinfection Compatibility of R Factors in Shigella dysenteriae Type 1 from Central America and Salmonella typhi from Mexico

Journal of Infectious Diseases, 1974
W. B. III. Effect of prostaglandin E1 on electrolyte transport in rabbit ileal mucosa [abstract]. J. Clin. Invest. 49:2a, 1970. 20. Mizushima, Y., Sakai, S., Yamaura, M. Mode of stabilizing actibn of non-steroid anti-inflammatory drugs on erythrocyte membrane. Biochem. Pharmacol. 19:227-234, 1970. 21. Gaut, Z. N., Solomon, H. M.
G M, Thorne, W E, Farrar
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Instability of Escherichia coli R-factors in Salmonella enterica serovar Typhi involves formation of recombinant composite plasmid structures

Plasmid, 2012
In spite of a well-documented ability of Samonella enterica Typhi strains to receive R factors from Escherichia coli and other enterobacteria, epidemiological data show that Typhi is a rather poor host of antibiotic-resistance genes and in fact, of plasmids, suggesting that most of the plasmids naturally acquired by Typhi strains become unstable and ...
Aurelio, Mendoza-Medellín, Rafael, Camacho-Carranza, Everardo, Curiel-Quesada   +2 more
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The soluble antigens of Rickettsia prowazeki, R. typhi and R. canada. Investigation of their interrelationship by various serological methods.

Zeitschrift fur Immunitatsforschung, experimentelle und klinische Immunologie, 1975
The purpose of this research is the isolation of an eventual species-specific fraction from the "soluble antigen" of Rickettsiae. The "soluble antigen" of R. prowazeki (Breinl strain), R. typhi (Wilmington strain) and R. canada were purified at 25% saturation with ammonium sulphate (PSA). Corresponding antisera were produced in rabbits. The serological
R J, Reiss-Gutfreund, P, Cappucinelli, G, Cavallo   +2 more
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Genetic Properties of R Factors Associated with Epidemic Strains of Shigella dysenteriae Type I from Central America and Salmonella typhi from Mexico

Journal of Infectious Diseases, 1973
genetically compared with the R factors carried by the Salmonella typhi responsible for the 1972 outbreak of typhoid fever in Mexico. R factors from both genera confer the same pattern of resistance to chloramphenicol (Cm), streptomycin (S), sulfonamide (Su), and tetracycline (Tc) on their hosts.
G M, Thorne, W E, Farrar
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Characterization of R-plasmids coding for ampicillin resistance in Salmonella typhi-murium.

Acta microbiologica Hungarica, 1986
Eight Salmonella typhi-murium strains coding resistance to ampicillin were chosen from 38 strains isolated in different counties of Hungary in 1981, and their plasmids were characterized by agarose gel electrophoresis. Incompatibility groups and molecular weights of transferable R-plasmids coding resistance to ampicillin were determined and restriction
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[Characterization of R plasmids in "Salmonella typhi" and "S. paratyphi B" from Algeria (author's transl)].

Annales de microbiologie, 1980
The distribution of R plasmids in six drug-resistant Salmonella typhi strains and four S. paratyphi B strains isolated from human in Algeria was studied. All strains but one S. typhi harbored one conjugative R plasmid. Plasmids belonging to the incompatibility groups FIme, B, W or P were found in the S.
W, Akache, K, Rahal
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[R plasmid distribution in S. typhi isolated on the territory of the left coast of the Ukraine in 1970-1982].

Antibiotiki, 1983
A total of 373 strains of S. typhi isolated in 1970-1982 were tested with respect to their sensitivity to 9 antibiotics active against gram-negative bacteria. It was shown that about 1/3 of the isolates were resistant to 1-3 antibiotics. Among the resistant isolates the number of strains resistant to 4-5 and more antibiotics amounted to 12.5 per cent ...
N S, Morozova, O I, Emel'ianova, N N, Kibardina, G I, Karmanova, V A, Shamtko   +4 more
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Analysis of Rickettsia typhi-infected and uninfected cat flea (Ctenocephalides felis) midgut cDNA libraries: deciphering molecular pathways involved in host response to R. typhi infection.

Insect molecular biology, 2010
Murine typhus is a flea-borne febrile illness that is caused by the obligate intracellular bacterium, Rickettsia typhi. The cat flea, Ctenocephalides felis, acquires R. typhi by imbibing a bloodmeal from a rickettsemic vertebrate host. To explore which transcripts are expressed in the midgut in response to challenge with R.
S M, Dreher-Lesnick, S M, Ceraul, S C, Lesnick, J J, Gillespie, J M, Anderson, R C, Jochim, J G, Valenzuela, A F, Azad   +7 more
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