Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical microbiology and immunology 175 (1986), S. 15-26 
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract ETEC isolates from various sources (children from Ethiopia and some Asian countries, and Swedish tourists suffering from traveller's disease) were analysed with the aid of “biochemical fingerprinting”, which is a highly discriminative, computerized method designed to subdivideE. coli isolates into different phenotypes. Isolates belonging to the most common ETEC O-groups and others which had not been typeable with available O-antisera were selected. It was found that certain phenotypes of O-groups 6 and 114 could be found in materials from several continents. Phenotypes of other O-groups were usually more restricted to certain geographic areas. Among children in Addis Abeba, 19 out of 25 isolates carrying O-antigen 78 belonged to the same phenotype. Some possible explanations for the fact that certain phenotypes of enterotoxigenicE. coli could be found over the whole world are that they might represent relatively recent developed clones, or they may represent unusually stable clones. Of the isolates that had been nontypeable with available antisera, some had lost their LT-productivity after one year of storage. These isolates proved to belong to a wide variety of phenotypes, whereas nontypeable isolates which were stable LT-producers could be clustered into distinct groups. It is suggested that the non-stable LT-producers are members of the normalE. coli flora of these children, which have occasionally picked up the enterotoxin-producing plasmids, whereas most stable LT-producers represent true ETEC clones.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Medical microbiology and immunology 170 (1981), S. 27-35 
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From 1324 patients with antibiotic-associated diarrhea (AAD) 1643 stool samples were analyzed by a cell test forClostridium difficile toxin in stool filtrates and cultivation for occurrence ofC. difficile strains. In patients with no detectable toxin in their stool strains ofC. difficile were isolated in 2.2% where as when toxin was detectable, the isolation rate varied from 17% to 36%. Furthermore, there was a correlation between toxin titre in stool filtrate and production of cytotoxinin vitro by the correspondingC. difficile strains. Five clostridial strains, not belonging to the speciesC. difficile, were found to produce typical cytotoxinin vitro. However, five strains identified asC. difficile by biochemical reactions and gas liquid chromatography, did not produce an extracellular cytotoxin. The antibiotic susceptibility patterns of theClostridium strains were investigated. No correlation was recognized between antibiotic resistance of isolatedClostridium strains and the AAD-inducing antibiotic penicillins and linco/clindamycin. Neither did cases of relapse of diarrheal disease after vancomycin treatment harbourC. difficile strains with increased resistance to vancomycin. It is concluded that the pathogenesis of antibiotic-associated enterocolitis is more complex than a mere intestinal overgrowth of resistant strains ofC. difficile.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Medical microbiology and immunology 170 (1981), S. 63-72 
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was carried out to determine whether the strong epidemiological correlation observed in Sweden between production of the adhesin K88, the heat-stable (ST) and the heat-labile (LT) enterotoxins inE. coli strains of O-group 149 isolated from piglet diarrhea might be explained by linkage of their genetic determinants. From 22 different isolates plasmids coding for these virulence factors were investigated by conjugation and transduction experiments and analysis on agarose gels. The genes coding for ST production could be transferred by selection for antibiotic resistance, but behaved as transposable elements most often residing on a 55 Mdal plasmid coding for colicin B. The genes coding for raffinose fermentation and K88 antigen production were located on a 45 Mdal plasmid and the genes coding for LT production on plasmids within the 45–70 Mdal size. Thus the epidemiological importance and spread of this O-group in Sweden was explained by its stable content of two or three virulence plasmids, which could be transferred independently of one another.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Medical microbiology and immunology 174 (1985), S. 119-130 
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Escherichia coli strains causing diarrhoea in Swedish piglets were isolated; this investigation was made over a 20-year period, from 1964 to 1984. Many of the isolates belonged to O-groups 8, 141 and 149. These strains were separated into different phenotypes with the aid of a new method, “biochemical fingerprinting”. This method has been especially designed to sortE. coli-isolates into various phenotypes based on a pattern of quantitatively measured biochemical reactions. It was found that most pathogenic isolates carrying O-antigen 8 belonged to the same phenotype. This phenotype was common in the 1960's, but later it disappeared from the population and was replaced by a wide variety of different phenotypes, most of them non-enterotoxinogenic, but still belonging to O-group 8. In O-group 141 one phenotype dominated in the 1960's, but in the 1970's a new phenotype appeared, which further increased in number in the 1980's. By contrast, in the O-group 149 practically all strains isolated during the 20-year period were found to carry the relevant virulence factors and belong to the same phenotype.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 7 (1980), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 11 (1981), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 3 (1978), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 152 (1997), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In Staphylococcus aureus synthesis of many virulence factors is regulated by the agr locus. The regulatory molecule RNAIII, induced by agr, activates transcription of the α-toxin gene, hla, while it acts as a repressor of the protein A gene, spa. Forty clinical strains of S. aureus from human blood cultures were analysed for α-toxin and protein A production. An inverse correlation between α-toxin and protein A production was found in most strains. The levels of α-toxin and protein A production varied significantly among strains, which indicates various levels of the regulator, RNAIII. This was confirmed by selecting strains producing different amounts of α-toxin, showing that the variations in toxin production are due to the variations of RNAIII transcript. However, in one of the selected strains which produced high levels of α-toxin, OR153, although RNAIII is also strongly expressed, the specific hla mRNA was unexpectedly low. One partial explanation for the high α-toxin production by this clinical isolate might be its lack of extracellular proteases.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Infection 21 (1993), S. 201-205 
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Studie sollte geprüft werden, ob durch lokale Anwendung von Cephadroxil eine vaginale Kolonisation mitEscherichia coli induziert werden kann, wie sie bei Frauen mit Neigung zu rezidivierenden Harnwegsinfektionen auftritt. Die vaginale Instillation von P-Fimbrien tragendenE. coli führte bei keinem von fünf erwachsenen Cynomolgus-Affen zu einer bleibenden Kolonisation. Wenn vor dem Versuch einer Kolonisation Cephadroxil verabreicht wurde, trat bei 9/10 Experimenten eine persistierende Kolonisation ein. Cephadroxil förderte auch die Ausbreitung fäkalerE. coli-Stämme auf die Vagina. Die Verminderung der anaeroben Vaginalflora könnte den Zusammenbruch der Kolonisationsresistenz erklären. Aus klinischen Beobachtungen läßt sich ableiten, daß eine Ansammlung vonE. coli vor der Harnröhrenöffnung das Risiko für eine Harnwegsinfektion erhöht. Antibiotika, die eine solche Kolonisation fördern, könnten bei empfänglichen Personen das Risiko für Harnwegsinfektionen anheben. Dieser Aspekt läßt Antibiotika wie Cephadroxil für die Behandlung von Patienten, die anfällig für Harnwegsinfektionen sind, als weniger geeignet erscheinen.
    Notes: Summary The aim of this study was to examine whether a vaginalEscherichia coli colonization, mimicking the one seen in UTI-prone females, could be induced by local cephadroxil administration. When five adult cynomolgus monkeys were given a vaginal flush with a P-fimbriatedE. coli strain, none became persistently colonized. When such colonization attempts were preceded by cephadroxil administration a persistent colonization occurred in 9/10 experiments. Cephadroxil also promoted a spread of fecalE. coli strains to the vagina. Reduction of the anaerobic vaginal flora can explain the breakdown of the colonization resistance. Clinical observations suggest that accumulation ofE. coli around the urethral orifice increases the risk of UTI. Therefore antibiotics which promote such colonization may increase the risk for UTI in susceptible patients. From this point of view antibiotics such as cephadroxil may be less suitable for treatment of UTI-susceptible patients.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...