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  • 11
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Ultramicroscopy 19 (1986), S. 114 
    ISSN: 0304-3991
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1432-2307
    Keywords: Giardiasis ; Immunohistochemistry ; Morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Jejunal mucosa biopsies from non-immune deficient patients with Giardia lamblia infestation were examined and showed three different groups of mucosal changes, distinguishable on morphological and immunohistochemical grounds. In three patients no morphological or immunohistochemical abnormalities were found (group A). In five patients a normal villous architecture was seen. These biopsies had increased numbers of interepithelial lymphocytes and of immunoglobulin containing cells in the lamina propria, with a relative increase of the number of IgA and IgG containing cells (group B). Two patients with a malabsorption syndrome due to giardiasis had marked villous atrophy, documented by morphometric measurements and large numbers of interepithelial lymphocytes and of immunoglobulin containing cells in the lamina propria, especially IgA and IgG (group C). These findings differ considerably from those in patients with immunodeficiency or gluten sensitive enteropathy. This suggests that when villous atrophy of the jejunal mucosa is found immunohistochemistry of Jejunal biopsy specimens may be helpful in the differential diagnosis between mere giardiasis and giardiasis superimposed on immunodeficiency or gluten sensitive enteropathy.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 233 (1983), S. 131-140 
    ISSN: 1432-0711
    Keywords: Chlamydia trachomatis ; CIN
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We found, as have others, a strong correlation between indirect immunofluorescence techniques and cell culture for the diagnosis ofChlamydia trachomatis infection in material obtained from the cervix. Five epithelial cell types indicative ofChlamydia trachomatis infection (indicator cells) were found in smears in patients with positive immunofluorescence. An attempt to diagnoseChlamydia trachomatis infection in 50 routine smears based on the presence of these indicator cells showed false positives and false negatives so that the diagnosis ofChlamydia trachomatis still requires confirmation by immunofluorescence or culture techniques. The indicator cells frequently had the same morphometric features as cells seen with cervical intraepithelial neoplasia, which may explain why some smears revert to normal after patients are given antibiotics.
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In tissue of rats with disseminated intravascular coagulation, fibrin microthrombi can be sensitively detected by immunohistochemical methods, using antisera against rat fibrinogen or fibrin monomer. An indirect immunoperoxidase procedure on paraplast-embedded sections yields best results with regard to the morphology of the thrombi and their localization in the tissue. Only fibrillar immunoreactive material, oriented lengthwise in the vessels, should be regarded as microthrombi formed in vivo.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The influence of different fixation methods on the results of immunoperoxydase staining of immunoglobulin and gastrin producing cells in gastric and duodenal mucosa was investigated. An indirect method was used on paraffin sections. It appeared that that fixatives containing sublimate gave the most consistent results, a sublimate-formaldehyde mixture being the best.
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1432-0428
    Keywords: Juvenile diabetes mellitus ; autoantibodies ; fluorescent antibody technique ; prediabetic state ; IgG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Circulating islet cell antibodies (ICA) were present in high frequency (80%) early after diagnosis and decreased in the time course of childhood diabetes mellitus. The complement fixing ability of islet cell antibodies (CF-ICA) in the course of the disease appeared to depend on the titre of ICA: the coefficient of correlation between ICA and CF-ICA titres was 0.79 and all ICA's with a titre over 16 were complement-fixing. Incubating fresh frozen human pancreatic sections thrice rather than once with the children's sera, increased the detectability of complement fixation by a factor 1.4 in all ICA-positive sera. Thus tested, the detection of complement fixation per se did not appear to have a separate pathogenic significance, as the fraction of complement fixing ICA's was almost constant throughout the clinical course. The presence of ICA-IgG subclasses also was dependent on the ICA titre: above a titre of 16 mostly all four subclasses could be detected. Incubating the pancreatic tissue thrice rather than once with ICA-positive sera resulted in enhanced detectability of ICA-IgG1. Early in the course of childhood diabetes, including two prediabetic children, most of the IgG subclasses could be detected in ICA, but after a duration of one year IgG1 alone was mainly seen. In two other children, having a family history of insulin-dependency, restriction to the IgG2 subclass was found.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 7 (1988), S. 388-393 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An ELISA for detection of IgG, IgA, and IgM antibody using an acid-glycine extract fromCampylobacter jejuni as antigen was developed. To determine the value of this assay for the diagnosis of acuteCampylobacter jejuni infections, the IgG, IgA, and IgM immune response againstCampylobacter jejuni was investigated at various timepoints after infection in patients with culture-proven infection. A total of 112 sera from 46 patients and 78 sera from a control group were tested. All but one of the 46 patients with culture-provenCampylobacter jejuni enteritis developed IgG antibodies againstCampylobacter jejuni. IgA and IgM ELISA both showed 97% specificity, and sensitivity of 63% and 30% respectively. IgG antibody titers generally remained at a constant level for more than 50 days, whereas IgA and IgM antibody titers declined more rapidly to normal values within 30 to 50 days after onset of clinical symptoms. Detection ofCampylobacter jejuni specific IgA antibodies in a single serum sample provided the most useful assay for serological diagnosis ofCampylobacter jejuni enteritis. The presence ofCampylobacter jejuni specific IgM antibodies was the sole diagnostic criterion in three cases. Serological diagnosis ofCampylobacter jejuni enteritis should therefore include both IgA and IgM antibody determination.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 9 (1990), S. 864-868 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sequences derived from the endogenous plasmid ofChlamydia trachomatis and from the genes coding for ribosomal 16S RNA ofChlamydia psittaci were used as primers and oligonucleotide probes for detection of chlamydiae by the polymerase chain reaction. The endogenous plasmid primers generated specific amplified products of 517 bp with all knownChlamydia trachomatis serovars. No specific products ofChlamydia psittaci andChlamydia pneumoniae could be detected using these primers. With the rRNA primers specific amplified products of 208 bp were generated withChlamydia psittaci, Chlamydia trachomatis andChlamydia pneumoniae. No specific amplified products were detected with DNA isolated from a variety of microorganisms from the urogenital and the respiratory tract. Of 156 clinical specimens used for evaluation of the polymerase chain reaction, 26 were found to be positive forChlamydia trachomatis on culture. All 26 culture positive samples were also found to be positive forChalmydia trachomatis DNA by the polymerase chain reaction with both primer sets. Two culture negative samples were also found to be positive by this technique. The polymerase chain reaction thus seems to be a sensitive and reliable method for detection ofChlamydia trachomatis.
    Type of Medium: Electronic Resource
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  • 19
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 17 Patienten mit DH wurden vielfältige Duodenum- und Jejunum-Biopsien verrichtet. Die Dünndarm-Biopsien aller dieser Patienten zeigten histopathologische Änderungen, die cöliakie-ähnlich waren. Vierzehn dieser Patienten hielten eine glutenfreie Diät (GFD) während mehr als 8 Monaten. Bei allen untersuchten Patienten, die Diät hielten, verbesserten sich die Dünndarmerscheinungen. Die Dosierung von Dapsone, nötig für die Kontrolle der Hauterscheinungen, konnte reduziert werden um mehr als 50% bei 4 Patienten, und 5 andere Patienten, die die glutenfreie Diät auch hielten, brauchten diese Dapsone nicht mehr. Die Immunoglobulin enthaltenden Zellen in der Lamina propria wurden gezählt bei 8 Patienten, die nicht eine GFD hielten, bei 6 Patienten mit dieser GFD und bei 8 gesunden Kontroll-Personen. Die Zahl der IgA, IgM und IgG enthaltenden Zellen hat bei den meisten der DH-Patienten, die keine GFD hielten, zugenommen. Die Zahl der IgM enthaltenden Zellen bei den DH-Patienten, die eine GFD hielten, war dieselbe wie die Zahl dieser IgM enthaltenden Zellen bei den gesunden Kontroll-Personen. Aus dieser Untersuchung könnte man schließen, daß Gluten hauptsächlich eine IgM-Stimulierung in der Lamina propria hervorruft.
    Notes: Summary In 17 patients with DH, multiple duodenal and jejunal biopsies were performed. In all patients the small-intestinal biopsy-specimens showed histopathological changes compatible with coeliac disease. Fourteen of the patients maintained a gluten-free diet (GFD) for more than 8 months. The small-intestinal lesions improved in all patients investigated during the GFD. The dosage of Dapsone needed to control the skin lesions could be reduced by more than 50% in 4 patients and the Dapsone could be stopped in 5 other patients on GFD. The immunoglobulin-bearing cells in the lamina propria were counted in 8 patients not on a gluten-free diet, in 6 patients on gluten-free diet, and in 8 healthy controls. The numbers of IgA-, IgM- and IgG-bearing cells were increased in most of the DH patients who were not on a gluten-free diet. The number of IgM-bearing cells in the DH patients who were on a gluten-free diet was the same as that in the control group. This may indicate a mainly IgM response in the lamina propria induced by gluten.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 40 (1995), S. 609-614 
    ISSN: 1573-2568
    Keywords: serology ; gastritis ; Helicobacter pylori ; healthy volunteers ; pepsinogens ; gastrin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was undertaken in healthy volunteers to determine the relation between serum levels of pepsinogen A, pepsinogen C, pepsinogen A:C ratio, and gastrin on the one hand and histology of the gastric mucosa on the other. The grade of gastritis was scored separately for antral and fundic mucosa by three different classifications: Whitehead, activity, and the Sydney score. Among 48 healthy volunteers studied, 17 were found to have gastritis according to the criteria of Whitehead. Fourteen of these 17 subjects with gastritis hadH. pylori in gastric biopsies. In all 48 subjects serum pepsinogen A (r=0.298−0.506;P〈0.01−P〈0.05), pepsinogen A:C ratio (r between −0.377 and −0.495;P〈0.001−P〈0.05) and gastrin (r=0.38−0.695;P=0.007−P〈0.01) were significantly correlated to the severity of both antral and body gastritis as assessed by all three classifications. In contrast, there was no significant correlation between serum pepsinogen C and any of the gastritis scores. When the 17 subjects with gastritis were analyzed separately, there were no correlations between the parameters studied and gastritis of the antrum. Regarding the corpus mucosa, serum PgA correlated significantly with the activity score (r=0.520;P=0.03), weakly with the Sydney score (r=0.465;P=0.06), but not with the Whitehead score. Serum PgC correlated with the Whitehead (r=0.555;P=0.02) and Sydney score (r=0.523;P=0.03), but only weakly with the activity score (r=0.441;P=0.08). The pepsinogen A:C ratio showed only a weak inverse correlation with the Whitehead gastritis score (r=−0.471;P=0.06), but not with the two other scores. Serum gastrin was significantly correlated with the Whitehead (r=0.634;P=0.006) and the Sydney score (r=0.501;P=0.04), but not with the activity score of the fundic mucosa. It is concluded that among healthy volunteers with gastritis, serological parameters are only correlated to the severity of corpus but not of antral gastritis. Serum PgC and gastrin correlated to the severity of corpus gastritis only if atrophy is comprised in the classification. In contrast, serum PgA correlates only with the activity of corpus gastritis. Thus, serological parameters reflect specific histologic features of gastritis of the gastric body, but not of the antrum.
    Type of Medium: Electronic Resource
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