A survey of over 600 'normal' sera from 14 animal species by immunoprecipitin tests in cellulose acetate using viron antigens revealed a high incidence of precipitating activity against a broad range of influenza A virus strains, particularly A2hHong Kong/1/68 and /PR8. However, serum treatments trypsin-heat-periodate, NaIO4, V. cholerae receptor-destroying enzyme (RDE), or kaolin eliminated most precipitating activity, which suggests that it was due to "non-specific" inhibitors of influenze viruses.
View Article and Find Full Text PDFJ Clin Pathol Suppl (Assoc Clin Pathol)
February 1984
The concept of tumour-specific antigens is constantly undergoing reappraisal with the development of more sensitive methods for their detection. This has resulted in the finding that the many 'new' antigens produced by human tumours or materials immunologically closely related to them are also present in non-neoplastic tissues, albeit in small amounts. However, other antigens still appear to exist almost entirely in or on tumour cells so that the antigens of human tumours may be subdivided into either tumour-associated macromolecules or tumour-specific antigens.
View Article and Find Full Text PDF1. 2-Deoxy-2-fluoro-d-galactose, 3-deoxy-3-fluoro-d-galactose, 4-deoxy-4-fluoro-d-galactose, 6-deoxy-6-fluoro-d-galactose and 2-deoxy-d-lyxo-hexose are substrates for yeast galactokinase. 2.
View Article and Find Full Text PDFCan Med Assoc J
April 1974
Surveillance of infections at the Ottawa General Hospital between September 1, 1971 and August 31, 1972 showed that the overall infection rate was 13.5% of which 5.6% was community-acquired while 7.
View Article and Find Full Text PDFAppl Microbiol
August 1972
Insoluble polyelectrolytes (PE60) were used for the concentration of viruses from stool specimens, confirming the results of Wallis et al. (1969). Ten percent suspensions inoculated with poliovirus type 3 were used in these experiments.
View Article and Find Full Text PDF1. 2-Deoxy-2-fluoro-d-glucose, 2-deoxy-2-fluoro-d-mannose and 2-deoxy-2,2-difluoro-d-arabino-hexose are good substrates for yeast hexokinase. 2.
View Article and Find Full Text PDFThe use of a "biological tracer" forms an essential part of many aerobiological experiments. Where release of such tracers is likely to result in deliberate or inadvertent human exposure, safety becomes a primary consideration in the selection of the tracer organism. Of the three most commonly used organisms, namely Bacillus subtilis, Escherichia coli, and Serratia marcescens, only the first comes near to satisfying the need for nonpathogenicity and even it has been incriminated as a cause of human infection, sometimes with a fatal outcome.
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