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Department of Microbiology University of Hong Kong Pathology Building Queen Mary Hospital Compound, Hong Kong
Department of Biochemistry Chinese University of Hong Kong Shatin New Territories Hong Kong
The 3 major lipoprotein fractions of human serum were investigated for their ability to inhibit the haemagglutination of 24 different togaviruses including rubella virus and arboviruses from 5 antigenic groups. All viruses were inhibited by the 3 fractions and this was most evident with low and very low density lipoproteins; inhibitory activity appeared to be associated with the lipid part of the lipoproteins. When artificial dispersions of the lipids cholesterol, cholesteryl ester and triglyceride were emulsified with egg lecithin three categories of inhibitory activity were observed which were independent of virus antigenic grouping category 1, no activity; category 2, activity confined to cholesterol and category 3, activity for cholesterol and to a lesser extent the other lipids.
Received 21 May 1976;
accepted 22 July 1976.
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