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The Adsorption of Phage by Staphylococcus spp.

Linda Barnard

University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics., U.K.

Phages for coagulase-negative staphylococci were adsorbed to heat-killed cells. The phages showed equal affinities for all the cells, which appeared to have an equal number of binding sites for all the phages tested. This number is estimated at 1.2 x 10⁶ sites/cell. Competition for binding sites could be demonstrated between a pair of phages. It is concluded that coagulase-negative staphylococci have only a single series of binding sites for phage, probably the outer 20% or so of the wall teichoic acids. These organisms therefore bind all ‘coagulase-negative’ phages whether or not they are sensitive to them.

Present address: Chelmsford College of Further Education, Chelmsford, Essex, U.K.

Received 1 May 1980; accepted 14 November 1980.