Immunization with leucocidin toxoid against staphylococcal infection.
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An outbreak of Staphylococcus aureus infections occurred following discontinuation of antiseptic cord care on a neonatal unit. Multiple phage types were involved. The most common site of infection was the umbilicus. In addition, there were two clusters of methicillin-resistant S. aureus (MRSA) infection and one due to Streptococcus pyogenes. The outbreak was rapidly controlled by the reintroduction of hexachlorophane powder for cord care.
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Staphylococcal postoperative toxic shock syndrome (PTSS) has been associated with a variety of surgical procedures. It is generally believed that the source of infection is acquired at or near the time of surgery. PTSS has been specifically associated with nasal packing, insertion of hardware, surgical drains, retained foreign materials, and breaks in sterile technique. Although PTSS has been associated with postoperative abscesses, development of PTSS after surgery of a pre-existing source of infection has not been described. We report a case of PTSS that developed after vertebral abscess drainage, and we review the literature to determine the incidence of PTSS due to preexisting staphylococcal infection.
The present study was undertaken to compare the technetium-99m labelled non-specific polyclonal human immunoglobulin (Ig) with 99mTc-labelled monomeric human immunoglobulin (m-Ig), 99mTc-labelled, protein A-purified, human immunoglobulin (A-Ig) and 99mTc-labelled monomeric, protein A-purified, human immunoglobulin (mA-Ig) as tracer agents for the detection of a thigh infection with Staphylococcus aureus. In vitro the binding of the various tracer agents to bacteria at various intervals was determined. For the in vivo evaluation, mice were infected and received one of the various labelled proteins. Scintigrams were made 0.25, 1, 4 and 24 h later. All 99mTc-labelled Igs bound to bacteria in vitro: the percentages of binding for the m-Ig (from 1 h onwards) and A-Ig and mA-Ig (from 3 h onwards) were significantly higher than that for Ig. The in vivo target-to-non-target (T/NT) ratios were significantly higher from 4 h onwards for all purified Igs than for Ig. Protein A-purified Igs yielded higher T/NT ratios than m-Ig. Furthermore, the amount of activity in the liver was significantly lower 24 h after administration of m-Ig, A-Ig and mA-Ig than after administration of Ig. It is concluded that in this experimental infection 99mTc-labelled monomeric Ig localizes a staphylococcal thigh infection better and faster than 99mTc-labelled unpurified Ig. However, the accumulation obtained with protein A-purified Ig or protein A-purified monomeric Ig was the highest of all tracer agents tested.
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