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. 1986 Feb;51(2):431–439. doi: 10.1128/iai.51.2.431-439.1986

Affinity purification of staphylococcal toxic shock syndrome toxin 1 and its pathologic effects in rabbits.

M W Reeves, R J Arko, F W Chandler, N B Bridges
PMCID: PMC262347  PMID: 3943896

Abstract

Toxic shock syndrome toxin 1 (TSST-1) was purified to apparent homogeneity by chromatofocusing and affinity chromatography. The amino acid composition of the toxin was very similar to that reported for TSST-1 by other investigators. The amino-terminal amino acid was serine. A partial specific volume of 0.73 ml/g was calculated for the toxin from the amino acid data, and a molecular weight of 19,200 +/- 1,300 was determined by hydrodynamic methods. New Zealand white rabbits of both sexes were equally susceptible to the lethal effects of the toxin; however, older rabbits (greater than 12 months) were far more susceptible than young adults or weanlings. The 50% lethal dose of TSST-1 in older rabbits was 50 to 60 micrograms/kg when injected subcutaneously and 20 to 30 micrograms/kg when injected intravenously. Enhancement of lethal endotoxin shock by TSST-1 could not be demonstrated when both toxins were injected subcutaneously; however, lethal shock did occur when endotoxin (10 micrograms/kg) was injected intravenously after TSST-1 had been injected by either the subcutaneous (50 to 60 micrograms/kg) or the intravenous (20 to 30 micrograms/kg) route. Endotoxin alone was not lethal at a dose of 500 micrograms/kg of body weight when injected subcutaneously. When injected intravenously, endotoxin at a dose of 500 micrograms/kg was not lethal in weanling males or in females in any age group; however, young (6 to 7 months) and adult (greater than 12 months) males were killed by endotoxin doses as low as 45 to 50 micrograms/kg. Histopathologic studies of rabbits by both sexes which died as a result of TSST-1 alone or in combination with endotoxin showed extensive damage to organs rich in lymphoid and mononuclear phagocytic cells such as the thymus, mesenteric lymph nodes, liver, and spleen. Severe congestion of these organs as well as erythrophagocytosis and lymphoid depletion in the spleen and mesenteric lymph nodes were noted. Congestion and hemorrhage were also found in the heart, lungs, trachea, and thymus. The systemic pathology produced by TSST-1 was strikingly similar to that seen in humans who had died of toxic shock syndrome and in rabbits with subcutaneous chamber inoculated with toxic shock case strains of Staphylococcus aureus. Rabbits that were not killed by the toxin suffered a very rapid and severe leukopenia followed by leukocytosis with a left shift. Lymphopenia was also noted as was a mild but persistent anemia. With the exception of the early leukopenia, very similar hematologic findings have been noted in humans with toxic shock syndrome.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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