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. 1975 Dec;12(6):1319–1324. doi: 10.1128/iai.12.6.1319-1324.1975

Increased susceptibility to bacterial infection as a sequela of exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin.

J E Thigpen, R E Faith, E E McConnell, J A Moore
PMCID: PMC415438  PMID: 173655

Abstract

The effects of subclinical levels of 2,3,7,8-tetrachloridibenzo-p-dioxin (TCDD) on the response of mice to infection with either Salmonella bern or Herpesvirus suis, also known as pseudorabies virus, are reported. TCDD is a contaminant of certain commercially useful chemicals, such as chlorinated phenols or herbicides. It has been shown to cause thymic atrophy and to suppress cell-mediated immunity in laboratory animals. Sublethal levels of TCDD were used: 0.5, 1,5, 10, or 20 mug/kg, given through a gastric tube once weekly for 4 weeks. A significant decrease in weight gain compared with control mice occurred at the 20-mug dosage. Dose schedules of 1 mug or more, followed by salmonella infection, resulted in significant increases in mortality and decreases in the time from infection to dealth. However, TCDD had no significant effect on mortality in the pseudorabies-infected mice. The most important finding in this study is that extremely low levels of TCDD, which do not produce clinical or pathological change, still have the capacity to affect host defense.

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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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