THE EFFECT OF DINITROPHENOL AND THYROXIN ON THE SUSCEPTIBILITY OF MICE TO STAPHYLOCOCCAL INFECTIONS

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Abstract
Mice were given daily per os amounts of dinitrophenol or of thyroid extract sufficient to prevent or retard the normal weight gain of uninfected animals, but not large enough to cause their death. When mice maintained on these regimens for 1 or 2 weeks were infected with staphylococci, most of them died within 12 days -much more rapidly than did mice fed a normal diet. Deaths occurred even when the organism injected was a non-virulent staphylococcus, unable to cause fatal disease in mice fed a normal diet. There was some suggestion that thyroid treatment interfered with the bactericidal mechanism in the liver, spleen, and kidneys of mice during the initial phase of infection. In contrast there was no clear evidence at any time thereafter that either thyroid extract or dinitrophenol caused the staphylococci to multiple more rapidly in the various organs.

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