Carmen Sommer

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The effects of environmental stress conditions on the defense response of rainbow trout following a four week exposure to subacute levels of un-ionized ammonia or temperatures 5 C above and 5 C below the temperature optimum (15 C) were investigated. These experimental studies can serve as a model to evaluate the metabolic response of fish to external agents(More)
Murine histocompatibility antigens were solubilized from the spleens and lungs of C57BL/6 (H-2b) animals with hypertonic salt (3 M KC1). Aggregate-free soluble antigens were incubated with nonadherent lymph node cells from BALB/c (H-2d) mice for 18 hr prior to their use as responder cells in the mixed-lymphocyte reaction (MLR). It was found that the(More)
Migrating duck populations in Wisconsin were evaluated during a one-year period for exposure to Aspergillus fumigatis by two serodiagnostic methods: immunodiffusion and countercurrent immunoelectrophoresis. Peak antibody reactivity to sporulating culture extracts of the fungus was detected in serum samples collected in winter. Antibody levels did not differ(More)
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