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Toxicity test designs false positives

Modified Buehler. Buehler (1964) developed the first test system to use an occlusive patch to maximize dermal exposure and to increase the test sensitivity (Buehler, 1964). Although, this assay is still insensitive for some xenobiotics that may not sufficiently traverse the epidermis, it is particularly useful for compounds that are either highly irritating by intradermal injection or cannot be dissolved or suspended in a form that is conducive to injection. Other advantages are that the test produces few false positives, rarely overpredicts the potency of sensitizers, and is less likely to produce limiting system toxicity or ulceration at the induction sites. Figure 15.4 shows the test design in its current (OECD) form. [Pg.573]


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