Final answer:
If redness and swelling were found around the test area when performing a predisposition test, the step that should NOT be taken is to continue the test as planned. Instead, it is important to discontinue the test and seek medical advice.
Step-by-step explanation:
If redness and swelling were found around the test area when performing a predisposition test, the step that should NOT be taken is to continue the test as planned. Redness and swelling are signs of inflammation, which indicate an allergic response. Continuing the test could lead to further discomfort and potential harm to the individual. Instead, it is important to discontinue the test and seek medical advice in order to address the allergic reaction appropriately. It is also important to document the findings for future reference so that healthcare professionals have a record of the reaction.