Not that it's a very appetizing choice, but I think I would go for "individually tested" over "group tested."

>I have personally seen a rectal thermometer on sale, where the package said "... individually tested", but I don't remember whether it was Johnson&Johnson. I thought it was something similar to Q-Tips.
>
>>My sister sent me this:
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>>On your way home from work, stop at your pharmacy and go to the thermometer section and purchase a rectal thermometer made by Johnson & Johnson
>>Be very sure you get this brand. When you get home, lock your doors, draw the curtains and disconnect the phone so you will not be disturbed.
>>Change into very comfortable clothing and sit in your favorite chair. Open the package and remove the thermometer. Now, carefully place it on a table or a surface so that it will not become chipped or broken.
>>Now the fun part begins.
>>Take out the literature from the box and read it carefully. You will notice that in small print there is a statement:
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>>'Every Rectal Thermometer made by Johnson & Johnson is personally tested and then sanitized.'
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>>Now, close your eyes and repeat out loud five times,'I am so glad I do not work in the thermometer quality control department at Johnson & Johnson.'
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>>HAVE A NICE DAY AND REMEMBER, THERE IS ALWAYS SOMEONE ELSE WITH A JOB THAT IS MORE OF A PAIN IN THE PETOOPER THAN YOURS!
>>