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The bacteria is usually within the cavity of the artificial implants (not detectable in blood or cultures) unit it becomes more severe. That is why it is always important to ask a pt whether he or she has had any artificial implants. If the WBC is elevated (suspect infxn from artificial implants before digging for answers eleswhere).

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Q: Bacteria are the second most common cause of artificial implant failures in humans. In these cases why isn't an infection usually detected from cultures of blood or tissue?
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