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More CRNI Study Materials – Study Guide, Practice Questions & Comprehensive Revision

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More CRNI Study Materials – Study Guide, Practice Questions & Comprehensive Revision

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Staphylococcus aureus - ANS ✔✔the most common gram-positive organism causing septicemia



Staphylococcus aureus

and

Enterococcus - ANS ✔✔the 2 most frequently involved pathogens in catheter-related infections
and sepsis



Intrinsic contamination - ANS ✔✔Contamination that occurs during the manufacturing process



Extrinsic Contamination - ANS ✔✔contamination with microorganisms DURING preparation or
administration



Endogenous contamination - ANS ✔✔Contamination caused by patient's own microflora



Primary endogenous infection - ANS ✔✔Infection caused by the patient's own flora

(e.g. placement of a tunneled catheter exit site near a patient's tracheostomy site may result in
a catheter infection from migration of the patient's own flora around the tracheostomy)

Intravenous catheter can become colonized by microorganisms from a distant site of infection



Secondary endogenous infections - ANS ✔✔Infection caused by modification of the patient's
own flora following prolonged antibiotic administration or Colonization with healthcare setting
flora



Primary causative organisms of intrinsic contamination - ANS ✔✔Enterobacteriaceae
(Enterobacter cloacae, Enterobacter agglomerans, Serratia marcescens, Klebsiella species)

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