Acinetobacter Workup

Updated: Nov 27, 2018
  • Author: Shirin A Mazumder, MD; Chief Editor: Michael Stuart Bronze, MD  more...
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Workup

Laboratory Studies

A CBC count is nonspecific, and leukocytosis, even with a left shift, cannot be used to differentiate infection from noninfection or bacterial infection from nonbacterial infection. The CBC count cannot be used to differentiate infection from colonization.

Culture of the appropriate body fluid that is properly transported, plated, and incubated grows A baumannii.

Recovery of the organism from a nonsterile body site (eg, endotracheal secretions, urine in patients with a Foley catheter) does not indicate or imply an infectious pathogenic role.

In outbreaks, Acinetobacter is easily cultured from monitoring devices or biological fluids from multiple patients as part of an epidemiological investigation.

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Imaging Studies

Chest radiography and/or CT scanning or MRI of the chest may be useful in defining the extent of a nosocomial pneumonia caused by any organism.

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Other Tests

Tests are related to the organ system involved.

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Procedures

CSF culture is necessary if shunt-associated or ventricular drain–associated meningitis is suspected.

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Histologic Findings

Histological changes caused by Acinetobacter infection are indistinguishable from those caused by other aerobic gram-negative bacilli, except those associated with vessel invasion and cavitation, eg, Klebsiella pneumoniae and P aeruginosa.

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