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292 appendix 3<br />

Infection Common Pathogens Patient/Infection Factors Initial Empiric Therapy Options<br />

Communityacquired<br />

meningitis<br />

Healthcareassociated<br />

infectious<br />

diarrhea<br />

Communityacquired<br />

infectious<br />

diarrhea<br />

Streptococcus pneumoniae<br />

Neisseria meningitidis<br />

As above plus:<br />

Listeria monocytogenes<br />

Otherwise healthy, 2–50<br />

years of age<br />

. 50 years of age or<br />

immunocompromised<br />

Ceftriaxone<br />

-Plus-<br />

Vancomycin<br />

Ceftriaxone<br />

-Plus-<br />

Vancomycin<br />

-Plus-<br />

Ampicillin<br />

C. difficile Mild-moderate infection Metronidazole (oral)<br />

Severe infection Vancomycin (oral) or Fidaxomicin<br />

Shigella<br />

Salmonella<br />

Escherichia coli<br />

Campylobacter<br />

C. difficile (uncommon)<br />

Severe, complicated infection<br />

(e.g., ileus)<br />

Vancomycin (oral)<br />

-Plusintravenous<br />

metronidazole<br />

See above Fluoroquinolone or TMP/SMX if antibiotic<br />

therapy is necessary

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