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Media Gallery

Sagittal section of the lateral nasal wall demonstrating openings of paranasal sinuses. Conchae have been cut to depict details of meatal structures.
Air-fluid level (arrow) in the maxillary sinus suggests sinusitis.
CT cuts for a limited CT study.

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Table 1. Dosage, Route, and Spectrum of Activity of Commonly Used First-Line Antibiotics*

Antibiotic	Dosage	*Streptococcus pneumoniae*			*Haemophilus influenzae*	*Moraxella catarrhalis*	Anaerobic bacteria
Antibiotic	Dosage	Sensitive	Intermediate	Resistant	*Haemophilus influenzae*	*Moraxella catarrhalis*	Anaerobic bacteria
Amoxicillin	500 mg PO tid	+++	++	+	++	+	+++ (except beta-lactamase producers)
Clarithromycin	250-500 mg PO bid	++	++	+	++	+++	+
Azithromycin	500 mg PO first day, then 250 mg/d PO for 4 days	++	++	+	++	+++	+
*+, low activity against microorganism; ++, moderate activity against microorganism; +++, good activity against microorganism

Table 2. Dosage, Route, and Spectrum of Activity of Commonly Used Second-Line Antibiotics*

Antibiotic	Dosage	*Streptococcus pneumoniae*			*Haemophilus influenzae*	*Moraxella catarrhalis*	Anaerobic bacteria
Antibiotic	Dosage	Sensitive	Intermediate	Resistant	*Haemophilus influenzae*	*Moraxella catarrhalis*	Anaerobic bacteria
Amoxicillin/ clavulanate	500 mg PO tid	+++	++	+	+++	+++	+++
Cefuroxime	250-500 mg PO bid	+++	++	+	+++	++	++
Cefpodoxime + cefixime	200 mg PO bid 400 mg/d PO	- ++	+++ -	++ -	+ +++	+++ +++	++ -
Ciprofloxacin	500-750 mg PO bid	++	+	+	++	+++	+
Levofloxacin	500 mg/d PO	+++	+++	+++	+++	+++	++
Trovafloxacin	200 mg/d PO	+++	+++	+++	+++	+++	+++
Clindamycin	300 mg PO tid	+++	+++	++	-	-	+++
Metronidazole	500 mg PO tid	-	-	-	-	-	+++
*+, low activity against microorganism; ++, moderate activity against microorganism; +++, good activity against microorganism; -, no activity against microorganism

Table 3. Dosage, Route, and Spectrum of Activity of Commonly Used Intravenous Antibiotics (Second-Line)*

Antibiotic	Dosage	Streptococcus pneumoniae †	*Haemophilus influenzae*	*Moraxella catarrhalis*	Gram-negative	Anaerobic bacteria
Piperacillin	3-4 g IV q4-6h	+++	+	-	+++	+++
Piperacillin/tazobactam	3.375 g IV q6h	+++	+++	+++	+++	++
Ticarcillin	3 g IV q4h	+++	-	-	+++	++
Ticarcillin/clavulanate	3.1 g IV q4h	+++	+++	-	+++	++
Imipenem	500 mg IV q6h	+++	+++	+++	+++	+++
Meropenem	1 g IV q8h	+++	+++	+++	+++	+++
Cefuroxime	1 g IV q8h	+++	+++	+++	++	++
Ceftriaxone	2 g IV bid	+++	+++	+++	+++	++
Cefotaxime	2 g IV q4-6h	+++	+++	+++	+++	++
Ceftazidime	2 g IV q8h	+++	+++	+++	+++	++
Gentamicin	1.7 mg/kg IV q8h	-	+++	+++	++	-
Tobramycin	1.7 mg/kg IV q8h	-	+++	+++	++	-
Vancomycin	1 g IV q6-12h	+++	-	-	-	++
*+, low activity against microorganism; ++, moderate activity against microorganism; +++, good activity against microorganism; -, no activity against microorganism †Does not take into account penicillin-resistant types.

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Author

Itzhak Brook, MD, MSc Professor, Department of Pediatrics, Georgetown University School of Medicine

Itzhak Brook, MD, MSc is a member of the following medical societies: American Association for the Advancement of Science, American College of Physicians-American Society of Internal Medicine, American Medical Association, American Society for Microbiology, Association of Military Surgeons of the US, Infectious Diseases Society of America, International Immunocompromised Host Society, International Society for Infectious Diseases, Medical Society of the District of Columbia, New York Academy of Sciences, Pediatric Infectious Diseases Society, Society for Experimental Biology and Medicine, Society for Pediatric Research, Southern Medical Association, Society for Ear, Nose and Throat Advances in Children, American Federation for Clinical Research, Surgical Infection Society, Armed Forces Infectious Diseases Society

Disclosure: Nothing to disclose.

Coauthor(s)

Brian E Benson, MD, FACS Founding Chair, Department of Otolaryngology-Head and Neck Surgery, Hackensack Meridian School of Medicine; Chief, Division of Laryngeal Surgery, Interim Chair, Department of Otolaryngology-Head and Neck Surgery, Attending Surgeon, Hackensack University Medical Center; Co-Chief, Division of Head and Neck Oncology, The John Theurer Cancer Center at Hackensack University Medical Center

Brian E Benson, MD, FACS is a member of the following medical societies: American Academy of Otolaryngology-Head and Neck Surgery, American College of Surgeons, New York Head and Neck Society, New York Laryngological Society

Disclosure: Nothing to disclose.

Linas Riauba, MD Assistant Professor of Clinical Medicine, Department of Medicine, Section of Infectious Disease, University Hospital, University of Medicine and Dentistry of New Jersey, New Jersey Medical School

Linas Riauba, MD is a member of the following medical societies: American Medical Association, Infectious Diseases Society of America

Disclosure: Nothing to disclose.

Chief Editor

Michael Stuart Bronze, MD David Ross Boyd Professor and Chairman, Department of Medicine, Stewart G Wolf Endowed Chair in Internal Medicine, Department of Medicine, University of Oklahoma Health Science Center; Master of the American College of Physicians; Fellow, Infectious Diseases Society of America; Fellow of the Royal College of Physicians, London

Michael Stuart Bronze, MD is a member of the following medical societies: Alpha Omega Alpha, American College of Physicians, American Medical Association, Association of Professors of Medicine, Infectious Diseases Society of America, Oklahoma State Medical Association, Southern Society for Clinical Investigation

Disclosure: Nothing to disclose.

Acknowledgements

Michael Cunningham, DO Sr Clinical Instructor, Department of Emergency Medicine, University of Rochester School of Medicine and Dentistry

Michael Cunningham, DO is a member of the following medical societies: American College of Emergency Physicians, American Osteopathic Association, Medical Society of the State of New York, and National Association of EMS Physicians

Disclosure: Nothing to disclose.

Tracey Quail Davidoff, MD Senior Clinical Instructor, Department of Emergency Medicine, Rochester General Hospital

Tracey Quail Davidoff, MD is a member of the following medical societies: American College of Emergency Physicians, American College of Forensic Examiners, American College of Physicians, and American Medical Association

Disclosure: Nothing to disclose.

Thomas E Herchline, MD Professor of Medicine, Wright State University Boonshoft School of Medicine; Medical Director, Public Health, Dayton and Montgomery County, Ohio

Thomas E Herchline, MD is a member of the following medical societies: Alpha Omega Alpha, Infectious Diseases Society of America, and Infectious Diseases Society of Ohio

Disclosure: Nothing to disclose.

Erhun Serbetci, MD Director, Department of Otolaryngology, Section of Nose and Sinus Surgery, Associate Professor, International Hospital of Istanbul, Turkey

Disclosure: Nothing to disclose.

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Medscape Salary Employment

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