Infectious Diseases
Acute Sinusitis
Acute rhinosinusitis is usually viral; identify the clinical patterns that increase the likelihood of bacterial disease, reserve imaging for complications or alternative diagnoses, and use watchful waiting or targeted antibiotics with defined reassessment and escalation thresholds.
First decision
Identify orbital, intracranial, and invasive disease before outpatient treatment
Escalate promptly when examination or host factors suggest disease beyond uncomplicated mucosal infection.
Do not manage as routine outpatient acute sinusitis when there is altered mental status, suspected meningitis or intracranial abscess, orbital cellulitis, intraorbital abscess, or cavernous sinus thrombosis. Persistent fever greater than 39°C is also a severe feature requiring reassessment for complicated disease. Arrange urgent specialty evaluation when these findings are present. ccjmccjmTroponins in acute coronary syndrome Alcohol and ...
Treat acute invasive fungal paranasal sinusitis as a surgical and systemic antifungal emergency in severely immunocompromised patients. IDSA recommends surgical debridement plus systemic antifungal therapy; voriconazole is preferred, with a lipid formulation of amphotericin B as an alternative. Debridement may need to be repeated, and extensive surgery is best deferred until thrombocytopenia resolves when feasible because postoperative hemorrhage risk is increased. IDSAIDSAAspergillosis
Refer patients with immunocompromise, obstructive anatomic defects, recurrent sinusitis, suspected fungal sinusitis, or suspected neoplasm for specialist assessment rather than repeated empiric outpatient antibiotic courses. ccjmccjmTroponins in acute coronary syndrome Alcohol and ...
Urgent escalation triggers: altered mental status; suspected orbital cellulitis or intraorbital abscess; cavernous sinus thrombosis; meningitis; intracranial abscess. ccjmccjmTroponins in acute coronary syndrome Alcohol and ...
High-risk invasive fungal context: severe immunocompromise with acute paranasal sinusitis. IDSAIDSAAspergillosis
Potential invasive fungal extension: proptosis or extension toward the orbit or brain. IDSAIDSAAspergillosis
| Finding or context | Most consequential concern | Next action |
|---|---|---|
| Altered mental status or suspected meningitis/intracranial abscess ccjmccjmTroponins in acute coronary syndrome Alcohol and ... | Intracranial complication ccjmccjmTroponins in acute coronary syndrome Alcohol and ... | Urgent specialty-directed evaluation. ccjmccjmTroponins in acute coronary syndrome Alcohol and ... |
| Orbital cellulitis, intraorbital abscess, or cavernous sinus thrombosis suspected ccjmccjmTroponins in acute coronary syndrome Alcohol and ... | Orbital or cavernous sinus complication ccjmccjmTroponins in acute coronary syndrome Alcohol and ... | Urgent specialty-directed evaluation. ccjmccjmTroponins in acute coronary syndrome Alcohol and ... |
| Severely immunocompromised patient with acute sinusitis IDSAIDSAAspergillosis | Acute invasive fungal paranasal sinusitis IDSAIDSAAspergillosis | Urgent surgical debridement plus systemic voriconazole or lipid amphotericin B. IDSAIDSAAspergillosis |
| Proptosis or possible orbit/brain extension IDSAIDSAAspergillosis | Chronic invasive or granulomatous aspergillosis; invasive extension IDSAIDSAAspergillosis | Specialist-directed diagnostic and surgical management with systemic antifungal therapy. IDSAIDSAAspergillosis |
Diagnosis
Use illness trajectory rather than isolated symptoms to diagnose bacterial disease
Most cases are viral, and purulence or facial pressure alone does not establish a bacterial infection.
Acute bacterial rhinosinusitis is a clinical diagnosis. Use one of three patterns: persistent nasal discharge or daytime cough for more than 10 days without improvement; severe illness for more than 3-4 consecutive days with fever at least 39°C and purulent nasal discharge or facial pain; or worsening/new fever, daytime cough, or nasal discharge after initial improvement from a viral URI lasting 5-6 days. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...Wolters KluwerHighlights From the Infectious Diseases Society... : Infectious Diseases in Clinical Practice
The decision threshold should account for the natural history of viral illness: uncomplicated viral URIs generally peak around days 3-6 and are resolving by approximately days 5-7, although residual symptoms can extend beyond 10 days. A nonresolving course, rather than duration alone, supports bacterial disease. acepacepIt’s Not Just the Sniffles: Approach to Diagnosis and Management of Sinusitis in the Pediatric Population | Pediatric Emergency Medicine
Overall clinician impression and dental pain are among the clinical findings most suggestive of acute bacterial rhinosinusitis; overall clinical impression has a positive likelihood ratio of 3.9. Use these findings to refine probability, but retain the trajectory-based criteria before committing to antibacterial treatment. Wolters KluwerWolters KluwerWhat are the most useful clinical findings for diagnosing ...
Persistent pattern: symptoms for more than 10 days without clinical improvement. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...Wolters KluwerHighlights From the Infectious Diseases Society... : Infectious Diseases in Clinical Practice
Severe pattern: fever at least 39°C with purulent nasal discharge or facial pain lasting more than 3-4 days. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...Wolters KluwerHighlights From the Infectious Diseases Society... : Infectious Diseases in Clinical Practice
Double-worsening pattern: new or worsening fever, cough, or nasal discharge after initial improvement of a 5-6-day viral URI. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...Wolters KluwerHighlights From the Infectious Diseases Society... : Infectious Diseases in Clinical Practice
Viral predominance: 90%-98% of rhinosinusitis cases are viral. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...
Workup
Avoid routine imaging in uncomplicated disease and image when the result changes disposition
Imaging does not distinguish routine viral from bacterial acute rhinosinusitis sufficiently to guide usual outpatient care.
Do not order sinus radiographs routinely for acute rhinosinusitis. Clinical criteria determine whether acute bacterial rhinosinusitis is likely, and routine imaging is not recommended in uncomplicated cases. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
Obtain targeted imaging when complications, an alternative diagnosis, or a high-risk process is suspected. CT detects isolated sphenoid sinus disease more consistently than plain films, whereas plain films can miss approximately half of sphenoid sinusitis cases; use this distinction when localizing suspected deep sinus disease rather than relying on routine radiography. WHOWHO::: Pakistan Armed Forces Medical Journal :::
In a patient with persistent or recurrent symptoms, separate acute episodes with complete clinical resolution from chronic rhinosinusitis. Chronic rhinosinusitis persists for at least 12 weeks, while recurrent acute disease is characterized by discrete episodes with symptom-free intervals and normalization between attacks. ScienceDirect+2ScienceDirectAllergic Fungal Sinusitis - an overviewScienceDirectSinus Headache - an overviewWHO::: Pakistan Armed Forces Medical Journal :::
Do not use sinus radiographs as a routine test for uncomplicated acute rhinosinusitis. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...
Use CT when suspected sphenoid disease, orbital/intracranial complication, neoplasm, or invasive fungal disease would change management. WHO+2WHO::: Pakistan Armed Forces Medical Journal :::ccjmTroponins in acute coronary syndrome Alcohol and ...IDSAAspergillosis
Reclassify symptoms persisting at least 12 weeks as chronic rhinosinusitis rather than acute bacterial rhinosinusitis. ScienceDirect+2ScienceDirectAllergic Fungal Sinusitis - an overviewScienceDirectSinus Headache - an overviewScienceDirectBacterial Sinusitis - an overview
Treatment
Choose observation or antibiotics based on bacterial pattern, severity, and follow-up reliability
Antibiotics offer limited benefit for many clinically diagnosed cases, so observation is a deliberate treatment strategy.
For uncomplicated acute bacterial rhinosinusitis with reliable follow-up, encourage watchful waiting. The American Academy of Otolaryngology-Head and Neck Surgery approach permits either antibiotics or a 7-day observation period, with antibiotics started if symptoms worsen or fail to improve. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine About 65% of patients thought to have acute bacterial rhinosinusitis who receive placebo improve spontaneously, supporting an observation option when follow-up is dependable. ccjmccjmTroponins in acute coronary syndrome Alcohol and ...
If antibiotic treatment is selected, prescribe amoxicillin or amoxicillin-clavulanate as first-line therapy. IDSA recommends amoxicillin-clavulanate after a clinical diagnosis of acute bacterial rhinosinusitis; clavulanate expands coverage for beta-lactamase-producing Haemophilus influenzae and Moraxella catarrhalis. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine A cited adult standard-dose regimen is amoxicillin-clavulanate 875 mg/125 mg orally twice daily for 7 days. cdn clinicaltrialscdn clinicaltrials[PDF] Clinical trial of the treatment of acute sinusitis with standard-dose vs ...
Avoid macrolides, including azithromycin, because Streptococcus pneumoniae resistance is approximately 40%. For penicillin-allergic adults, doxycycline or a respiratory fluoroquinolone, levofloxacin or moxifloxacin, are listed alternatives. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ... Reassess symptoms within 48-72 hours after starting amoxicillin-clavulanate; failure to improve should trigger diagnostic reassessment and an antibiotic change rather than simply extending the same regimen. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
Watchful waiting: use only for uncomplicated illness when reliable follow-up is available; begin antibiotics for worsening or failure to improve during a 7-day observation period. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
First-line options: amoxicillin or amoxicillin-clavulanate. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...
Cited adult amoxicillin-clavulanate regimen: 875 mg/125 mg orally twice daily for 7 days. cdn clinicaltrialscdn clinicaltrials[PDF] Clinical trial of the treatment of acute sinusitis with standard-dose vs ...
Do not use azithromycin empirically for acute bacterial rhinosinusitis because of high pneumococcal resistance. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...
Reassess 48-72 hours after antibiotic initiation. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
Treatment failure after initial antibiotics
When an adult treated with amoxicillin-clavulanate does not improve at reassessment, change therapy to high-dose amoxicillin-clavulanate, doxycycline, a respiratory fluoroquinolone such as levofloxacin or moxifloxacin, or clindamycin plus a third-generation oral cephalosporin. At the same visit, reconsider an alternative diagnosis, obstructive anatomy, recurrent disease, fungal disease, or neoplasm, particularly if symptoms are atypical or recurrent. ccjm+1ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicineccjmTroponins in acute coronary syndrome Alcohol and ...
Do not interpret lack of improvement as an automatic indication for repeat routine imaging; image when complications or an alternative structural diagnosis is suspected. ccjm+1ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicineccjmTroponins in acute coronary syndrome Alcohol and ...
Refer rather than serially change antibiotics when recurrent sinusitis, obstructive anatomy, fungal disease, immunocompromise, or neoplasm is suspected. ccjmccjmTroponins in acute coronary syndrome Alcohol and ...
Adjuncts
Use local symptom therapies selectively and recognize fungal phenotypes
Adjunctive treatment should not obscure deterioration or substitute for escalation in high-risk disease.
For acute bacterial rhinosinusitis, use nasal saline irrigation and intranasal glucocorticoids as adjuncts. IDSA does not recommend decongestants or antihistamines as adjunctive treatment for acute bacterial rhinosinusitis. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine Analgesics, including acetaminophen and nonsteroidal anti-inflammatory drugs, are symptomatic options during observation or alongside antibacterial therapy. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
Consider allergic fungal rhinosinusitis in chronic rather than routine acute presentations with nasal polyposis and characteristic eosinophilic mucin containing fungal hyphae. Fungal culture of nasal secretions is usually unhelpful because it commonly reflects airborne fungi rather than the causative process. Allergic fungal rhinosinusitis can produce ophthalmic involvement, bony erosion, or cavernous venous thrombosis, which should prompt specialty-directed evaluation. IDSAIDSAAspergillosis
Do not treat a chronic symptom pattern as repeated acute bacterial sinusitis. Chronic rhinosinusitis has evidence supporting saline lavage and intranasal steroids; this is a separate management pathway from short-course antibacterial treatment for acute bacterial disease. jacionline+1jacionlineChronic rhinosinusitis: Epidemiology and medical ...ScienceDirectBacterial Sinusitis - an overview
Adjuncts for acute bacterial rhinosinusitis: saline irrigation and intranasal glucocorticoids. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
Avoid routine decongestants and antihistamines as adjunctive therapy for acute bacterial rhinosinusitis under IDSA recommendations. ccjmccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine
For suspected allergic fungal rhinosinusitis, do not rely on nasal secretion fungal culture to establish causation. IDSAIDSAAspergillosis
| Pattern | Discriminator | Next step |
|---|---|---|
| Acute bacterial rhinosinusitis CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ... | Persistent >10 days without improvement, severe fever/purulence/facial pain pattern, or double worsening. CDCCDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ... | Observation with reliable follow-up or first-line amoxicillin/amoxicillin-clavulanate. CDC+1CDCOutpatient Clinical Care for Adults | Antibiotic Prescribing ...ccjmRhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine |
| Chronic rhinosinusitis ScienceDirect+1ScienceDirectBacterial Sinusitis - an overviewjacionlineChronic rhinosinusitis: Epidemiology and medical ... | Symptoms persist at least 12 weeks. ScienceDirectScienceDirectBacterial Sinusitis - an overview | Use chronic-rhinosinusitis evaluation and medical management; saline lavage and intranasal steroids have the highest level of evidence among cited treatments. jacionlinejacionlineChronic rhinosinusitis: Epidemiology and medical ... |
| Allergic fungal rhinosinusitis IDSAIDSAAspergillosis | Nasal polyposis with eosinophilic mucin and fungal hyphae; possible bony or ophthalmic complications. IDSAIDSAAspergillosis | Specialty-directed assessment; nasal secretion fungal culture is usually unhelpful. IDSAIDSAAspergillosis |
| Acute invasive fungal sinusitis IDSAIDSAAspergillosis | Severe immunocompromise with acute disease, with possible orbit or brain extension. IDSAIDSAAspergillosis | Urgent debridement plus systemic voriconazole or lipid amphotericin B. IDSAIDSAAspergillosis |
References
- The Distinction Between Cost and Charges — www.acpjournals.org · www.acpjournals.org
- Appropriate Antibiotic Use for Acute Respiratory Tract ... — www.acpjournals.org · www.acpjournals.org
- Highlights From the Infectious Diseases Society... : Infectious Diseases in Clinical Practice — journals.lww.com · journals.lww.com
- Diagnosing rhinosinusitis: Know your guidelines — journals.lww.com · journals.lww.com
- What are the most useful clinical findings for diagnosing ... — journals.lww.com · journals.lww.com
- Abstracts : Journal of Clinical Infectious Disease Society — journals.lww.com · journals.lww.com
- Allergic Fungal Sinusitis - an overview — www.sciencedirect.com · www.sciencedirect.com
- Sinus Headache - an overview — www.sciencedirect.com · www.sciencedirect.com
- Bacterial Sinusitis - an overview — www.sciencedirect.com · www.sciencedirect.com
- Rhinosinusitis - an overview — www.sciencedirect.com · www.sciencedirect.com
- Nasal headache — applications.emro.who.int · applications.emro.who.int
- ::: Pakistan Armed Forces Medical Journal ::: — applications.emro.who.int · applications.emro.who.int
- It’s Not Just the Sniffles: Approach to Diagnosis and Management of Sinusitis in the Pediatric Population | Pediatric Emergency Medicine — www.acep.org · www.acep.org
- Role of Topical Mytomycin C Application in Improving ... — applications.emro.who.int · applications.emro.who.int
- Rhinosinusitis and the role of imaging | Cleveland Clinic Journal of medicine — www.ccjm.org · www.ccjm.org
- Troponins in acute coronary syndrome Alcohol and ... — www.ccjm.org · www.ccjm.org
- [PDF] Clinical trial of the treatment of acute sinusitis with standard-dose vs ... — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov
- Outpatient Clinical Care for Adults | Antibiotic Prescribing ... — www.cdc.gov · www.cdc.gov
- Treating acute rhinosinusitis: Comparing efficacy and ... — www.jacionline.org · www.jacionline.org
- Research Protocol and Statistical Analysis Plan — cdn.clinicaltrials.gov · cdn.clinicaltrials.gov
- Is there a role for antibiotics in the treatment of chronic ... — www.jacionline.org · www.jacionline.org
- Rhinosinusitis: Developing guidance for clinical trials — www.jacionline.org · www.jacionline.org
- Chronic rhinosinusitis: Epidemiology and medical ... — www.jacionline.org · www.jacionline.org
- Aspergillosis — www.idsociety.org · www.idsociety.org