Upper Respiratory Infections
PATHOGENS
- Many viral pathogens may cause upper respiratory tract infections (URTIs), > 200 known; below is only a partial listing:
 - Bacterial causes are less common than viral 
- Streptococcus pneumonia
 - Mycoplasma pneumonia
 - Haemophilus influenzae
 - Chlamydophilapneumoniae
 - Consider, especially in outbreak settings
 
 - For travelers within 14d, if appropriate 
- MERS (Arabian Penisula)
 - Avian influenza (SE Asia)
 - Histoplasma capsulatum
 - Coccidioides immitis
 
 
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Last updated: February 4, 2023
Citation
Auwaerter, Paul G. "Upper Respiratory Infections." Johns Hopkins ABX Guide, The Johns Hopkins University, 2023. Johns Hopkins Guides, www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540570/1/Upper_Respiratory_Infections. 
Auwaerter PG. Upper Respiratory Infections. Johns Hopkins ABX Guide. The Johns Hopkins University; 2023. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540570/1/Upper_Respiratory_Infections. Accessed November 3, 2025.
Auwaerter, P. G. (2023). Upper Respiratory Infections. In Johns Hopkins ABX Guide. The Johns Hopkins University. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540570/1/Upper_Respiratory_Infections
Auwaerter PG. Upper Respiratory Infections [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2023. [cited 2025 November 03]. Available from: https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540570/1/Upper_Respiratory_Infections.
* Article titles in AMA citation format should be in sentence-case
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T1  -  Upper Respiratory Infections
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BT  -  Johns Hopkins ABX Guide
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Johns Hopkins ABX Guide

