Differential Diagnosis for a 5-month-old with RSV and CRP 120.200
- Single most likely diagnosis:
- Bronchiolitis: This is the most likely diagnosis given the patient's age and positive RSV test. The elevated CRP suggests a significant inflammatory response, which is consistent with bronchiolitis.
- Other Likely diagnoses:
- Pneumonia: The elevated CRP and RSV positivity could also suggest a bacterial pneumonia, especially if the patient has other symptoms such as fever, cough, or difficulty breathing.
- Viral pneumonia: Other viral pathogens could be causing the pneumonia, and the elevated CRP would be consistent with this diagnosis.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.):
- Bacterial sepsis: Although less likely, bacterial sepsis is a life-threatening condition that requires prompt diagnosis and treatment. The elevated CRP could be indicative of a bacterial infection, and it is crucial to rule out sepsis.
- Meningitis: Although the patient's symptoms do not specifically suggest meningitis, it is a potentially deadly condition that can present with non-specific symptoms in young children. It is essential to consider meningitis in the differential diagnosis, especially if the patient has a fever or other concerning symptoms.
- Rare diagnoses:
- Pertussis: Although less common, pertussis (whooping cough) can cause significant respiratory symptoms and elevated CRP in young children.
- Congenital heart disease with infection: In rare cases, congenital heart disease can increase the risk of infection, and the elevated CRP could be indicative of an underlying cardiac condition with superimposed infection.