Differential Diagnosis for Mycoplasma and Herpes Rash
- Single most likely diagnosis
- Mycoplasma pneumoniae infection with rash: This is a common cause of atypical pneumonia, and a rash can be a presenting symptom in some cases, often accompanied by other symptoms like fever and cough.
- Other Likely diagnoses
- Herpes simplex virus (HSV) infection: HSV can cause a variety of rashes, including the characteristic herpetic lesions, and can sometimes be confused with mycoplasma infections due to overlapping symptoms.
- Infectious mononucleosis (caused by Epstein-Barr virus): This condition can present with a rash, fever, and other systemic symptoms, and can be considered in the differential diagnosis due to its potential to cause similar symptoms.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Stevens-Johnson syndrome: This is a severe skin and mucous membrane disorder that can be triggered by infections, including mycoplasma and herpes, and requires prompt recognition and treatment to prevent serious complications.
- Toxic epidermal necrolysis: Similar to Stevens-Johnson syndrome, this condition is a severe skin reaction that can be life-threatening if not recognized and treated promptly.
- Rare diagnoses
- Mycoplasma genitalium infection with rash: While less common than other mycoplasma infections, M. genitalium can cause a range of symptoms, including rash, in some cases.
- Leptospirosis with rash: This bacterial infection can cause a variety of symptoms, including rash, and should be considered in the differential diagnosis, especially in individuals with exposure to contaminated water or soil.