Table 1.

Etiology associations with HSP [1–3].

Bacterial:	Drugs:
Group A beta hemolytic	Quinolones
Streptococci
Staphylococcus aureus	Clarithromycin
Helicobacter pylori	Acetaminophen
Mycoplasma	Codeine
	Etanercept
Viral:
Hepatitis A	Tumors:
Hepatitis B	Non-small cell lung cancers
Hepatitis E	Prostate cancer
Herpes simplex	Lymphoma
Human parvovirus B19	Multiple myeloma
Varicella
Adenovirus	Genetic:
CMV	Alpha-1 antitrypsin deficiency
HIV	Familial Mediteranean Fever
	HLA-DRB1*01
Vaccinations	HLA-B35
MMR (mumps, measles
and rubella)
Pneumococcal	Parasites:
Influenza	Toxocara canis
Meningococcal
Hepatitis B

*This list is not a comprehensive list.