Table 1.

Number of reported infections in different urticaria subtypes published in PubMed (01.02.2009)

Pathogen	acute UR	chronic UR	cold UR	DPU	AE (histam.)	AAE	HAE
Bacteria
H. pylori	nd	+++	1	nd	+	+	++
Streptococcus spp.	+++	+++	nd	nd	+	nd	Nd
Staphylococcus spp.	++	++	nd	nd	nd	nd	Nd
Yersinia ent. (persist.)	nd	+++	nd	nd	nd	nd	Nd
Mycoplasma pneum.	+ (c)	nd	+	nd	nd	nd	Nd
Trichinella	nd	1	nd	nd	nd	nd	Nd
Plasmodium falcip.	+	nd	nd	nd	nd	nd	Nd
Viruses
HIV	nd	nd	+	nd	nd	nd	Nd
Influenza	+	nd	nd	nd	nd	nd	Nd
Adenovirus	+ (c)	nd	nd	nd	nd	nd	Nd
Enterovirus	+ (c)	nd	nd	nd	nd	nd	Nd
Rotavirus	+ (c)	nd	nd	nd	nd	nd	Nd
RSV	+ (c)	nd	nd	nd	nd	nd	Nd
Hepatitis A virus	+	nd	nd	nd	nd	nd	Nd
Hepatitis B virus	+	nd	+	nd	+	nd	Nd
Hepatitis C virus	nd	++	1	nd	nd	nd	Nd
Cytomegalovirus	+	+	+	nd	nd	nd	Nd
Epstein-Barr virus	+	+	nd	nd	+	nd	+
Parvovirus B19	+	nd	nd	nd	+	nd	Nd
Norovirus	1	1	nd	nd	nd	nd	Nd
Parasites
Blastocystis hominis	+	++	nd	1	1	nd	Nd
Giardia lamblia	nd	+	nd	nd	1	nd	Nd
Toxocara canis	nd	+	1	nd	nd	nd	Nd
Trichomonas vagin.	nd	1	nd	nd	nd	nd	Nd
Anisakis simplex	++	nd	nd	nd	nd	nd	Nd
Strongyloides sterc.	nd	+	nd	nd	+	nd	Nd
unspecified
rhinopharnygitis	+++	nd	nd	nd	++	nd	Nd
tonsillitis	nd	++	nd	nd	+	nd	Nd
sinusitis	nd	++	nd	nd	+	nd	Nd
dental infection	+	++	nd	nd	+	nd	Nd
urinary tract infection	++	++	nd	nd	+	nd	Nd

Number of publications:

1, if n = 1; +, if n = 2-10; ++, if n = 11-99; +++, if n ≥ 100; nd, not described

*Search strategy in PubMed: titles/abstract for the respective pathogen and "urticaria"

Items with "urticaria" in title/abstract: 8336

Abbreviations: UR, urticaria; DPU, delayed pressure urticaria; AE, angioedema; histam., histaminergic; AAE, acquired angioedema; HAE, hereditary angioedema; (c), children