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Query: UMLS:C0042109 (urticaria)
 6,569 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The main goal of this paper is to call the attention of general practitioners and internists on the different affections which may involve urticaria as a clinical manifestations. A differential diagnosis of the causes of urticaria with an allergic and a nonallergic pathogenesis is made. Intestinal parasitism is among the first causes of urticaria. Six cases studied at the allergy service which had been referred from health areas or other hospital services are reviewed and reported. In these patients, a total regression of the clinical picture was achieved once intestinal parasitism was eradicated.
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PMID:[Urticaria as a clinical manifestation of intestinal parasitism]. 700 6

Twenty eight patients (18 men and 10 women) with delayed pressure induced urticaria were analyzed. The average age was 35.5 years, and the illness lasted 1-20 years, 4.07 years on average. The spontaneous cessation of illness came in 8 patients after approximately 5.75 years. In 23 patients there was also a classical chronic urticaria. C3, C4, alpha 1 antitrypsin, alpha 2 macroglobulin, immunoglobulin IgG, IgA, IgM and IgE were determined for 15 patients and findings were within normal limits apart from the moderate increase of IgE in 2 patients. Fifteen patients were examined for intestinal parasites and in 3 patients they were found. Also, a pathogenetic mechanism of illness was considered: the role of histamine, proteinase inhibitors, mediators of the delayed allergic urticaria.
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PMID:[Delayed-pressure urticaria--analysis of 28 patients]. 757 40

A 24-year-old woman had a 9-week history of second to third daily urticaria that began after an episode of contact urticaria to topical bufexamac. She was found to have an underlying gastrointestinal infection with Blastocystis hominis. This was thought to be clinically relevant as she had a history of mild chronic diarrhoea. After treatment of the Blastocystis hominis, her urticaria ceased. This could indicate the importance of performing stool microscopy and culture on all patients with chronic urticaria of unknown aetiology. The relationship of urticaria to intestinal parasites and the possibility that non-steroidal anti-inflammatory medications could act as cofactors that help precipitate an urticarial reaction is discussed.
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PMID:Chronic urticaria due to Blastocystis hominis. 1663 8

Although intestinal parasites are a possible cause of skin disorders, there are few case reports concerning the role of Blastocystis hominis in urticaria. To clarify this association, we determined the frequency of B. hominis genetic subtype in urticarial patients by stool culture and polymerase chain reaction (PCR) and evaluated the clinical and parasitological recovery of urticarial patients after treatment with metronidazole. Of 54 urticarial patients (group I), 18 (33.3%) were diagnosed as acute urticaria (group IA) and 36 (66.7%) were diagnosed as chronic (group IB). Thirty-three (61.1%) out of 54 urticarial (group I) patients were Blastocystis positive by stool culture and PCR. Out of these 33 patients, 21 were symptomatic and 12 were asymptomatic. The amoeboid form was found in 20 (95.2%) out of 21 symptomatic Blastocystis urticarial patients assuring their pathogenic potential. Of 50 normal control group (group II), four (8%) Blastocystis isolates were found with no amoeboid form. B. hominis subtype 3 was the only detected genotype in both groups. Of 20 symptomatic Blastocystis urticarial patients, 12 (60%) patients recovered symptomatically and parasitologically after one course of metronidazole. Recovery reached 100% on repeating the treatment for a second course with disappearance of the amoeboid form. It was concluded that acute urticaria of unknown etiology and chronic idiopathic urticaria patients who are resistant to the ordinary regimen of urticaria treatment might be examined for infection with B. hominis, in order to prescribe the proper specific anti-protozoan treatment.
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PMID:Association of Blastocystis hominis genetic subtypes with urticaria. 2092 13