A 12-Month Aerobiological Survey of Pollen in Riyadh

Al-Frayh, Abdulrahman; Reilly, H. Christine; Harfi, Harb A.; Hasnain, Syed M.; Thorogood, Richard; Wilson, J. Douglas

doi:10.5144/0256-4947.1989.443

Cited by 11 publications

(12 citation statements)

References 4 publications

(3 reference statements)

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“…[1][2][3] Few patients have never left the region, thereby developing local sensitivities only, but a Riyadh test panel (and later appropriate panels for other regions) would at least present the best opportunity to identify allergens likely to precipitate clinical reactions in rhinitis and asthma within the region.…”

Section: Discussionmentioning

confidence: 99%

“…2 Not surprisingly, this allergen group commonly provokes reactions in the local population. Artemisia vulgaris (mugwort) was included in the expanded panel, as it is a very potent allergen, and species of the genus Artemisia (e.g., A. scoparia and A. monosperma) are widespread in the desert outside Riyadh.…”

Section: Discussionmentioning

confidence: 99%

“…Materials for skin-testing were selected as representing the most common regional allergens from preliminary data from the Riyadh aerobiological study 2 and the fungal allergen and dust study 1 and were supplied by ALK Laboratories, Copenhagen, Denmark, using standardized special purity (SQ) material where possible. A small number of samples were also purchased from Greer Laboratories, USA.…”

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confidence: 99%

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Inhalant Allergens in Patients with Allergic Rhinitis in Riyadh

et al. 1989

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Inhalant Allergens in Patients with Allergic Rhinitis in Riyadh

et al. 1989

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“…Selection of allergens was based on local data from aerobiological studies and dust sample analysis in Saudi Arabia. 9,10 These represent the most common regional allergens. The allergen panel was grouped into indoor inhalants (dust and animal danders), fungal spores, pollens and food ingestants ( Table 1).…”

Section: Methodsmentioning

confidence: 99%

A Study of Clinical and Allergic Aspects of Rhinitis Patients in Riyadh

Mustafa

Gadelrab

1996

Ann Saudi Med

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Eighty consecutive patients presenting with variable nasal symptoms were investigated. Fifty-three (66.25%) were identified as allergic and 27 (33.5%) as having nonallergic rhinitis. Medical history and clinical examination alone seemed to be inadequate in establishing a diagnosis, since the main complaints, i.e., nasal itching, sneezing and runny nose, occurred with the same frequency in both groups. However, alternating nasal blockage and sneezing were more prominent in the allergic group (80.40%), while perennial symptoms were more evident in the nonallergic group (68%). There were no striking differences between the two groups in the occurrence of nasal septal deviation or in evidence of nasal polyps. In the allergic groups, sensitivities to indoor allergens, i.e., cockroaches, cat fur, house dust, as well as to pollens, were very prominent. Among the nonspecific provoking factors, dust, strong smells, smoke and stress seem to be important. Ann Saudi Med 1996;16(5) Patients with acute, recurrent or chronic nasal complaints continue to make up a large percentage of those seeking medical attention. The common presenting complaints are sneezing, runny nose, nasal itching and nasal obstruction. These are sometimes associated with secondary features involving the conjunctiva, oropharynx, middle ear, paranasal sinuses or general complaints of headache, malaise or irritabilities.1,2 Approximately 20% of patients with nasal symptoms are thought to suffer from nonviral rhinitis, of which 50% is probably allergic in origin. 3,4 Although there is usually no radical cure for these conditions, in most cases effective control of symptoms can be achieved once the type of rhinitis has been identified.In the majority of cases of rhinitis, specific and nonspecific environmental stimuli trigger the symptoms. These include allergens, temperature changes, odors, air pollutants, emotional upset or recumbency. Therefore, a comprehensive medical, environmental and lifestyle history is essential in establishing a specific trigger of patient symptoms. In most cases, a clue to the diagnosis can be reached, which is then further confirmed by appropriate investigations. This is the traditional approach because there is no satisfactory method for measuring nasal function. 5,6 The present study was undertaken in view of the changing nature of the Saudi environment, brought on by extensive agricultural and horticultural advances. The objective was to compare our findings with earlier studies 7,8 and examine any change in the pattern. Moreover, we compared the frequency of presenting complaints in the allergic and nonallergic group, as well as the role of specific and nonspecific factors. Patients and MethodsEighty consecutive patients, 45 males and 35 females, presenting with variable nasal symptoms to the ENT clinics at King Abdulaziz University Hospital (KAUH) and King Khalid University Hospital (KKUH) were included in this study.A comprehensive clinical history was taken from all patients, through a questionnaire. Clinical examination i...

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“…The allergen extracts were grouped into pollen allergens including tree, grass, and weeds: fungal spore allergens including a range of species indentified from spore traps in the region and indoor allergen group including insects, house dust mite (D. farinae) and animal danders (dog hair and cat fur), and cotton flock ( Table 1). Materials for skin testing were selected as representing the most common regional allergens from our studies in the region [9][10][11][12]. All SPT was conducted using standardized special purity (SQ) materials where possible.…”

Section: Spt Allergensmentioning

confidence: 99%

A Comparative Study of Immediate Skin Test Reactivity to Inhalant Allergens in Asthmatic Children of Two Different Regions in Saudi Arabia

et al. 1992

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The skin test reactivities to various inhalant allergens in asthmatic children from two different regions in Saudi Arabia were compared. One hundred-twenty subjects each from the Central and Western regions, representing different environmental features, were selected. Prick test reactivity to 24 common allergens were analyzed and compared. Seventy-one (59.2%) patients from Riyadh (Central region) showed positive skin reactions to one or more allergens, while 87 (72.5%) reacted positively to different allergens from Makkah (Western region). The distribution of skin test sensitivity revealed striking differences in the two groups. The most prominent were reactions to the house dust mite (D. farinae) which amounted to 56.3% and to fungal allergens, 31.1% in asthmatics from the Western region, while reactions to the same allergens in subjects from the Central region were 10% and 5.8%, respectively. Similarly, marked variations were noted with pollen grain allergens with 9.3% in Central region and 15.4% in the Western region. The study indicates the presence of different allergen profiles in the two regions and suggests the influence of climatic and environmental factors and their impact on sensitization of susceptible subjects.A Al-Frayh, MO Gad-El-Rab, A Al-Najjar, SM Hasnain, A Comparative Study of Immediate Skin Test Reactivity to

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A 12-Month Aerobiological Survey of Pollen in Riyadh

Cited by 11 publications

References 4 publications

Inhalant Allergens in Patients with Allergic Rhinitis in Riyadh

Inhalant Allergens in Patients with Allergic Rhinitis in Riyadh

A Study of Clinical and Allergic Aspects of Rhinitis Patients in Riyadh

A Comparative Study of Immediate Skin Test Reactivity to Inhalant Allergens in Asthmatic Children of Two Different Regions in Saudi Arabia

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