Risk factors for allergy due to the two-spotted spider mite (Tetranychus urticae) among table grape farm workers
Jeebhay, M.F., Baatjies, R., Chang, Y.-S., Kim, Y-K., Kim, Y-Y., Major, V., and Lopata, A.L. (2007) Risk factors for allergy due to the two-spotted spider mite (Tetranychus urticae) among table grape farm workers. International Archives of Allergy and Immunology, 144 (2). pp. 143-149.
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View at Publisher Website: http://dx.doi.org/10.1159/000103226
Background: Recent studies have reported an increased prevalence of respiratory symptoms among farm workers. The aim of this study was to identify risk factors associated with spider mite allergy among table grape farm workers.
Methods: A cross-sectional study of 207 workers in table grape farms was conducted. Skin prick tests used extracts of 8 common aeroallergens, grape mould (Botrytis cinerea) and Tetranychus urticae. Specific IgE to T. urticae was quantified using ImmunoCAP (Phadia). Erythrocyte cholinesterase levels were determined using the Test-mate ChE Cholinesterase Test System (model 460).
Results: The average duration of employment of workers was 10 years and 12% were pesticide crop sprayers. Work-related wheeze (26%), ocular-nasal (24%) and urticaria/skin symptoms (14%) were more prevalent in the orchards. The prevalence of sensitization (skin prick test) was highest to T. urticae (22%) followed by house dust mite (16%), with 25% being atopic. The prevalence of allergy to T. urticae (skin reactivity and work-related symptoms) was 9.5%, with respiratory allergy (6%) more common than skin allergy (3%). Work-related ocular-nasal (OR = 4.9) and skin (OR = 3.7) symptoms were more commonly reported by pesticide crop sprayers. Workers with T. urticae-allergic rhino-conjunctivitis and probable asthma were more likely to be atopic, spray pesticides and have low (<30 U/g hemoglobin) erythrocyte cholinesterase levels.
Conclusions: This study demonstrated that spider mite, T. urticae, is an important outdoor allergen among table grape farm workers. The increased risk of spider mite allergy appears to be related to high pesticide exposure among crop sprayers.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||occupational allergy, work-related asthma, spider mite, grape farmers, pesticides|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0601 Biochemistry and Cell Biology > 060199 Biochemistry and Cell Biology not elsewhere classified @ 100%|
|SEO Codes:||92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920108 Immune System and Allergy @ 100%|
|Deposited On:||28 Jan 2011 11:57|
|Last Modified:||30 Jul 2013 00:59|
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