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Chu LM, Rennie DC, Cockcroft DW, Pahwa P, Dosman J, Hagel L, Karunanayake C, Pickett W, Lawson JA. Prevalence and determinants of atopy and allergic diseases among school-age children in rural Saskatchewan, Canada. Ann Allergy Asthma Immunol 2014; 113:430-9. [PMID: 25129487 DOI: 10.1016/j.anai.2014.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 06/27/2014] [Accepted: 07/07/2014] [Indexed: 12/27/2022]
Abstract
BACKGROUND There have been few investigations of farming-related activities or specific characteristics resulting in the associations between those exposures and atopic disease. OBJECTIVE To study the associations between farm-associated exposures and atopic diseases. METHODS As part of a longitudinal study of lung health in rural residents, a cross-sectional baseline study was conducted in rural Saskatchewan, Canada. This included an initial survey phase followed by a clinical testing phase. A subsample of 584 children (grades 1-8) completed skin prick testing to assess atopic status. Atopy was defined as a positive reaction to any of 6 allergens (local grasses, wheat dust, cat dander, house dust mite, Alternaria species, or Cladosporium species) of at least 3 mm compared with the negative control. RESULTS Of those who completed clinical testing, the prevalence of atopy was 19.4%, that of hay fever was 8.8%, and that of eczema was 27.4%. Based on skin prick testing, sensitization was highest for cat dander (8.6%) followed by local grasses (8.2%) and house dust mite (5.1%). After adjustment for potential confounders, home location (farm vs non-farm) was not associated with atopic status. However, livestock farming was protective against atopy (adjusted odds ratio 0.38, 95% confidence interval 0.17-0.88). In contrast, current residence on a farm was associated with an increase in the likelihood of hay fever in these children (adjusted odds ratio 3.68, 95% confidence interval 1.29-10.45). Also, regular farming activities in the past year were associated with an increased risk of hay fever. CONCLUSION In children, livestock exposure has a protective effect on skin prick test positivity, whereas farm living and activities increase the risk of hay fever.
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Affiliation(s)
- Luan M Chu
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Donna C Rennie
- Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Donald W Cockcroft
- Department of Medicine, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - P Pahwa
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - J Dosman
- Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - L Hagel
- Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - C Karunanayake
- Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - William Pickett
- Department of Public Health Sciences, Queen's University, Kingston, Ontario, Canada
| | - Joshua A Lawson
- Canadian Center for Health and Safety in Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
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Zhou ZH, Yang HJ, Chen M, Lou CF, Zhang YZ, Chen KP, Wang Y, Yu ML, Yu F, Li JY, Zhong BX. Comparative Proteomic Analysis between the Domesticated Silkworm (Bombyx mori) Reared on Fresh Mulberry Leaves and on Artificial Diet. J Proteome Res 2008; 7:5103-11. [DOI: 10.1021/pr800383r] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhong-hua Zhou
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Hui-juan Yang
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Ming Chen
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Cheng-fu Lou
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yao-zhou Zhang
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Ke-ping Chen
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yong Wang
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Mei-lan Yu
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Fang Yu
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Jian-ying Li
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Bo-xiong Zhong
- College of Animal Sciences, Zhejiang University, Hangzhou 310029, P. R. China, College of Life Sciences, Zhejiang University, Hangzhou 310058, P. R. China, College of Life Sciences, Zhejiang University of Science and Technology, Hangzhou 310018, P. R. China, and Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, P. R. China
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