Environmental Exposures During Childhood And The Subsequent Development Of Crohn?s Disease In The Western Cape South Africa | 29421
Journal of Gastrointestinal & Digestive System
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Over recent years, the paradigm of the ?hygiene hypothesis? has gained wide attention as computerized DNA sequencing
technologies revolutionize how we view the human microbiome. We performed a case control study of all consecutive
Crohn?s disease (CD) patients seen at 2 large inflammatory bowel disease (IBD) referral centers in the Western Cape, South Africa
between September 2011 and January 2013. Numerous environmental exposures during three age intervals; 0-5, 6-10 and 11-
18 years were extracted using an investigator-administered questionnaire. One year later, participants completed questionnaire
for a second time, in order to measure the agreement between repeated data, using a kappa statistic (?=0.60-0.99). On multiple
logistic regression analysis, individuals who did not consume raw beef during childhood, did not consume unpasteurized milk,
those who never had a donkey, horse, cow or sheep living permanently on the property, those whose primary water source
was bottled or tap water, as well as those exposed to passive cigarette smoke during childhood, were significantly more likely
to develop future CD. However, the inconsistencies between each age interval with regard to the identified risk factors suggest
that their effect on the development of immune structures varies according to timing and extent of exposure, although this
outcome may be influenced by CD susceptibility mutations. Significant differences in CD susceptibility genotype have been
observed between the white, colored and black ethnicities in South Africa. When evaluating the interaction with ethnicity, the
passive smoke risk-association exposure maintained significance for colored CD subjects, but not for their white counterparts.
Abigail Basson has completed her PhD from the University of the Western Cape, South Africa, where she is presently a Lecturer of Nutrigenomics and Medical
Nutrition Therapy. She received her MSc degree in Nutrition Science from New York University (USA) and also holds a Postgraduate qualification in Nutrigenomics
from the University of Arizona. She has authored several publications in reputed journals and is serving as an Editorial Board Member of repute.
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