Ochratoxin A in Rice Marketed in Lebanon

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dc.contributor.author Charara, Abeer
dc.date.accessioned 2022-06-22T08:18:39Z
dc.date.available 2022-06-22T08:18:39Z
dc.date.copyright 2021 en_US
dc.date.issued 2021-12-09
dc.identifier.uri http://hdl.handle.net/10725/13736
dc.description.abstract Rice is one of the world's most widely consumed foods. A. Circumdati, A. Nigri, P. verrucosum, and P. nordicumcan contaminate rice in subtropical and tropical hot and humid climates and secrete mycotoxins, like the toxic and carcinogenic ochratoxin A (OTA). Our research aims to investigate the amounts of OTA in packaged rice sold in Lebanon and the exposure to this toxin from rice consumption. A total of 105 packed white, parboiled, and brown rice bags were collected, with 86 of them coming from 43 different brands. OTA was measured using Enzyme-Linked Immunosorbent Assay (ELISA) technique. In parallel, two hundred participants completed a detailed food frequency questionnaire to determine rice consumption patterns and, as a result, OTA exposure levels from rice intake in Lebanon. OTA was detected in 105 out of 105 (100%) of the rice samples. The average concentration ± standard deviation of OTA was 0.42 ± 0.09 μg/kg. Contamination ranged between 0.02 and 4.98 μg/kg. Moisture content in all rice samples was below the limit (14%). Only 2 rice samples had an OTA level close to the EU limit (5 μg/kg) and were considered as outliers. A significant difference was found between both collections for the same brands (p<0.001). Rice type, packing season, packing country, country of origin, presence of a food safety management certification, grain size, and time between packing and purchasing had no significant effect on OTA in rice. Exposure to OTA from rice consumption in Lebanon was calculated as 0.02-4.89 ng/kg body weight/day with an average of 0.41 ng/kg body weight/day. Future studies should assess OTA in unpacked rice, and routine monitoring must be carried out to consider emerging brands in the Lebanese market. en_US
dc.language.iso en en_US
dc.subject Rice -- Nutrition -- Lebanon en_US
dc.subject Rice -- Analysis en_US
dc.subject Ochratoxins en_US
dc.subject Lebanese American University -- Dissertations en_US
dc.subject Dissertations, Academic en_US
dc.title Ochratoxin A in Rice Marketed in Lebanon en_US
dc.type Thesis en_US
dc.title.subtitle Occurrence and Exposure Level en_US
dc.term.submitted Fall en_US
dc.author.degree MS in Nutrition en_US
dc.author.school SAS en_US
dc.author.idnumber 201205272 en_US
dc.author.commembers Alwan, Nisreen
dc.author.commembers Karam, Layal
dc.author.department Natural Sciences en_US
dc.description.physdesc 1 online resource (xiii, 50 leaves): ill. (some col.) en_US
dc.author.advisor Hassan, Hussein
dc.keywords Rice en_US
dc.keywords Ochratoxin A en_US
dc.keywords ELISA en_US
dc.keywords Exposure level en_US
dc.keywords Lebanon en_US
dc.description.bibliographiccitations Includes bibliographical references (leaf 42-50) en_US
dc.identifier.doi https://doi.org/10.26756/th.2022.189
dc.author.email abeer.charara@lau.edu en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.php en_US
dc.publisher.institution Lebanese American University en_US
dc.author.affiliation Lebanese American University en_US

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