OBJECTIVE: The objective of this study was to find sites in Vietnam where there was human exposure from Agent Orange herbicide sprayed between 1962 and 1971, as determined by congener-specific measurement of dioxins, including 2,3,7,8-tetrachlorodibenzodioxin (TCDD), the dioxin that contaminated Agent Orange, in blood. METHODS: Blood was collected from residents of eight heavily sprayed regions in the south of Vietnam and analyzed for TCDD and in some cases the dioxin-like dibenzofurans and dioxin-like PCBs. RESULTS: Six of the eight newly studied sites did not show substantial or any elevated TCDD in blood. Marked elevation of TCDD in Vietnamese blood was found in one new location with a suggestion of slightly elevated TCDD in a second location. CONCLUSIONS: In newly studied locations in Vietnam, we found some persons with elevation of TCDD consistent with exposure to dioxin from Agent Orange. In our previous studies, we found PCBs, PCDDs, and PCDFs as well as pesticides in human milk, blood, or in food. Health effects from Agent Orange need to be differentiated from effects caused by chemicals other than TCDD from Agent Orange.
OBJECTIVE: The objective of this study was to find sites in Vietnam where there was human exposure from Agent Orange herbicide sprayed between 1962 and 1971, as determined by congener-specific measurement of dioxins, including 2,3,7,8-tetrachlorodibenzodioxin (TCDD), the dioxin that contaminated Agent Orange, in blood. METHODS: Blood was collected from residents of eight heavily sprayed regions in the south of Vietnam and analyzed for TCDD and in some cases the dioxin-like dibenzofurans and dioxin-like PCBs. RESULTS: Six of the eight newly studied sites did not show substantial or any elevated TCDD in blood. Marked elevation of TCDD in Vietnamese blood was found in one new location with a suggestion of slightly elevated TCDD in a second location. CONCLUSIONS: In newly studied locations in Vietnam, we found some persons with elevation of TCDD consistent with exposure to dioxin from Agent Orange. In our previous studies, we found PCBs, PCDDs, and PCDFs as well as pesticides in human milk, blood, or in food. Health effects from Agent Orange need to be differentiated from effects caused by chemicals other than TCDD from Agent Orange.
Authors: Kaitlin J Basham; Christopher J Leonard; Collin Kieffer; Dawne N Shelton; Maria E McDowell; Vasudev R Bhonde; Ryan E Looper; Bryan E Welm Journal: Toxicol Sci Date: 2014-09-29 Impact factor: 4.849
Authors: Nathan E Rainey; Ana Saric; Alexandre Leberre; Etienne Dewailly; Christian Slomianny; Guillaume Vial; Harold I Zeliger; Patrice X Petit Journal: Sci Rep Date: 2017-07-05 Impact factor: 4.379