Free-range chicken eggs as a bioindicator of dioxin contamination in Vietnam, including long-term Agent Orange impact

Kudryavtseva, A. D.; Shelepchikov, A. A.; Brodsky, E. S.

doi:10.1016/j.emcon.2020.02.003

Cited by 15 publications

(3 citation statements)

References 35 publications

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“…Birds can be widely exposed to residual dioxins from pollution associated with industrialization (Elliott et al 1989; Hart et al 1991; Kanan and Samara 2018), urbanization (Watanabe et al 2005; Kanan and Samara 2018), and agriculture (Gilbertson et al 1991; Kudryavtseva et al 2020). Natural sources of dioxins may also affect birds that prey on animals killed by or escaping forest fires (Komarek 1969; Bonta et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Irrespective of the source, dioxin is mainly acquired through the food chain; and once in the digestive system, dioxins are easily absorbed across the gut because of their lipophilic properties, leading to bioaccumulation in body lipids (Nosek et al 1992; Stephens et al 1995; Kudryavtseva et al 2020). Therefore, bird offspring can also be contaminated.…”

Section: Introductionmentioning

confidence: 99%

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Metabolic and Hematological Responses to Endotoxin‐Induced Inflammation in Chicks Experiencing Embryonic 2,3,7,8‐Tetrachlorodibenzodioxin Exposure

Amaral-Silva

Tazawa

Bícego

et al. 2020

Enviro Toxic and Chemistry

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Dioxin exposure during bird embryonic development disrupts immunity as well as mechanisms involved in energy metabolism, potentially affecting negatively acute-phase responses to pathogens. Thus, we hypothesized that embryonic exposure to 2,3,7,8-tetrachlorodibenzodioxin (TCDD) changes the metabolism and blood physiology of domestic chicks, affecting their physiological competence for responding to immune challenges. To test this hypothesis, we injected doses of 0, 1.5, and 3 ng TCDD/egg (based on survival experiments) on embryonic day 4 and then measured O 2 consumption and CO 2 production for metabolic rate, ventilation, and body temperature (T B) in 5-d-old chicks. Then, chicks were injected with lipopolysaccharide (LPS, endotoxin) or saline prior to repeating the physiological measurements. A second chick group exposed to identical TCDD and LPS treatments had blood partial pressure of oxygen, partial pressure of carbon dioxide, pH, bicarbonate concentration, lactate concentration, osmolality, hemoglobin concentration, red blood cell concentration, and hematocrit, as well as T B , analyzed at 1 and 5 h after LPS injection. Metabolism in chicks embryonically exposed to 1.5 and 3 ng TCDD/egg was up to 37% higher, whereas body mass of chicks exposed to 3 ng TCDD/egg was approximately 6% lower. Chicks embryonically exposed to 3 ng TCDD/egg challenged with LPS showed a relative persistent hypometabolism accompanied by elimination of the normal hematological and osmotic responses to LPS. We conclude that embryonic exposure to TCDD affects posthatching metabolism as well as impairs metabolic, hematological, and osmotic responses to LPS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metabolic and Hematological Responses to Endotoxin‐Induced Inflammation in Chicks Experiencing Embryonic 2,3,7,8‐Tetrachlorodibenzodioxin Exposure

Amaral-Silva

Tazawa

Bícego

et al. 2020

Enviro Toxic and Chemistry

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“…Previous papers have proved that eggs from free-range or organic, compared to cage production, are a bigger source of POPs (Roszko et al 2014;Pajurek et al 2019;Mikolajczyk et al 2022). Data from various parts of the world indicates that freerange eggs contribute significantly to the PCDD/F/DL-PCB dietary intake (Hsu et al 2010;Van Overmeire et al 2011;Lambiase et al 2017;Weber et al 2018;Kudryavtseva et al 2020;Petrlik et al 2022).…”

Section: Dietary Intake-risk For Consumersmentioning

confidence: 99%

Engine oil from agricultural machinery as a source of PCDD/Fs and PCBs in free-range hens

Pajurek

Mikołajczyk

Warenik-Bany

2022

Environ Sci Pollut Res

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Free-range hens spend most of their lives outdoors, resulting in their heavy exposure to environmental pollutants such as polychlorinated dibenzo-p-dioxin, dibenzofurans (PCDD/Fs), dioxin-like polychlorinated biphenyls (DL-PCBs), and non-dioxin-like polychlorinated biphenyls (NDL-PCBs). We present a case of contamination of free-range eggs that is previously unreported in the literature. The aim of our study was a source investigation after finding a high level of PCDD/Fs in samples of eggs from one of the inspected farms. Samples of hens’ eggs, muscles, and livers and the feeds and soils were analyzed. The results showed that the soil samples taken from the paddock contained high concentrations of PCDD/Fs and DL-PCBs expressed as toxic equivalents (TEQ) (72.9 ± 18.2 pg WHO-TEQ g−1 dry mas (d.m.)) and a high concentration of NDL-PCBs (207 ± 46.9 ng g−1 d.m.). The investigation found that the cause of the soil contamination was oil leaking from the farm’s tractor engine. The oil contained very high concentrations of PCDD/F and DL-PCBs (1013 ± 253 pg WHO-TEQ g−1 oil) and 5644 ng g−1 of NDL-PCBs. The source of the contamination was confirmed by the similarity of the PCDD/F and PCB profiles in the hen eggs and the soil contaminated by engine oil. The dietary intake of toxins resulting from consumption of the eggs is provided. For children, the consumption of contaminated eggs would result in an intake of double the tolerable weekly intake (TWI), while for adults, it would be approx. 60–70% of TWI.

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PCDD/Fs and Dioxin-like PCBs in Chicken Eggs and Soils in Dong Nai Province, Southern Vietnam: Impacts of Raising Methods and Nearby Pollution Sources

Nghiem

Hoang

Nguyen

et al. 2022

Bull Environ Contam Toxicol

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Free-range chicken eggs as a bioindicator of dioxin contamination in Vietnam, including long-term Agent Orange impact

Cited by 15 publications

References 35 publications

Metabolic and Hematological Responses to Endotoxin‐Induced Inflammation in Chicks Experiencing Embryonic 2,3,7,8‐Tetrachlorodibenzodioxin Exposure

Metabolic and Hematological Responses to Endotoxin‐Induced Inflammation in Chicks Experiencing Embryonic 2,3,7,8‐Tetrachlorodibenzodioxin Exposure

Engine oil from agricultural machinery as a source of PCDD/Fs and PCBs in free-range hens

PCDD/Fs and Dioxin-like PCBs in Chicken Eggs and Soils in Dong Nai Province, Southern Vietnam: Impacts of Raising Methods and Nearby Pollution Sources

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