Mercury Bioaccumulation in Eggs of Hens Experimentally Intoxicated with Methylmercury Chloride and Detoxified with a Humic-Aluminosilicate Preparation

Abstract

Eggs; humic-aluminosilicate preparation; mercury.Submitted: July/2014 Approved: March/2015 ABSTRACTThe aim of the study was to evaluate the effectiveness of preventivedetox preparation (P-dP) based on humic and aluminosilicate substances in the diet of laying hens (3% daily dose) previously intoxicated with methylmercury chloride (CH 3 ClHg, 5 mg Hg/kg feed mixture) for six weeks. Mercury content in the whole eggs of the group intoxicated with CH 3 ClHg increased compared to the control group: 488-fold after 1 wk, 622-fold after 2 wks, and 853-fold after 6 wks of intoxication. The use of P-dP in the group previously intoxicated with CH 3 ClHg reduced he mercury content of whole eggs by 18.4%, on average, whereas the average was 29.9% two weeks after the discontinuation of CH 3 ClHg and P-dP supply. Maximum Hg content in the whole egg was observed in group III (299.7 g), whereas the highest mercury level was obtained in the egg albumen.

Assessing Mercury Content in Plant and Animal Raw Materials in an Area Impacted by the Copper Industry

“…For example, an average of 7.06 mg·kg -1 of mercury was found in drinking water at a broiler farm in Saudi Arabia, which resulted in increased Hg concentration in liver samples of chickens up to a level of 1,167 µg·kg -1 [46]. Mercury also easily accumulates in egg content, liver, and muscles when methylmercury is presented in the feed [26]. This can be prevented to a limited extent when feed additives containing humic compounds and aluminosilicates are supplemented [26,47].…”

“…Mercury also easily accumulates in egg content, liver, and muscles when methylmercury is presented in the feed [26]. This can be prevented to a limited extent when feed additives containing humic compounds and aluminosilicates are supplemented [26,47]. Another solution is selenium supplementation.…”

“…The main sources of mercury in humans are marineorigin products, especially fish and fish products [23][24][25], although some quantities may come from animal production (milk, meat, eggs) -especially in industrial areas, or from animals fed with feed contaminated with mercury compounds [26][27][28][29]. Tables 1 and 2 show data concerning mercury content in various environmental components (air, soil, water, fuel, fertilizers, sewage, etc.)…”

Xenobiotics, toxic compounds, mutagens and carcinogens substances. Classification and regulatory challenges Ksenobiotyki, substancje toksyczne, mutagenne i kancerogenne. Klasyfikacja i aspekty prawne

“…Problematyka jest skomplikowana, np. tolerancja zwierząt jest bardzo zróżnicowana (w zależności od gatunku i wieku zwierząt), ponadto zachodzą różne interakcje (synergizm, antagonizm) na poziomie metabolicznym, w związku z czym różna jest biokumulacja tych związków w produktach pochodzenia zwierzęcego (mleko, mięso, jaja, wełna, miód) 2,[29][30][31][32][33] .…”

Content of Toxic Elements (Arsenic, Cadmium, Mercury, Lead) in Eggs from an Ethically Managed Laying Hen Farm

“…Several studies have shown that feed contaminated with toxic elements, such as arsenic, cadmium, mercury, and lead can determine the bioaccumulation in chicken tissues and eggs [3,4,[14][15][16][17]. As an example, a high content of lead has been detected in chickens' muscle, liver, kidneys, and eggs, particularly in industrialized regions [18], posing a potential threat to public health. Chickens are exposed to lead, mainly from contaminated soil, through various behaviours such as foraging, roosting, grooming, fighting, and dust bathing, as well as their diet.…”