Showing papers on "Zinc toxicity published in 1991"

Postsurgical mortality secondary to zinc toxicity in dogs.

Abstract: Zinc may be extremely toxic when absorbed from a metallic foreign body retained in the stomach. The most common cause of zinc toxicosis in dogs appears associated with accidental ingestion of copper-coated zinc pennies minted after 1982. In a retrospective literature search, zinc toxicosis due to penny ingestion was reported in 5 dogs, 2 of which died postoperatively, and 1 was euthanatized due to severe multiorgan system failure. In this report, we describe 3 additional cases of zinc toxicosis due to penny ingestion that resulted in a fatal outcome. Two dogs died during the early postoperative period, and another dog was euthanatized 5 d postoperatively due to continued deterioration. These cases emphasize the potential of perioperative complications associated with zinc toxicosis due to penny ingestion and suggest the need for better treatment options to decrease postsurgical mortality associated with this disease entity.

Interaction of soil zinc, calcium, and pH with zinc toxicity in peanuts

Abstract: Zinc (Zn) toxicity can be fatal to peanuts (Arachis hypogea L.) grown on high Zn soils, especially those with low pH values. The objectives of this study were to determine the influence of soil pH and soil Zn levels on Zn toxicity of peanuts and to predict the presence of Zn toxicity based on leaf or soil data. A greenhouse study was conducted with ‘Florunner’ peanuts using four soils of varying textures. Dolomitic limestone was applied to establish four pH levels ranging from 4.5-7.0 among soils. Zinc sulfate was applied at rates of 0, 10, 20 and 40 mg Zn kg−1 soil. Lime and zinc treatments were made to all soils in factorial combinations. Leaf and soil samples were taken periodically. Leaf Zn increased with increased soil Zn rates, but leaf Zn declined with increased pH levels. Leaf calcium (Ca) was reduced by soil Zn application in some cases. Leaf Zn and leaf Ca were both significantly correlated with the presence of Zn toxicity symptoms. When soil pH or soil Ca was included in models with soil Zn to predict leaf Zn from soil Zn, R-square values increased dramatically. A table was developed for the determination of target pH levels that should be reached in soils with specific soil Zn concentrations to avoid Zn toxicity problems.

Zinc accumulation in Monstera deliciosa near Brisbane

Abstract: Chemical analysis of leaf tissue of Monstera deliciosa with pronounced dark brown dots and dashes on the veins of the adaxial surface showed zinc concentrations five times higher than in tissues from unaffected plants, and zinc analysis of soil from near the affected plants showed very high levels of available zinc. It is proposed that the symptoms are caused by zinc toxicity.

The influence of zinc administration on the development of experimental lung metastases after an injection of tumour cells into the tail vein of rats.

Abstract: Rats having received drinking water enriched with zinc (zinc acetate, 22.8 mmol/l) developed significantly more pulmonal metastases after an i.v. injection of 5 x 10(5) cultivated cells of a benzpyrene-induced sarcoma than receiving normal drinking water. Zinc ions seem to promote the emigration, implantation and outgrowth of circulating tumour cells.