Gadomska K, Zakrzewska K
W. Stefański Institute of Parasitology, Polish Academy of Sciences, Warszawa, Twarda.
Wiad Parazytol. 1997;43(1):79-88.
The aim of this study was to determine the action of zinc, copper, lead and cadmium compounds upon N. brasiliensis invasive nematode larvae. The tested larvae were kept in ZnCl2, CuCl2, Pb(NO3)2 and CdCl2 solutions. The concentrations of toxic substances applied for the study corresponded with level of environmental pollution. All toxins reduced life-space of larvae. In control group they survived about 69 days. In solutions of the Zn, contaminated with 10, 50, 100 and 200 ppm of toxic substance, they survived 42, 16, 14 days and 72 hours. In solution of Cu, contaminated with 5, 10, 50 and 200 ppm of toxin, life--space was reduced to 51, 21, 7 days and 54 hours, respectively. Lead reduced live--space of larvae to 26 days already at the low concentration of 10 ppm and in all higher concentrations (20, 50 and 200 ppm) their survival changed insignificantly (to 22 days). In solution of Cd, contaminated with 0.1 and 0.3 ppm larvae died after 39 and 17 days, respectively, while at higher concentrations of this toxin (3 and 10 ppm) larvae survived only 54 and 30 hours, respectively.
本研究的目的是确定锌、铜、铅和镉化合物对巴西日圆线虫侵袭性幼虫的作用。受试幼虫置于氯化锌、氯化铜、硝酸铅和氯化镉溶液中。研究中使用的有毒物质浓度与环境污染水平相对应。所有毒素均缩短了幼虫的存活时间。在对照组中，它们存活约69天。在分别被10 ppm、50 ppm、100 ppm和200 ppm有毒物质污染的锌溶液中，它们分别存活42天、16天、14天和72小时。在分别被5 ppm、10 ppm、50 ppm和200 ppm毒素污染的铜溶液中，存活时间分别缩短至51天、21天、7天和54小时。铅在低浓度10 ppm时就将幼虫的存活时间缩短至26天，在所有更高浓度（20 ppm、50 ppm和200 ppm）下，其存活率变化不显著（至22天）。在分别被0.1 ppm和0.3 ppm镉污染的溶液中，幼虫分别在39天和17天后死亡，而在该毒素的更高浓度（3 ppm和10 ppm）下，幼虫分别仅存活54小时和30小时。
