Toxicity of Alum to Newzealand Rabbits

This study was considered to assess the risk of alum which is used in Sudan for drinking water treatment purposes for a long period without toxicity freedom records .Newzealand rabbits were chosen for animal phase trials, divided into 3 groups. One group was the undosed controls. Test groups were given alum at dose rates of 1% and 20% respectively for two groups after an adaptation period. Clinical signs were observed together with postmortem and histopathological examinations. Chemical investigations included enzymatic, metabolic, electrolyte and hematological changes. The test rabbits demonstrated low voice, inappitence, whitish salivation, watery diarrhea and recumbence followed by emphysematous, lungs, electrolyte imbalance, renal dysfunctions, stiff focal inflammation of the empty intestines and congested liver with white spots. The control group was normal .On atomic absorption only the lungs kept residual alum, while the livers washed- out the substance ,may be via bile .Alum -dosed rabbits showed necrosis in the cortex and medulla of the kidney, emphysema in the lungs and necrosis in the hepatocytes. On evaluation of the above results, alum was considered to be toxic to Newzealand rabbits at dose rates tried.

矾冰纳米乳的长期毒性试验

目的:观察矾冰纳米乳长期给药对家兔的毒性反应。方法:48只家兔,随机分为8组,即完整皮肤对照组(基质组)、完整皮肤矾冰纳米乳低、中、高剂量组,破损皮肤对照组、破损皮肤矾冰纳米乳低、中、高剂量组,每组各6只。各组连续皮肤涂药13周后进行常规观察、血液学、血液生化、系统尸检、组织病理学检查。结果:矾冰纳米乳各剂量组动物的外观行为、体重、脏器系数、血液学和血液生化指标与对照组比较无显著性差异,组织病理学检查未见明显异常。停药后也未见药物延迟性毒性反应。结论:矾冰纳米乳长期皮肤用药对家兔无明显毒性反应。