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氟是动物体必需的微量元素,但摄入过量易导致中毒。氟中毒是一种多器官受损害性疾病,可引起机体广泛性的病理损害,造成多种机能和形态的异常改变,国内外就畜禽氟中毒引起的骨相和非骨相损伤已进行过大量的研究。近年来由于一些含高氟的劣质饲料原料进入市场,导致畜禽氟中毒的现象越来越多。贫血是氟病的一个征候,但对其产生的机理至今仍未阐明。为了探讨过量氟导致动物贫血产生的可能机理,现就高氟对鸡红细胞的影响进行综合阐述。1高氟对鸡红细胞数的影响李兴霞等首次报道了鸡氟中毒时红细胞的数量和血红蛋白含量会减少,且呈明显的剂量一效… 相似文献
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氟是动物体必需的微量元素,但摄入过量则易导致中毒。氟中毒是一种多器官受损害性疾病,可引起机体广泛性的病理损害,造成多种机能和形态的异常改变,国内外就畜禽氟中毒引起的骨相和非骨相损伤已进行过大量的研究。近年来由于一些含高氟的劣质饲料原料进入市场,导致畜禽氟中毒的现象越来越多。贫血是氟病的一个征候,但对其产生的机理至今仍未阐明。为了探讨过量氟导致动物贫血产生的可能机理,现就高氟对鸡红细胞的影响进行综合阐述。1高氟对鸡红细胞数的影响李兴霞等首次报道了鸡氟中毒时红细胞的数量和血红蛋白含量会减少,且呈明显的剂量—… 相似文献
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氟中毒病在我国呈自然分布带,主要分布于长江以北的华北、西北和东北,黑龙江省安达及三肇地区(肇东、肇源、肇州)处在我国东北分布带上,是我省氟中毒病的高发区。氟是动物体必需的微量元素,对牙齿、骨骼的形成与构成,以及钙磷代谢都有重要作用。然而,由于长期食用、饮水和空气介质吸入过量氟化物,而在体内蓄积引起中毒。氟中毒病是人畜共患病之一,也是我省畜禽一种常见多发的疾病,慢性氟中毒不仅造成病畜死亡,影响畜群生长发育,降低动物产品质量,给养殖业带来巨大的经济损失,还严重危害人类健康。我们多年从事畜禽氟中毒病的监测控制的研究… 相似文献
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慢性氟中毒又称氟病,是由于牛长期连续摄人超过安全限量的少量无机氟化物引起的一种以骨、牙病变为特征的中毒病,常见为氟斑牙和氟骨症.氟中毒是广泛流行的一种人畜共患的中毒病,其危害很大,直接影响着人类的健康和畜牧业的发展. 相似文献
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日粮氟水平对鸡血液生化指标影响的研究 总被引：2，自引：1，他引：1
日粮氟水平对鸡血液生化指标影响的研究朱基美吴玄光＊殷生章张小辉毕英佐（华南农业大学动物科学系，广东广州５１０６４２）氟是动物必需的微量元素之一，但摄入过量则导致中毒［１，２］。近年来，氟对动物生长或对骨相损害的报道颇多［３～８］，有研究指出，氟化物可... 相似文献
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1发病机理家畜有机氟中毒是指其误食氟乙酸钠、氟乙酰胺等有机氟杀鼠药引起的中毒。有机氟化合物在机体组织内活化为氟乙酸,经过一系列渗入作用使柠檬酸循环中断,组织细胞失去能量供给而发生损害。各种有机氟化合物经过消化道、呼吸道或破损皮肤被机体吸收后,经由血液运送到全身,在组织液中各种有机氟化物先进行活化,形成具有毒性的氟乙酸。 相似文献
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氟是动物机体的必需微量元素,适量的氟有利于骨骼、牙齿的生长,过量的氟则会引起机体慢性全身性中毒,主要影响骨骼、牙齿的正常生长,另外对消化系统、生殖泌尿系统、神经系统、内分泌系统和免疫系统也产生中毒影响。作者从氟中毒机制的国内外研究现状和进展出发,就过量氟化物对动物机体的影响进行综述,以期为动物氟中毒病相关研究提供参考。 相似文献
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Choubisa SL 《Veterinary research communications》1999,23(7):457-465
Chronic fluoride toxicity in the form of osteo-dental fluorosis was observed in cattle, buffaloes, sheep and goats from 21 villages of Banswara, Dungarpur and Udaipur districts of Southern Rajasthan where the mean fluoride concentration in drinking water varied from 1.5 to 4.0 ppm. The prevalence of dental fluorosis in calves (<1 year age) was greater than that in adult cattle and buffaloes. At a fluoride concentration in the water of 4.0 ppm, 100% of calves, 65.6% of buffaloes and 61.0% of cattle were found to be affected with dental fluorosis to varying degrees. In the older group of buffaloes, their teeth were brownish black instead of creamy yellow as found in calves and cattle. Out of 780 goats and 564 sheep, none revealed evidence of osteo-dental fluorosis. The overall prevalence of skeletal fluorosis was 8.5%, with the highest prevalence of 29.0% in cattle and 37.5% in buffaloes at a fluoride concentration of 3.2 ppm. None of the calves were affected with skeletal fluorosis. Intermittent lameness was observed in the older group of animals (>7 years age) at 2.8 ppm fluoride or more in the water. None of the fluorotic animals exhibited any apparent evidence of hypothyroidism, stunted growth or low milk production. There was no correlation between gender and the prevalence of fluorosis, but the prevalence and severity of skeletal fluorosis increased with increasing fluoride concentration and age. Possible factors causing variation in fluorosis in the cattle and buffaloes in villages with identical fluoride concentrations are discussed. 相似文献
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试验旨在研究还原型谷胱甘肽（reduced glutathione,GSH）对氟中毒小鼠附睾的影响。将50只3周龄ICR雄性小鼠随机分为5组,分别为对照组和4组染氟组。对照组饮用蒸馏水,染氟组分别供给含100 mg/L NaF的蒸馏水,自由饮水30 d。之后在染氟组中选择3组每日分别灌胃200、400和800 mg/（kg·只）GSH,同时各组小鼠再自由饮含氟水30 d。试验结束后,摘取小鼠附睾进行活性氧（ROS）、丙二醛（MDA）、GSH含量及谷胱甘肽过氧化物酶（GPx）、谷胱甘肽硫转移酶（GSTs）和谷胱甘肽还原酶（GR）活性检测,同时制作石蜡切片,HE染色后进行组织形态结构分析。结果显示,与对照组相比,100 mg/L NaF组精子密度、精子活力、GSH含量、GPx和GR活性均显著下降（P<0.05）,而GSH添加组较100 mg/L NaF组均有所升高;100 mg/L NaF组精子畸形率、ROS和MDA含量较对照组均显著升高（P<0.05）,而GSH添加组较100 mg/L NaF组均降低,其中800 mg/kg GSH组效果明显。与对照组相比,100 mg/L NaF组附睾头、附睾体及附睾尾管腔厚度升高,管腔内精子数量下降;GSH添加组附睾头、附睾体及附睾尾的管腔厚度与管腔内精子数量都有所恢复,其中800 mg/kg GSH组效果较好。综上所述,添加GSH后氟中毒小鼠谷胱甘肽抗氧化系统酶活性有所升高,附睾组织形态结构一定程度上有所恢复,对附睾有一定的改善作用。 相似文献
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Fluoride intoxication in dairy calves 总被引：2，自引：0，他引：2
Chronic fluoride intoxication in dairy cattle, caused by feeding fluoride contaminated commercial feed, was previously described in a dairy herd. Dental fluorosis and a catastrophic decrease in milk yield were the foremost findings. In calves born to the fluoride intoxicated cows, congenital fluorosis was manifested by brown discoloration of enamel, enamel hypoplasia, brown mottling of bone, severe retardation of cartilage cell differentiation, atrophy of osteoblasts, osteopenia, atrophy of bone marrow cells, serous atrophy of bone marrow fat and severely stunted growth. 相似文献
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Deciduous incisors from calves born to dams fed an average of 40 mg of fluoride/kg of forage ration (40 ppm) were compared with incisors from calves born to dams fed a normal dairy ration. Skeletal fluoride concentration in the calves born to fluoride-fed dams was increased 5 to 8 fold, but enamel mottling and hypoplasia, typical of permanent bovine incisor dental fluorosis were not seen by gross, histologic, or radiologic examination. Decreases in the amount of enamel on the tooth or hardness of the enamel were not observed. These data do not support recent reports of widespread dental fluorosis of deciduous bovine teeth as a clinical sign of fluoride toxicity. 相似文献