IgG Check calf test has been used in this study to identify if a failure of passive transfer occurs in neonatal calves by measuring the level of IgG in blood. An adequate level of IgG measured in all calves at 48 hour...IgG Check calf test has been used in this study to identify if a failure of passive transfer occurs in neonatal calves by measuring the level of IgG in blood. An adequate level of IgG measured in all calves at 48 hours, 7 days and 14 days after birth showed level of IgG 1000 mg/dl. This level indicated that they have good passive transfer of immunity. Also, in this study colostrum quality fed to calves was detected using Brix Refractometer. The colostrum is of high quality as it contains 50 mg/ml of IgG. This Brix refractometer can be used on the farm level to estimate colostrum IgG content and monitoring colostrum feeding practices. Colostrum with high quality IgG could provide calves with enough IgG to attain successful passive transfer of immunity. Brix and Obione refractometers provide simple, rapid method for estimating IgG concentration on calf serum, thus considered to be the most common method for determining passive transfer failure.展开更多
目的对胶乳免疫比浊法(比对方法)检测总前列腺特异性抗原(total prostate specific antigen,tPSA)做性能验证,比较其与电化学免疫发光法(参比方法)检测结果的一致性。方法依据CNAS-GL037文件对比对方法检测PSA进行准确度、精密度、线性...目的对胶乳免疫比浊法(比对方法)检测总前列腺特异性抗原(total prostate specific antigen,tPSA)做性能验证,比较其与电化学免疫发光法(参比方法)检测结果的一致性。方法依据CNAS-GL037文件对比对方法检测PSA进行准确度、精密度、线性区间的验证;收集2021年5月至8月解放军总医院第二医学中心剩余血清样本225例,分别由比对方法及参比方法检测总PSA,并对检测结果进行一致性评价。用Passing-Bablok回归、一致性相关系数(CCC)、Bland-Altman图分析2种检测方法的一致性和偏差。结果比对方法检测国家标准物质4个浓度偏倚均在±5%以内,低于厂家声明的15%;重复性和实验室内精密度(CV)不超过2%;临床高低值样本验证1.20~98.12μg/L区间符合临床线性要求。比对方法与参比方法的相关性(r=0.994)、一致性(CCC=0.989)均较好;两种方法检测总PSA平均偏差为-0.617μg/L(-4.36%)。结论比对方法检测总PSA正确度、精密度、线性区间验证均符合要求,比对方法与参比方法检测总PSA具有较好的相关性和一致性。展开更多
文摘IgG Check calf test has been used in this study to identify if a failure of passive transfer occurs in neonatal calves by measuring the level of IgG in blood. An adequate level of IgG measured in all calves at 48 hours, 7 days and 14 days after birth showed level of IgG 1000 mg/dl. This level indicated that they have good passive transfer of immunity. Also, in this study colostrum quality fed to calves was detected using Brix Refractometer. The colostrum is of high quality as it contains 50 mg/ml of IgG. This Brix refractometer can be used on the farm level to estimate colostrum IgG content and monitoring colostrum feeding practices. Colostrum with high quality IgG could provide calves with enough IgG to attain successful passive transfer of immunity. Brix and Obione refractometers provide simple, rapid method for estimating IgG concentration on calf serum, thus considered to be the most common method for determining passive transfer failure.
文摘目的对胶乳免疫比浊法(比对方法)检测总前列腺特异性抗原(total prostate specific antigen,tPSA)做性能验证,比较其与电化学免疫发光法(参比方法)检测结果的一致性。方法依据CNAS-GL037文件对比对方法检测PSA进行准确度、精密度、线性区间的验证;收集2021年5月至8月解放军总医院第二医学中心剩余血清样本225例,分别由比对方法及参比方法检测总PSA,并对检测结果进行一致性评价。用Passing-Bablok回归、一致性相关系数(CCC)、Bland-Altman图分析2种检测方法的一致性和偏差。结果比对方法检测国家标准物质4个浓度偏倚均在±5%以内,低于厂家声明的15%;重复性和实验室内精密度(CV)不超过2%;临床高低值样本验证1.20~98.12μg/L区间符合临床线性要求。比对方法与参比方法的相关性(r=0.994)、一致性(CCC=0.989)均较好;两种方法检测总PSA平均偏差为-0.617μg/L(-4.36%)。结论比对方法检测总PSA正确度、精密度、线性区间验证均符合要求,比对方法与参比方法检测总PSA具有较好的相关性和一致性。