A new dot immunogold filtration assay (DIGFA) technology to detect circulating anti-schistosome antibodies in livestock was carried out for evaluation of its sensitivity, specificity, and consistency.

斑点金标免疫渗滤新技术(简称金标法)检测家畜血吸虫病抗体，在本省进行了特异性、敏感性、符合率等试验。

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Conduskm: in this study, a high number of gastrointestinal malignancies patients have circulating CEA specific antibodies in their sera and these antibodies may be used as diagnostic markers.

结论：胃肠道癌患者血清中抗癌胚抗原(CEA)抗体的检出率较高，这些抗体可作为胃肠道癌的一种肿瘤标志物。

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Methods:A double mono-clonal antibody sandwich enzyme-linked immunosorbent assay(ELISA)was used to detect the circulating antigens, antibodies and immune complex in 109 sera of neurocysticercosis.

方法：用ELISA法检测109例脑囊尾蚴病患者血清抗原、抗体及循环免疫复合物。

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Now, we're not thinking about total antibody concentration because you already have a lot of antibodies circulating within your blood and in your fluids.

现在,我们先不考虑抗体总浓度,因为你的体内已存在许多抗体,在血液以及体液中循环

耶鲁公开课 - 生物医学工程探索课程节选

Antibodies are outside of cells circulating in your extracellular fluid.

抗体在细胞外的 细胞外液中循环

耶鲁公开课 - 生物医学工程探索课程节选

Surprisingly, the child had no detectable circulating virus, no detectable anti-HIV antibodies, and was clinically healthy.

WHITEHOUSE: Prevention and Treatment of HIV Infection in Infants Born to Infected Mothers: Need for a Fresh Look | The White House

By mimicking the conditions created by melanomas, they showed that in the presence of tumour cells, the immune system sent out IgG4 antibodies, but when faced with healthy cells it functioned as expected with IgG1 circulating.

BBC: Skin cancer 'able to fight off body's immune system'