An enzyme-linked immunosorbent assay was done for the detection of immunoglobulin G and M (IgG and IgM) antibodies to Echinococcus granulosus in surgically proved cases of hydatidosis, especially pulmonary hydatidosis, by use of human hydatid cyst fluid antigen and soluble scolex antigen. This assay was compared with the following standardized techniques: the indirect hemagglutination test, the indirect immunofluorescent antibody test, and Casoni's intradermal test. The enzyme-linked immunosorbent assay, with either of the antigens (human hydatid cyst fluid or soluble scolex antigen), was more sensitive and specific than the other techniques in diagnosing cases of hydatidosis, especially hydatid disease of the lung.
Effect of thermal and light induced metastabilities on conductivity (σ) and thermopower (S) in phosphorus doped a-Si:H films has been studied. It has been found that although both conductivity and thermopower show a change upon fast quenching, the function Q=ln σ−eS/k does not change. This suggests that quenching results in a new frozen-in structure, in which the position of the Fermi level is changed, but there is no change in the potential fluctuations. No measurable effect of light soaking is observed in our films.
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