[Detection of the level of antibodies against bovine leucosis virus in the cow milk by immune sensor]

An immune sensor based on the surface plasmon resonance (SPR) was developed for express diagnostics of bovine leucosis. Sensor used for detection of the level of antibodies against bovine leukaemia virus (BLV) in the milk serum. It was shown that immune sensor analysis is more sensitive, rapid and simple in comparison with the traditional AGID test. It was stated that the developed immune sensor may be used for performance of screening of bovine leucosis at the farms and the minimal dilution of the milk serum should be 1:20.

[Express diagnostics of bovine leucosis by immune sensor based on surface plasmon resonance]

An immune sensor based on the surface plasmon resonance (SPR) was developed for express diagnostics of bovine leucosis. The sensor was used for detection of the level of antibodies against bovine leukaemia virus (BLV) in the blood serum. The industrially manufactured BLV antigen for screening test in the agar gel immunodiffusion (AGID) required the additional purification in order to be used in immune sensor analysis. It was shown that immune sensor analysis was more sensitive, rapid and simple in comparison with the traditional AGID test. It was stated that the developed immune sensor was capable to be used for performance of bovine leucosis screening at the farms and the minimal dilution of the serum should be 1:500.

[Immobilization of immunoglobulins using lectins with an immune sensor method based on surface plasmon resonance]

The effect of different lectins upon the response of immune sensor based on surface plasmon resonance (SPR) was investigated. Lectins affinity to carbohydrates of the IgG can be used to increase the density and orientation of IgG molecules at their immobilisation on the sensor surface. Conditions were elaborated for enhancement of immune sensor response in comparison with that one for bare or preliminary treated with dodecanthiol thin gold sensor surface. It was shown that human IgG revealed maximal affinity to wheat germ lectin and mouse monoclonal antibodies and rabbit IgG--to helix pomatia lectin. Pig antibodies, similar to human IgG, showed the greatest affinity to wheat germ lectin.