EN
The influence of time and storage conditions on the stability of specific antibodies against EBLV was determined. The titer of antibodies was tested by use of the immunodiffusion test and ELISA. The sera in the lyophilized form with the addition of 0.01% sodium azide and 0.01% merthiolate were stored at + 4°C, — 20°C and at — 20°C after freezing and thawing. Sera with the above preparations stored at + 4°C were tested every three days for three weeks and the remaining sera every months for one year. The titers of the specific antibodies did not change their values in sera stored at + 4°C for 21 days, at — 20°C for 6 months. The most significant changes in serum titers were observed after several thawings and refrigerations.