ISOLATION OF ROTAVIRUS FROM A SICK CALF AND OPTIMIZATION OF ITS CULTIVATION PARAMETERS

Abstract

The article is devoted to the isolation of rotavirus from a sick calf and optimization of its cultivation parameters in the transplanted lines of homologous and heterologous cell cultures. Rotavirus isolate was isolated in MDBK cell culture, which was confirmed in polymerase chain reaction and neutralization reaction, from the faeces of a sick calf. A method of culturing the isolated isolate in homologous (MDBK) and heterologous (SPEV) cell culture has been worked out. The cultivation of rotavirus in an alkaline medium and its treatment with trypsin at a concentration of 20 mcg/ml and the introduction of trypsin into a supportive medium (15 mcg/ml) led to an increase in the titer of the virus to 8.0–8.25 lg TCD50/ml. It was found that the accumulation of isolated rotavirus in the rollers led to an increase in the yield of the virus and an increase in its titer to 8.5 lg TCD50/ml. The isolated rotavirus isolate has antigenic properties and leads to the formation of an immune response when administered intramuscularly to rabbits.