[The ratio between the level of the number of sheep botflies and the host immune response].

The dependence of indices of the larvae number and their biomass upon characteristics of the immune response in ELISA at organism and population levels of the Oestris ovis parasitic system is discussed. It was determined, that the majority of larvae distribution excerptions in the host population and the distribution of specific antibodies level indices in the serum blood of animals correspond to the model of the negative binomial distribution. The straight dependence of the parasitic larvae number on the specific antibodies level in the serum blood of host at the organism level of the parasitic system was not determined. The high correlative dependences of the mean number indices and of the distribution of larvae upon the mean value of extinction in the immunity enzyme reaction and upon the mean level of specific antibodies in the serum blood of the host population at the population level were determined. The control of the sheep bot fly larvae number is possible by the determination of the mean specific antibodies level in host population in ELISA.