The application discloses an application of a
nuclear receptor target gene in preparation of a biological preparation for blocking activation of
diapause larvae, and relates to the field of
biotechnology and parasite prevention and control. According to two
nuclear receptor targets of Haemonchus contortus HCON_00101910 (regulating activity of worms) and HCON_00023750 (regulating development of larvae), the two
nuclear receptor targets are combined with host progesterone and estradiol and are activated, constitute a key
signal path in the spring activation process of
diapause larvae, and have no homologous genes in mammals, and the safety is excellent. By constructing specific shRNA
lentivirus vectors (the silencing efficiency is all greater than or equal to 60%) targeting the two genes, single target or double target synergistic intervention is realized, and the activity-development double key links of worms in the host body can be specifically blocked. The application provides a new paradigm of preventive prevention and control with high specificity and green safety, and provides core
technical support for solving the seasonal epidemic problem of blood fluke
disease.