Replication of the factor in scrapie material that causes a decrease in polymorphonuclear neutrophils.
D000818:Animals; D001921:Brain / Q000382:microbiology; D001923:Brain Chemistry; D007958:Leukocyte Count; D008297:Male; D008722:Methods; D051379:Mice; D008810:Mice, Inbred C57BL; D009504:Neutrophils; D012608:Scrapie / Q000378:metabolism / Q000382:microbiology; D012756:Sheep; D013997:Time Factors