Abstract
Embryonic cells from the “Kuroko” strain, a genetically well defined strain, of the silkworm, Bombyx mori, were cultured in vitro. In primary cultures, epithelial-like cells migrated and multiplied markedly. They contained large granules around their nuclei. This type of cells could be subcultured continuously, though their growth was comparatively slow. This cell line was found to be susceptible to B. mori nuclear polyhedrosis virus.
