Changes in the haemocytes of bombyx mori larvae [Lepidoptera: bombycidae] in relation to Escherichia coli and bacillus thuringensis infection

Injection of Bombyx mori fifth instar larvae with non- pathogenic bacteria Escherichia coli and entomopathogenic bacteria Bacillus thuringeinsis affected in the total haemocyte count and changes in the different haemocyte population during bacterial infection. Cellular immunity responses of B. mori against bacteria and the hormonal regulation of immunity were also studied