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  • Title: Phagocytic activity and encapsulation rate of Galleria mellonella larval haemocytes during bacterial infection by Bacillus thuringiensis.
    Author: Dubovskiy IM, Krukova NA, Glupov VV.
    Journal: J Invertebr Pathol; 2008 Jul; 98(3):360-2. PubMed ID: 18440019.
    Abstract:
    The bacterium Bacillus thuringiensis (Bt) is a pathogen of many insect species and is actively used in biocontrol. After the peroral inoculation of Galleria mellonella by the Bt in 5% sublethal concentration (LC(5)), a 1.5-fold increase in the phagocytic activity of infected larvae has been registered on the second and third days after the inoculation. With the increase of Bt-inoculum amount to 15% of sublethal concentration (LC(15)), a further increase of the phagocytic activity and enhanced encapsulation rates in the haemolymph of infected larvae has been observed. The enhanced cellular immunity during the bacteriosis seems to have resulted from the destruction of midgut epithelium cells followed by the subsequent exposure of gut content to lymph factors activating the immune system of haemocoel.
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