Lamellocyte differentiation in Drosophila larvae parasitized by Leptopilina

The presence of Leptopilina heterotoma or Leptopilina boulardi eggs in the hemocoel of a Drosophila melanogaster larva induces the differentiation of lamellocytes, the blood cells that encapsulate foreign objects. L. boulardi eggs are encapsulated by the newly differentiated lamellocytes, but L. heterotoma eggs are not. The induced lamellocytes in host larvae with L. heterotoma eggs undergo the same destructive morphological changes as reported previously for lamellocytes present in melanotic tumor mutant larvae at the time of parasitization. Thus, the virus-like particles produced by the L. heterotoma female to protect its eggs from encapsulation do not block the differentiation of lamellocytes, but rather destroy lamellocytes whenever they are present in the hemocoel.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30167/1/0000551.pd

Hemócitos fagocitários em larvas de Diatraea saccharalis (Fabricius) (Lepidoptera, Pyralidae) Phagocytic hemocytes in larval of Diatraea saccharalis (Fabricius) (Lepidoptera, Pyralidae)

<abstract language="eng">The ultrastructural observation of the hemocytes of D. saccharalis larvae showed different hemocyte tvpes in various stage of interaction with microorganisms, which were interpreted as bacteria. The microorganisms were observed either free in the hemolymph or into the insect hemocytes. The bacteria were detected mostly into lhe granulocytes and plasmatocytes: the spherule cells and the oenocytoids also presented intracytoplasmic microorganisms, but less frequently. The fagocytic capacity of the different hemocyte tvpes is discussed