The Role of Hemocytes in Melanotic Tumor Formation

  • T. M. Rizki
  • Rose M. Rizki
Part of the Comparative Pathobiology book series (CPATH, volume 4)


The diseases of insects may be grouped in two main categories: those in which the pathological syndrome is generated by the presence of an inf ect ive agent, and those in which a genetic defect underlies the pathological condition. Hemocytes are involved in combating deleterious effects in both cases. In the case of infection we can be certain that the hemocytes are reacting to stimuli emitted by the presence of the infective agent. Cell-mediated defense responses of insects to foreign bodies in the hemocoel include phagocytosis and nodule formation by the hemocytes (Salt, 1970). Similar types of behavior are exhibited by hemocytes in some genetic diseases (Oftedal, 1953). However, in the latter cases, analysis of the pathological syndrome is complicated by the dif ficulty in determining whether the genetic lesion directly affects the hemocytes or the hemocytes are reacting to gene-conditioned disorders elsewhere in the body.


Juvenile Hormone Adipose Cell Infective Agent Hemolymph Sample Viruslike Particle 
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Copyright information

© Springer Science+Business Media New York 1978

Authors and Affiliations

  • T. M. Rizki
    • 1
  • Rose M. Rizki
    • 1
  1. 1.Division of Biological SciencesUniversity of MichiganAnn ArborUSA

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