Aspergillosis in German cockroach Blattella germanica (L.) (Blattoidea: Blattellidae) |
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Authors: | Kulshrestha Vandana Pathak SC |
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Institution: | (1) Animal Physiology Laboratory, Department of Biological Sciences, Rani Durgavati University, Jabalpur –, 482 001, India |
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Abstract: | Natural infection of Aspergillus flavus was observed in adults of Blattella germanica. Though the adult insects exhibited
no external symptoms, they became hypoactive and later died. The dead and experimentally infected insects repeatedly yielded
Aspergillus flavus in culture on Czapek's medium. Direct microscopic observation of the tissues of infected insects revealed
fungal material. The blood films stained with Giemsa stain showed granulocytes (GRs) engulfing fungal hyphae. A remarkable
increase in GR and plasmatocyte (PL) counts occurred in differential haemocyte counts (DHCs) of the infected insects. Two
main types of immunological responses of the insect noticed were phagocytosis and encapsulation. DHC showed maximum involvement
of GRs and PLs in immune mechanism.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | Insect Blattella germanica Aspergillosis immune response phagocytosis encapsulation |
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