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.
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References
Kwon-chung KJ, Bennett JE. Medical Mycology. Philadelphia: Lea and Febiger, 1992.
Samson RA. A compilation of the Aspergilli described since 1965. Stud, Mycol 1979; 18: 1–38.
Raper KB, Fennell DI. The genus Aspergillus. Baltimore: Williams and Wilkins, 1965.
Vey A. Etude in vitro des reactions anticryptogamique des larves de Lepidopteres colloque sur les invertebrates, 1967. Ann Zool Ecol Anim 1969; 1: 93–100.
Vey A, Vago C. Reaction anticryptomique de type granulome chez les insects. Ann Inst Pasteur 1971; 121: 527–532.
Arnold JW Hinks CF. Insect haemocytes under light microscopy: techniques. In: Gupta, A.P. (ed.) Insect haemocyte development, forms, functions and techniques. Cambridge: Cambridge University Press, 1979, pp. 531–538.
Emmons CW; Binford CH, Utz JP, Kwon-chung KJ. Medical Mycology. 3rd ed. Philadelphia: Lea and Febiger, 1977.
Salt G. The cellular defence reactions of insects Cambridge Monograph in Experimental Biology No 16. London: Cambridge University Press, 1970.
Yeager JF. The blood picture of the southern army worm Prodenia eridania J Agric Res 1945; 71: 140.
Jones JC. A phase contrast study of the blood in Prodenia larvae. QJ Microsc Sci 1959; 100(1): 17–23.
Arnold JW. The haemocytes of insects. In M Rockstein (ed). The Physiology of Insecta. Vol V, 2nd edition. London, New York Academic Press, 1974, pp. 201–254.
Gupta AP. Arthropod haemocytes and phylogeny. In: A. P. Gupta (ed). Arthropod Phylogeny. New York Van Nostrand Reinhold. 1979, pp. 666–735.
Vinson SB. Immunosuppression in New direction in Biological control: Alternatives for suppressing Agricultural Pests and diseases. USA: Alan R Liss Inc. 1990, pp. 517–535.
Lackie AM. Cellular recognition of foreignness in two insect species, the American cockroach and the desert locust. Immunology 1979; 36: 909–915.
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Kulshrestha, V., Pathak, S. Aspergillosis in German cockroach Blattella germanica (L.) (Blattoidea: Blattellidae). Mycopathologia 139, 75–78 (1997). https://doi.org/10.1023/A:1006859620780
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DOI: https://doi.org/10.1023/A:1006859620780