[Effect of immunization on the in vivo immunocytes reaction to foreign particles in the larvae of the flesh fly Calliphora vomitoria].
Bacterial immunization of Calliphora vomitoria larvae induces hemocytic defense reaction in response to abiotic foreign particles injections. This reaction depends on the larval age and, consequently, the immunocytes composition. The juvenile plasmatocytes which are abundantly present in the end feeding and crop emptying larvae are initially very active and their reaction rate does not depend on the immunization. The plasmatocytes I appear after crop emptying. Immunization has a positive effect on their differentiation rate and, correspondently, the rapid progress in the defense response. The proportion of competent plasmatocytes in immunized larvae increases. The stable hyaline cells formation also depends on immunization, although elements of this response vary at different age steps. immunization of the end feeding and crop emptying larvae induces an increase in the percentage of hyaline cells, but alien particles injection does not provide additional stimulating effect. After crop emptying, immunization of wandering larvae ceases to exert an obvious direct influence, but significantly increases the sensitivity to charcoal injection. The emergence of foreign particles in the hemolymph of immunized wandering larvae causes a rapid increase in the number of hyaline cells due to prohemocytes and undifferentiated plasmatocytes differentiation.
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D000818:Animals; D002452:Cell Count; D002454:Cell Differentiation; D003031:Coal; D004175:Diptera / Q000276:immunology*; D004926:Escherichia coli / Q000276:immunology; D006434:Hemocytes / Q000166:cytology* / Q000276:immunology; D006458:Hemolymph / Q000276:immunology; D007114:Immunization; D016982:Micrococcus luteus / Q000276:immunology; D010587:Phagocytosis; D013045:Species Specificity
D003031:Coal