Morphological and Populational Characteristics of Hemocytes of Ornithodoros moubata Nymphs During the Ecdysial Phase

College

College of Science

Department/Unit

Biology

Document Type

Article

Source Title

Journal of Medical Entomology

Volume

40

Issue

6

First Page

770

Last Page

776

Publication Date

1-1-2003

Abstract

The ultrastructure and characteristics of hemocytes of argasid tick species, Ornithodoros moubata, during the ecdysdial phase are herein presented. Hemocyte classes/populations characterized based on their affinity with Giemsa stain and ultrastructural differences comprised the prohemocytes, nongranular cells (Nc), eosinophilic granular cells (Ec), basophilic granular cells (Bc), and unidentified cells. Significant changes/shift in the ratio of hemocyte classes/population was apparent in ticks before and after the ecdysial phase. The granule-scant basophilic granular cells (sBc) constituted the most abundant hemocyte population in the ecdysial phase. Nymphs in ecdysis showed increases in Nc and sBc and decrease in Ec, a phenomenon that was reversed in unengorged nymphs and adults ticks. The significant increase in total Bc population in ecdysis relative to nonengorged ticks clearly point to blastogenesis of Bc taking place during the ecdysial phase and Bc's important role in the process of tissue remodeling.

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Digitial Object Identifier (DOI)

10.1603/0022-2585-40.6.770

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