Translator Disclaimer
1 August 2014 Histopathology of a Mesoparasitic Hatschekiid Copepod In Hospite: Does Mihbaicola sakamakii (Copepoda: Siphonostomatoida: Hatschekiidae) Fast Within the Host Fish Tissue?
Author Affiliations +
Abstract

Mihbaicola sakamakii is a mesoparasitic copepod that infests the branchiostegal membranes of groupers (Perciformes: Serranidae). In this study, we observed M. sakamakii within host tissue. Histologically, copepods were found enclosed inside a pouch composed of the thickened epidermis of the host, tightly encased on all sides by the host epidermal pouch wall. There were no host blood cells or other food resources in the pouch lumen. Since the host epidermis was intact and continuous, even in the vicinity of the oral region of the parasite, the copepod would not have access to the host blood in this state. However, the stomach (ampullary part of the mid gut) was filled with granular components, the majority of which were crystalloids that likely originated from fish erythrocyte hemoglobin. We supposed that the parasite drinks blood exuded from the lesion in the fish caused by copepod entry into the host tissue. Invasion of the parasite may elicit immune responses in the host, but there were no traces on the copepod of any cellular immune reactions, such as encapsulation. The array of minute protuberances on the copepod cuticle surface may be involved in avoidance of cell adhesion. After the lesion has healed, the copepod is enclosed in a tough epidermal pouch, in which it gradually digests the contents of its stomach and continues egg production.

© 2014 Zoological Society of Japan
Euichi Hirose and Daisuke Uyeno "Histopathology of a Mesoparasitic Hatschekiid Copepod In Hospite: Does Mihbaicola sakamakii (Copepoda: Siphonostomatoida: Hatschekiidae) Fast Within the Host Fish Tissue?," Zoological Science 31(8), 546-552, (1 August 2014). https://doi.org/10.2108/zs140064
Received: 28 March 2014; Accepted: 1 April 2014; Published: 1 August 2014
JOURNAL ARTICLE
7 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top