Morphological, ultrastructural, and molecular description of Unicapsula fatimae n. sp. (Myxosporea: Trilosporidae) of whitespotted rabbitfish (Siganus canaliculatus) in Omani waters

Autor: Al-Jufaili, S.H.; Freeman, M.A.; Machkevskyi, V.K.; Al-Nabhani, A.; Palm, H.W. 2015
In:

Parasitology Research

Bandangabe: 115
ISBN: 0932-0113 (Print) 1432-1955 (Online)
DOI: DOI 10.1007/s00436-015-4851-y
Seite: 1173 - 1184
Jahr: 2016

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
Investigations regarding the parasite fauna of wild whitespotted rabbitfish (Siganus analiculatus) Park, 1797 revealed white, spherical, loosely attached cysts measuring 896
(375–1406) μm in diameter in the inner ndothelial wall of the esophagus and stomach. Mature spores inside these cysts corresponded to the original description of spores belonging to the genus Unicapsula Davis, 1924. Unicapsula fatimae n. sp.
spores were 6.23 (5.60–6.60) μmin length and 6.80 (6.12–7.39) μm in width. The length of large polar capsule was 2.62 (2.18–2.97) μmand width was 2.65 (2.32–2.90) μm, and the extended
large polar capsule filament length was 15.50 (11.71–19.99) μm. Transmission electron microscope images of the plasmodia
revealed a complex cyst structure that was unique among other Unicapsula spp. Ultrastructural details of the host–parasite interface
and developmental stages of a species from the
Unicapsula genus are described for the first time. Histology of an infected esophagus revealed some abnormalities and changes in the host tissue around the infection site, including hypertrophy
of host esophagus epithelial cells and hyperplasia of host glandular tubules. The parasite presented here has been added to
the genus Unicapsula using comparative morphological analysis and ultrastructural investigations supported by 18S small
subunit ribosomal DNA molecular analysis.

Ansprechpartner

Weitere Information im WWW

Zur Publikation: Mitarbeiter, Projekte
Weitere Publikationen im Forschungsteilschwerpunkt