A Gallbladder Ceratomyxidae (Myxozoa: Bivalvulida) Parasite Described In Pimelodella cristata (Müller & Troschel, 1848) From the Eastern Amazon.

Autor: de Carvalho AA; Postgraduate Programme in the Biology of Infectious and Parasitic Agents (BAIP), Federal University of Pará (UFPA), State of Pará, Belém, Brazil., da Silva Ferreira RL; Postgraduate Programme in the Biology of Infectious and Parasitic Agents (BAIP), Federal University of Pará (UFPA), State of Pará, Belém, Brazil., de Oliveira Nascimento LS; Morphophysiology and Animal Health Laboratory, State University of Amapá, State of Amapá, Macapá, Brazil., Morais SC; Morphophysiology and Animal Health Laboratory, State University of Amapá, State of Amapá, Macapá, Brazil., de Araujo RF; Animal Histology and Embryology Laboratory, Federal Rural University of the Amazon (UFRA), State of Pará, Belém, Brazil., de Almeida Costa M; Morphophysiology and Animal Health Laboratory, State University of Amapá, State of Amapá, Macapá, Brazil., Videira MN; Morphophysiology and Animal Health Laboratory, State University of Amapá, State of Amapá, Macapá, Brazil. videiravet@gmail.com., Giese EG; Animal Histology and Embryology Laboratory, Federal Rural University of the Amazon (UFRA), State of Pará, Belém, Brazil.
Jazyk: angličtina
Zdroj: Acta parasitologica [Acta Parasitol] 2024 Oct 10. Date of Electronic Publication: 2024 Oct 10.
DOI: 10.1007/s11686-024-00930-y
Abstrakt: Purpose: The Myxozoa class is characterized by parasites that have valves joined by a suture line and polar capsules containing eversible spiral filamento and this class is considered an obligate parasite. The genus Ceratomyxa has approximately 300 species described in fish, both marine and freshwater fish, mainly infecting the gallbladder, but also occurring in the urinary bladder. This study describes a new species of Ceratomyxa in the Amazon region for Pimelodella cristata.
Methods: For these analyses, the fish were desensitized by means of a medullary section with the aid of a sharp metallic instrument. With the fish desensitized, the entire body surface was examined under a binocular stereoscopic microscope. The gallbladder fragments were collected and fixed in Davidson for histological analyses and in ethanol for molecular analyses.
Results: This parasite was found in the host's gallbladder, with elongated spores in a decreasing shape in sutural view, measuring 1.64 ± 0.6 μm in length and 17.13 ± 2.6 μm in width. The polar capsules had a spherical shape of equal size and measured 1.36 ± 0.17 μm in length and 0.9 ± 0.05 μm in width, and each polar capsule contained 4 to 5 turns.
Conclusion: Morphological and phylogenetic analyzes denote that this is a new species of the genus Ceratomyxa.
(© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
Externí odkaz: