Microsporidia Ameson earli sp. n. and A. michaelis (Sprague 1965) infecting blue crabs Callinectes sapidus from shedding facilities in Louisiana.

Autor: Sokolova YY; Insitute of Cytology RAS, St. Petersburg, Russia; Louisiana State University Agricultural Center, Baton Rouge, LA, USA. Electronic address: julia.sokolova@nih.gov., Rogers HA; Louisiana State University Agricultural Center, Baton Rouge, LA, USA., Lively JA; Louisiana State University Agricultural Center, Baton Rouge, LA, USA.
Jazyk: angličtina
Zdroj: Journal of invertebrate pathology [J Invertebr Pathol] 2023 Feb; Vol. 196, pp. 107866. Date of Electronic Publication: 2022 Nov 24.
DOI: 10.1016/j.jip.2022.107866
Abstrakt: During a survey for pathogens and commensals of blue crabs in commercial soft shell shedding facilities in Louisiana, we discovered an occurrence of microsporidiosis in two of forty examined crabs. Judging from spore shape and size, tissue tropism and external signs of muscle pathology, the causative agent of infections was identified as Ameson michaelis, a muscle-infecting species that has been repeatedly detected in populations of Callinectes sapidus in Louisiana since 1965. However, retrospective ultrastructural examination revealed that in one of Ameson-infected crabs, infection was caused by a parasite with ultrastructural characters not completely compliant with the ones of A. michaelis. The major difference was the absence of microtubule-like appendages attached to the exospore, typical of A. michaelis and other Ameson spp. SSUrDNA-inferred pairwise evolutionary distances between the novel species and other Ameson spp. ranged from 0.006 to 0.051; it was 0.039 in the case of A. michaelis. Hence, we describe here a new species in the genus Ameson, and name it after Prof. Earl Weidner, our colleague and friend, an outstanding microsporidiologist and the author of pioneer papers on the ultrastructure and physiology of A. michaelis.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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