Aphanomyces astaci in Mexico: A new haplotype from dwarf crayfish Cambarellus montezumae.

Autor: Martín-Torrijos L; Department of Mycology, Real Jardín Botánico-CSIC, Plaza Murillo 2, 28014 Madrid, Spain. Electronic address: lmtorrijos@rjb.csic.es., Hernández-Pérez A; Departamento de Medicina Preventiva y Salud Pública. Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, 04510, Ciudad Universitaria, México., Monroy-López JF; Departamento de Medicina y Zootecnia de Abejas, Conejos y Organismos Acuáticos. Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, 04510, Ciudad Universitaria, México., Diéguez-Uribeondo J; Department of Mycology, Real Jardín Botánico-CSIC, Plaza Murillo 2, 28014 Madrid, Spain. Electronic address: dieguez@rjb.csic.es.
Jazyk: angličtina
Zdroj: Journal of invertebrate pathology [J Invertebr Pathol] 2023 Nov; Vol. 201, pp. 108000. Date of Electronic Publication: 2023 Oct 06.
DOI: 10.1016/j.jip.2023.108000
Abstrakt: The crayfish plague is an emerging infectious disease caused by the pathogen Aphanomyces astaci (Oomycota), which is responsible for the decimation of Eurasian freshwater crayfish. This pathogen can coexist with the North American crayfish. These are chronic carriers of the disease as consequence of an immune response that can contain the growth of the pathogen without killing it. The origin of A. astaci locates in the southeastern United States and coincides with the origin of the family Cambaridae. This diverse family of decapods is distributed in North America from southern Canada to Honduras. However, only the native crayfish species from Canada and the USA have been examined for the presence of A. astaci. In this study, we describe for the first time the presence of A. astaci in Mexico in a population of the native species Cambarellus montezumae. By analyzing the small (rrnS) and large (rrnL) mitochondrial ribosomal regions, we showed the presence of two haplotypes of A. astaci within the same population (d1-haplotype and, a novel haplotype that was named, mex1-haplotype). The finding of A. astaci in Mexico confirms the occurrence of this pathogen within the range of the family Cambaridae. The individuals of C. montezumae appear to be chronic carriers of A. astaci, indicated by the lack of documented crayfish plague outbreaks in this population, similar to the pattern observed in other North American species. Thus, the results are of special concern to susceptible species of southern regions of America, i.e., Parastacidae. Therefore, this work emphasizes the need to better understand the distribution and genetic diversity of A. astaci within the distribution range of the natural carriers, i.e., North American species, especially the unexplored area of the family Cambaridae.
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 © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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