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Observations of crayfish plague infections in commercially important narrow-clawed crayfish populations in Turkey
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Observations of crayfish plague infections in commercially important narrow-clawed crayfish populations in Turkey
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Journal Article
Observations of crayfish plague infections in commercially important narrow-clawed crayfish populations in Turkey
2018
Overview
We studied the presence of possible Aphanomyces astaci infections in eight Turkish narrow-clawed crayfish ( Astacus leptodactylus ) populations by analyzing the prevalence and genotypes of the disease agent A. astaci . The qPCR analyses revealed A. astaci infection in seven of the studied eight populations, with the agent level A2 or higher. The agent levels among the infected populations varied from A0 to A5, i.e., from negative to high level of infection, based on qPCR ranking. Based on the sequencing of the chitinase gene and the mitochondrial ribosomal rnnS and rnnL subunits, we detected both A (As) and B (PsI) haplogroups of A. astaci in our samples, with each of the studied populations being carriers of only one haplotype. The results confirm previous detections of A. astaci in Turkish narrow-clawed crayfish populations and reveal, that both A and B haplogroup A. astaci carriers exist widely in A. leptodactylus populations of Turkey. Nous avons étudié la présence possible d' Aphanomyces astaci dans huit populations turques d'écrevisses à pattes grêles ( Astacus leptodactylus ) en analysant la prévalence et les génotypes de l'agent pathogène A. astaci . Les analyses qPCR ont révélé une infection à A. astaci dans sept des huit populations étudiées, avec le niveau d'agent A2 ou plus. Les taux d'agents chez les populations infectées variaient de A0 à A5, c'est-à-dire du niveau négatif au niveau élevé d'infection, selon le classement qPCR. En se basant sur le séquençage du gène de la chitinase et des sous-unités rnnS et rnnL du ribosome mitochondrial, nous avons détecté les haplogroupes A (As) et B (PsI) d' A. astaci dans nos échantillons, chacune des populations étudiées n'étant porteuse que d'un seul haplotype. Les résultats confirment les détections précédentes d' A. astaci dans les populations d'écrevisses à pattes grêles et révèlent que les porteurs des deux haplogroupes d' A. astaci existent largement dans les populations d' A. leptodactylus de Turquie.
Publisher
EDP Sciences
Subject
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