E-viri
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Fernandez‐Espinel, Carla; Medina‐Morillo, Marco; Irgang, Rute; Sotil, Giovanna; Araya‐León, Henry; Flores‐Dominick, Violeta; Romalde, Jesús L.; Avendaño‐Herrera, Ruben; Yunis‐Aguinaga, Jefferson
Journal of fish diseases, February 2023, 2023-Feb, 2023-02-00, 20230201, Letnik: 46, Številka: 2Journal Article
Yersinia ruckeri causes important economic losses for rainbow trout (Oncorhynchus mykiss) farms worldwide. This bacterial disease is likely the most common among trout in Peru; however, no commercial vaccine is available nationally, which is, in part, due to a lack of information on the bacterium. The aim of the current study was to characterize 29 Y. ruckeri isolates sampled from seven cage‐reared farms in the Puno Region, the focal point for aquaculture activities in Peru. For this, samples were taken from fish with clinical signs (i.e. haemorrhages, uni‐ or bilateral exophthalmia, hyphaemia and/or melanosis). Notable among our findings was the existence of both Y. ruckeri biotype 1 (9 isolates) and biotype 2 (20 isolates; negative for sorbitol and Tween 80). The isolates further differed in API profiles 5307100 (21 isolates), 1307100 (4 isolates), 1305100 (2 isolates), 1307120 (1 isolate) and 5305100 (1 isolate), with the main differences being in the tests for lysine decarboxylase, gelatine hydrolysis and D‐saccharose fermentation. Despite these differences, all isolates shared identical ERIC‐PCR and REP‐PCR profiles and belonged to the O1a serotype. Fingerprints were identical to the reference strain CECT 955 (serotype O1a). The information obtained will be used for epidemiological purposes by health authorities and for the development of a vaccine against Y. ruckeri, a prominent request made by fish farmers in Peru.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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