Enteric redmouth disease: outbreak in rainbow trout in Switzerland

Meier, W

doi:10.3354/dao002081

Cited by 13 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 18 and 22°C, three fish also developed the unusual eye lesions typical of affected fish from the farm ponds. These signs are consistent with those reported in trout and other fish species infected naturally and experimentally with Y. ruckeri (Bullock, Stuckey & Herman 1976;Roberts 1983;Meier 1986). Fish exposed to 7.8´10 6 bacteria fish ±1 at 13°C did not develop the unusual eye and head lesions, and had pale skin colouration.…”

Section: Catfish Challenge Experimentssupporting

confidence: 91%

Epizootics in farm‐raised channel catfish, Ictalurus punctatus (Rafinesque), caused by the enteric redmouth bacterium Yersinia ruckeri

Danley

Goodwin

Killian

1999

Journal of Fish Diseases

View full text Add to dashboard Cite

In the winters of 1995 and 1996, unusual disease outbreaks occurred on two separate channel catfish farms in Arkansas, USA. Affected fish exhibited extraordinary haemorrhaged rings around the eyes and raised haemorrhaged areas overlying the frontal foramens. Other signs included abnormal swimming, lethargy, loss of equilibrium, and exophthalmia. Bacterial isolates from the moribund fish were identified as Yersinia ruckeri by biochemical tests, no lysis by the Hafnia‐specific bacteriophage 1672, and Y. ruckeri‐specific growth patterns on Shotts‐Waltman media. Fingerling catfish injected intraperitoneally with the bacterial isolate at 7.8 × 106 bacteria fish−1 developed lesions characteristic of the epizootics at 13, 18, and 22 °C and a biochemically identical isolate was recovered. Fingerling rainbow trout injected with the channel catfish isolate at 1 × 105 bacteria fish−1 and held at 20 °C developed signs typical of enteric redmouth by 4 days post‐inoculation and were moribund by 5 days post‐inoculation. Some differences of clinical signs occurred between experimentally infected rainbow trout and channel catfish. Clinical and biochemical similarities between infections of Y. ruckeri and many warmwater pathogens in affected catfish may lead to incorrect diagnosis of ERM infections.

show abstract

Section: Catfish Challenge Experimentssupporting

confidence: 91%

Epizootics in farm‐raised channel catfish, Ictalurus punctatus (Rafinesque), caused by the enteric redmouth bacterium Yersinia ruckeri

Danley

Goodwin

Killian

1999

Journal of Fish Diseases

View full text Add to dashboard Cite

show abstract

“…Although yersiniosis of rainbow trout has been reported from most European countries (Meier, 1986;Csefay et al, 1989;Toranzo et al, 1990;Rodriguez et al, 1999), the present work is the first report of the disease caused by Yersinia ruckeri in the Croatian rainbow trout farms.…”

Section: Discussionmentioning

confidence: 77%

Occurrence of enteric redmouth disease in rainbow trout (Oncorhynchus mykiss) on farms in Croatia

Oraić

Zrnčić

Šoštarić

2002

Acta Veterinaria Hungarica

View full text Add to dashboard Cite

During the spring of 1996 and autumn of 1997 unusual mortality outbreaks among rainbow trout fry and yearlings occurred at two different trout farms, resulting in mortality of 20 and 10 per cent, respectively. Generally, the affected fish, swimming at the water surface, were reluctant to eat and were dark pigmented with visible haemorrhages around and within the oral cavity. Bacterial isolates from moribund fish from both cases were identified as Yersinia ruckeri by standard biochemical tests and API 20E. The isolated strains were found to be sensitive to tetracycline, chloramphenicol, co-trimoxazole, nalidixic acid, flumequine, enrofloxacin, carbenicillin and gentamicin. Microplate agglutination assay confirmed that both isolates belonged to serotype O1. The pathogenicity of the isolated bacteria was confirmed by challenge experiment. Titres of specific antibodies were determined in the sera of survivors. The titre was highest on the 21st day postchallenge and was detectable until the 81st day.

show abstract

“…In previous studies, mainly motile strains of Y. ruckeri were initially found associated with clinical infections of ERM in rainbow trout (Meier 1986). In the current study, isolates from most trout farms were non-motile, which might indicate that under the pressure of vaccination with vaccines directed against motile and non-motile Y. ruckeri, non-motile strains were distributed over several farms in NRW.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Yersinia ruckeri strains isolated from trout farms in northwest Germany

Huang¹,

Jung²,

Schäfer³

et al. 2015

Dis. Aquat. Org.

View full text Add to dashboard Cite

Enteric redmouth disease (ERM), caused by Yersinia ruckeri, is among the most important infectious diseases in rainbow trout Oncorhynchus mykiss aquaculture in Europe. Our aim was to analyse the persistence of Y. ruckeri strains in trout farms in northwest Germany and their dissemination between farms based on a detailed molecular and phenotypical characterisation scheme. The data on identification and characterisation of Y. ruckeri strains and examining the distribution of these strains in the field could serve as a basis for preventive disease monitoring plans. During the observation period from June 2011 until June 2012, we collected 48 Y. ruckeri isolates from 12 different rainbow trout hatcheries. In total, 44 (91.7%) of the isolates were nonmotile; in particular, all isolates recovered during the sampling period in winter and early spring were non-motile. In several trout farms, characteristic farm-specific Y. ruckeri isolates from particular typing groups were isolated throughout the year, while in other farms, which had a trading relationship between each other, ERM outbreaks were caused by Y. ruckeri from the same typing group. Our data indicate that in some farms, the causative Y. ruckeri strains persisted in the respective trout farm. The presence of Y. ruckeri from the same typing group in farms with a trading relationship indicates a dissemination of the infection between the farms. KEY WORDS: Epidemiology · Enteric redmouth disease · Rainbow trout · Oncorhynchus mykissResale or republication not permitted without written consent of the publisher FREE REE ACCESS CCESS

show abstract

Enteric redmouth disease: outbreak in rainbow trout in Switzerland

Abstract: Yersinia ruckeri, Serovar

Cited by 13 publications

References 9 publications

Epizootics in farm‐raised channel catfish, Ictalurus punctatus (Rafinesque), caused by the enteric redmouth bacterium Yersinia ruckeri

Epizootics in farm‐raised channel catfish, Ictalurus punctatus (Rafinesque), caused by the enteric redmouth bacterium Yersinia ruckeri

Occurrence of enteric redmouth disease in rainbow trout (Oncorhynchus mykiss) on farms in Croatia

Analysis of Yersinia ruckeri strains isolated from trout farms in northwest Germany

Contact Info

Product

Resources

About