Yersinia ruckeri —A threat not only to rainbow trout

Abstract

Yersinia ruckeri (Y. ruckeri) can cause mortalities that are contributing to substantial economic losses in the rainbow trout (Oncorhynchus mykiss) aquaculture sector. Because of its most characteristic clinical signs, the disease in rainbow trout caused by this pathogen is called enteric redmouth disease. Although it is considered to affect mainly salmonids, there are reports in the available literature of isolating this bacterium from other fish species, both clinically healthy and diseased. The aim of this study was to analyse the available data concerning yersiniosis in non‐salmonid fish. The analysed data indicate that Y. ruckeri is a threat not only to rainbow trout. Some of the affected species have high commercial importance and mortalities may contribute to high economic losses. The disease symptoms may not be specific and can be different from those characteristic for enteric redmouth in trout, which may lead to misdiagnosis. Collected information indicates that infection with Y. ruckeri should be taken into account in the diagnostic procedures not only in salmonids.

Enfermedades bacterianas y sus agentes etiológicos identificados en peces de México - Una Revisión

“…La yersiniosis, también conocida como enfermedad enterica de la boca roja (ERM) es una de las enfermedades de mayor impacto económico en cultivos de salmónidos de agua dulce; también afecta a otras especies de peces. Es causada por Yersinia ruckeri, bacteria Gram-negativa miembro de la familia Enterobacteriaceae, no esporulada, sin capsula y de motilidad variable, aislada por primera ocasión de trucha arcoíris en los años 1950s, y actualmente causa enfermedad en prácticamente todos los lugares donde se cultivan salmónidos (28,29). En américa latina ERM se ha registrado afectando a salmón del atlántico (Salmo salar), salmón coho y trucha arcoíris en Chile (30), y trucha arcoíris en Perú (29).…”

Tissue‐specific differences in detection of Yersinia ruckeri carrier status in rainbow trout (Oncorhynchus mykiss)

“…The infection is most acute and lethal in fish up to fingerling size, whereas older fish typically suffer from a chronic infection (Tobback et al, 2007). This disease is historically most prevalent in farmed rainbow trout but has a broad host range including at least 20 species of fish (Pajdak-Czaus et al, 2019). Outbreaks of ERM continue to occur around the world and are commonly linked to poor water quality and husbandry practices (Tinsley et al, 2011).…”

Influence of Infectious Pancreatic Necrosis Virus and Yersinia ruckeri Co-Infection on a Non-Specific Immune System in Rainbow Trout (Oncorhynchus mykiss)

“…The name of the disease comes from a characteristic symptom in the form of petechiae around the mouth [6]. Rainbow trout are considered the most susceptible to the disease, however Y. ruckeri was also isolated from other fish species, both from clinically healthy fish as well as from infected individuals [7]. The development of an asymptomatic carrier state after disease outbreaks may affect up to 25% of clinically healthy trout.…”