Enteric Red Mouth
Yersinia ruckerii
ERM
Fish ERM
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ERM is characteristically a disease of rising and falling water temperatures. The highest risk of disease occurs between 8°C and 16°C although mortality can occur at temperatures as low as 4°C. At the higher temperatures mortality can rise quickly. Levels of 15 - 20 % have been reported even with antibiotic treatments. Fish of all sizes are affected, however, fish of 50 - 200g are the most susceptible. Stressful conditions such, as high stocking densities and poor water quality will increase the level of susceptibility and mortality. |
loss of appetite
Sluggish movement (Lethargic)
Red mouth and hemorrhages on the belly
Hemorrhages of the mouth and gills
General septicemia with inflammation of the gut
The spleen is often enlarged and can be almost black in color
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Severe congestion and hemorrhage in the head tissues with erosion of the lower jaw being common. The spleen, kidney, and intestine can also be infected. |
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