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15r40xb_miniLa nefrocalcinosis es una enfermedad no infecciosa relacionado con la exposición a altos niveles de CO2 durante la fase de cultivo en agua dulce, en el caso de los salmónidos. Otras que se han descrito asociadas a esta condición son la intoxicación por selenio y deficiencia de magnesio.

Histopatológicamente a nivel renal se observa preencia de depósitos basófilos en los túbulos renales y ductos colectores, cambios degenerativos glomerulares y del epitelio tubular. En casos crónicos se observa firbosis del tejido y formación de granulomas. 

 

Publicado el Domingo, 18 Agosto 2013

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Scuticociliatosis in the Chilean Flounder (Paralichthys adspersus)

Scuticociliatosis is a parasite infection caused by ciliated protozoan that belong to the Uronema, Miamiensis and Philasteride genus.

The systematic infections by the histophage parasites is currently one of the main challenges for sea fish farming in the world.

These ciliates have the capacity to invade and systematically destroy the tissues of the infected fish. Once the systematic infection has been installed there is no effective treatment.

Publicado el Domingo, 18 Agosto 2013

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Nephrocalcinosis in Rainbow Trout (Oncorhynchus mykiss) II: Macroscopic pathology, moderate and severe cases

In kidney and other such organs, such as the stomach and the muscle.

The sub-clinical condition of the disease can be diagnosed through histology (kidney, stomach), associated to the monitoring of variables, such as the hematocrit and the creatinine.

The clincal condition can be evaluated according to the severity of the macroscopic findings, having a scale to classify the degree that the kidney has been affected and signs present in other organs.

Publicado el Domingo, 18 Agosto 2013

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Nephracalcinosis in Rainbow Trout (Oncorhynchus mykiss) I: Macroscopic pathology, slight cases

The nephracalcinosis is a kidney pathology that is characterized by salt deposits of calcium and magnesium in the kidney and other tissues. It is associated to degeneration and a chronic inflammatory response.

You cannot see external clinical signs in the sub-clinical presentation of the disease. Many times you can only see renal histopathological lesions or focused deposits at the kidney level. As the disease progresses the external clinical signs are characterized by a swollen belly, exophthalmos and death. Internally the affected fish show a pale liver, ascites, renal paleness and variable calcification in the kidney.

Publicado el Domingo, 18 Agosto 2013

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The Salmonid Rickettsial Septicaemia (SRS) or Piscirickettsiosis, is an infectious disease which is caused by the Piscirickettsia salmonis agent. This is a non-motile, obligate intercellular bacterium, pleumporphic, but predominately coccoid agent. This disease is one of the main causes for mortality loss in Chile (in number of fish, biomass). It is also the main use of antibiotics in the on-growing process affecting the three salmonid species in chile.

Currently the Rainbow Trout (Oncorhynchus mykiss) is the main species that is being farmed in Chile. The reason for this is due to the current sanitary situation affecting the farming of the Atlantic salmon (Salmo salar).

Publicado el Domingo, 18 Agosto 2013

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