La Crosse Fish Health Center
Midwest Region

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Diseases

Bacteriology

 

Bacteria are one-celled microscopic organisms which live and grow naturally in nearly all environments. In a balanced ecosystem, bacteria and fish can live in harmonious equilibrium. Aquaculture practices, however, often disrupt the normal balance between fish and environmental bacteria. Crowding, improper flow rates, poor water quality, handling and poor diet can all offset the natural balance between fish and the environmental bacteria, thus increasing the fish's susceptibility to pathogenic organisms.

Bacterial diseases that we screen fish for include:

Bacterial Kidney Disease

Enteric Redmouth

Enteric Septicemia

Furunculosis

 

Virology

Viruses are submicroscopic parasites that infect cells and cause damage or destruction to them. All known viruses are infective agents and are often specific to a particular host organism. Many viral infections will not produce symptoms.

Viral diseases that we screen fish for include:

Channel Catfish Virus Disease

Epizootic Epitheliotropic Virus Disease

Infectious Hematopoietic Necrosis

Infectious Pancreatic Necrosis

Large Mouth Bass Virus

Spring Viremia of Carp Virus

Viral Hemorrhagic Septicemia Virus

 

Parasitology

A parasite is an animal which lives in or on another animal (the host). The parasite depends on its host for food and causes injury by inducing tissue and organ damage. This damage increases the fish's susceptibility to secondary bacterial infections. Parasites can also serve as carriers of viral and bacterial diseases.

Parasites that we screen fish for include:

Asian Fish Tape Worm

Bass Tape Worm

Salmincola

Whirling Disease

Ich

Yellow Grub

Black Spot Disease

 

Fungal Diseases

Saprolegnia

Last updated: October 7, 2008