Test 2: fish Flashcards
stress cause fish to produce
catecholamines and cortisol
aeromonas salmonicida cause
lesions in the spleen
skin ulcer/ furunculosis
bacteria
A. salmonicidia virulence factors
A layer protein
extracellular products such as toxins and proteases
bacteria
treatment for A. salmonicida
oxytetracycline and vaccine
meds can lead to resistance
vaccines do not cover all strains
bacteria
enteric red mouth disease is caused by
Yersinia Ruckeri
gram - bacteria
salmonoid
Yersinina Ruckeri infect
small fish
mostly salmonid species
enteric red mouth disease
gram - bacteria
Yersinia ruckeri cause
heamorrhagic staining in mouth and visera - enteric red mouth disease
gram negative bacteria
virulence factor for yersinia ruckeri
plasmid
gram - bacteria
enteric red mouth disease
columnaris diesease is caused by
flavobacterium columnaris
gram - bacteria
lesions surrounded by hyperaemic zones
Flavobacterium columnaris cause
Columnaris disease
gram - bacteria
lesions on dorsal surface surrounded by hyperaemic zone
patchy white skin
enteric septicemia of catfish is caused by
edwarsiella ictaluri
gram - bacteria
edwarsiella ictaluri infect
catfish
cause enteric septicemia of catfish
gram - bacteria
acute form of Edwarsiella ictaluri cause necrosis in the —
spleen and liver
enteric septicemia of catfish
chronic form of Edwarsiella ictaluri cause
typical nasal ulcer
enteric septicemia of catfish
gram - bacteria
treatment for edwarsiella ictaluri
Vaccine available (bath vaccine), but works very poorly.
Bacteria susceptible to CCP.
enteric septicemia of catfish
gram - bacteria
treatment for Flavobacterium columnaris
Treatment of the disease with antibiotics. No vaccine available
Bacteria is susceptible to CCP but not to the ACP
Columnaris disease
gram - bacteria
Renibacterium Salmonimarum cause —
bacterial kidney disease (BKD)
pin-pount hemorrage
granulomas throughout spleen and kidney
gram + bacteria
host species for Renibacterium Salmonimarum
Salmonid species are the primary hosts, although the disease has been induced in non-salmonid species.
bacterial kidney disease
gram + bacteria
—- is very harmful. Induces haemolytic, proteolytic, exotoxin, catalase and DNAse activities.
Renibacterium Salmonimarum
gram + bacteria
bacterial kidney disease (BKD)
virulent factor for renibacterium salmonimarum
p57- promotes intracellular invasion of leucocytes and inducing immunosuppression.
bacterial kidney disease (BKD)
gram + bacteria
treatment for Renibacterium Salmonimarum
no vaccine
bacterial kidney disease (BKD)
gram + bacteria
Vibrio anguilarm and vibrio salmonicida cause
vibriosis
lesions and external hemorrhage
gram - bacteria
— secrete very virulent (lethal) ECPs, that agglutinates fish RBC.
V. anguillarum
Vibriosis
gram -
treatment for Vibrio anguilarum
vaccine
Piscirickettsia salmonis cause
Piscirickettsiosis
white/yellow systemic ulcers, kidney necrosis, anemia
gram - nonmotile bacterium, non-encapsulated
how to get Piscirickettsia salmonis
Enters through gills and skin and or infected preys
-Horizontal and vertical transmission
salmon disease
gram - bacteria
Piscirickettsia salmonis uses — as vectors.
Will infect — and spread and evade host
isopod
macrophages
gram - bacteria
why does kidney injury cause anemia in fish
no bone marrow
blood products made in the kidney
Infectious haematopoietic necrosis virus cause
thick trailing fecal cast
hemorrage necrosis
what animals are infected by IHNV
Infectious haematopoietic necrosis virus
salmon fry
little fish
treatement for IHNV
No commercial vaccines available. Immunization of fish with IHNV induces neutralizing antibodies.
the “ebola” of fish viruses
Infectious haematopoietic necrosis virus
IHNV
Viral Haemorrhagic Septicaemia Virus (VHSV) cause
giant eyes
hemorrage in swim bladder and fatty tissue
septicemia
kidney necrosis- anemia
— causes marked kidney necrosis. Loss of haemopoietic cells. Deadly especially in infected fry.
VHSV
treatment for VHSV
-No commercial vaccines available. Immunization of fish with VHSV induces neutralizing antibodies
Viral Haemorrhagic Septicaemia Virus
Koi herpesvirus causes
-lethargy,
-erratic swimming behaviour
-increased mucus production
-haemorrhaging within the liver
-gill necrosis
oomycetes
water molds
fungal disease
— usually infects fish that are already diseased (secondary infections) and/or fish that are immunosuppressed.
-Fungi
Many fungi, especially the —- induce lymphocytopenia, and impairment of the haematopoietic organs
oomycetes
fungus
treatment for oomycetes
malachite green, 0.5% NaCl.
fungi
