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Fall 22: micro > Test 2: fish > Flashcards

Test 2: fish Flashcards

1
Q

stress cause fish to produce

A

catecholamines and cortisol

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2
Q

aeromonas salmonicida cause

A

lesions in the spleen
skin ulcer/ furunculosis

bacteria

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3
Q

A. salmonicidia virulence factors

A

A layer protein
extracellular products such as toxins and proteases

bacteria

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4
Q

treatment for A. salmonicida

A

oxytetracycline and vaccine

meds can lead to resistance
vaccines do not cover all strains

bacteria

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5
Q

enteric red mouth disease is caused by

A

Yersinia Ruckeri
gram - bacteria

salmonoid

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6
Q

Yersinina Ruckeri infect

A

small fish
mostly salmonid species

enteric red mouth disease

gram - bacteria

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7
Q

Yersinia ruckeri cause

A

heamorrhagic staining in mouth and visera - enteric red mouth disease

gram negative bacteria

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8
Q

virulence factor for yersinia ruckeri

A

plasmid

gram - bacteria
enteric red mouth disease

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9
Q

columnaris diesease is caused by

A

flavobacterium columnaris
gram - bacteria
lesions surrounded by hyperaemic zones

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10
Q

Flavobacterium columnaris cause

A

Columnaris disease
gram - bacteria
lesions on dorsal surface surrounded by hyperaemic zone
patchy white skin

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11
Q

enteric septicemia of catfish is caused by

A

edwarsiella ictaluri
gram - bacteria

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12
Q

edwarsiella ictaluri infect

A

catfish
cause enteric septicemia of catfish

gram - bacteria

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13
Q

acute form of Edwarsiella ictaluri cause necrosis in the —

A

spleen and liver

enteric septicemia of catfish

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14
Q

chronic form of Edwarsiella ictaluri cause

A

typical nasal ulcer

enteric septicemia of catfish
gram - bacteria

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15
Q

treatment for edwarsiella ictaluri

A

Vaccine available (bath vaccine), but works very poorly.
Bacteria susceptible to CCP.

enteric septicemia of catfish
gram - bacteria

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16
Q

treatment for Flavobacterium columnaris

A

Treatment of the disease with antibiotics. No vaccine available

Bacteria is susceptible to CCP but not to the ACP

Columnaris disease
gram - bacteria

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17
Q

Renibacterium Salmonimarum cause —

A

bacterial kidney disease (BKD)
pin-pount hemorrage
granulomas throughout spleen and kidney

gram + bacteria

18
Q

host species for Renibacterium Salmonimarum

A

Salmonid species are the primary hosts, although the disease has been induced in non-salmonid species.

bacterial kidney disease
gram + bacteria

19
Q

—- is very harmful. Induces haemolytic, proteolytic, exotoxin, catalase and DNAse activities.

A

Renibacterium Salmonimarum

gram + bacteria

bacterial kidney disease (BKD)

20
Q

virulent factor for renibacterium salmonimarum

A

p57- promotes intracellular invasion of leucocytes and inducing immunosuppression.

bacterial kidney disease (BKD)
gram + bacteria

21
Q

treatment for Renibacterium Salmonimarum

A

no vaccine

bacterial kidney disease (BKD)
gram + bacteria

22
Q

Vibrio anguilarm and vibrio salmonicida cause

A

vibriosis
lesions and external hemorrhage

gram - bacteria

23
Q

— secrete very virulent (lethal) ECPs, that agglutinates fish RBC.

A

V. anguillarum

Vibriosis
gram -

24
Q

treatment for Vibrio anguilarum

A

vaccine

25
Q

Piscirickettsia salmonis cause

A

Piscirickettsiosis
white/yellow systemic ulcers, kidney necrosis, anemia

gram - nonmotile bacterium, non-encapsulated

26
Q

how to get Piscirickettsia salmonis

A

Enters through gills and skin and or infected preys
-Horizontal and vertical transmission

salmon disease
gram - bacteria

27
Q

Piscirickettsia salmonis uses — as vectors.
Will infect — and spread and evade host

A

isopod
macrophages

gram - bacteria

28
Q

why does kidney injury cause anemia in fish

A

no bone marrow
blood products made in the kidney

29
Q

Infectious haematopoietic necrosis virus cause

A

thick trailing fecal cast
hemorrage necrosis

30
Q

what animals are infected by IHNV

A

Infectious haematopoietic necrosis virus
salmon fry
little fish

31
Q

treatement for IHNV

A

No commercial vaccines available. Immunization of fish with IHNV induces neutralizing antibodies.

32
Q

the “ebola” of fish viruses

A

Infectious haematopoietic necrosis virus
IHNV

33
Q

Viral Haemorrhagic Septicaemia Virus (VHSV) cause

A

giant eyes
hemorrage in swim bladder and fatty tissue
septicemia
kidney necrosis- anemia

34
Q

— causes marked kidney necrosis. Loss of haemopoietic cells. Deadly especially in infected fry.

A

VHSV

35
Q

treatment for VHSV

A

-No commercial vaccines available. Immunization of fish with VHSV induces neutralizing antibodies

Viral Haemorrhagic Septicaemia Virus

36
Q

Koi herpesvirus causes

A

-lethargy,
-erratic swimming behaviour
-increased mucus production
-haemorrhaging within the liver
-gill necrosis

37
Q

oomycetes

A

water molds
fungal disease

38
Q

— usually infects fish that are already diseased (secondary infections) and/or fish that are immunosuppressed.

A

-Fungi

39
Q

Many fungi, especially the —- induce lymphocytopenia, and impairment of the haematopoietic organs

A

oomycetes

fungus

40
Q

treatment for oomycetes

A

malachite green, 0.5% NaCl.

fungi

Fall 22: micro (25 decks)

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