Fish diseases

Question 1

Etiological agent of velvet disease

Answer 1

Piscinoodium pillulare

Question 2

Lifecycle of piscinoodium pillulare

Answer 2

Dinospores infect fish, then turn into trophonts. Trophonts leave fish and become tomonts

Question 3

Etiological agent of Ich

Answer 3

Ichthyophthirius multifiliis

Question 4

C/S of ich

Answer 4

Excess mucus, labored breathing, leth. White raised nodules on skin

Question 5

Ich histological hallmark

Answer 5

Horseshoe-shaped macronucleus

Question 6

What’s the only significant virus in fish?

Answer 6

Lymphocystis (Iridovirus)

Question 7

Pathognomonic lesion for Lymphocystis

Answer 7

Hypertrophic fibroblasts

Question 8

C/S of lymphocystis

Answer 8

Raised, white, waxy lesions

Question 9

Etiological agent of neural microsporidiosis

Answer 9

Pseudoloma neurophilia

Question 10

c/s of pseudoloma

Answer 10

emaciation, spinal curvature

Question 11

Tx for microsporidiosis

Answer 11

Fumagillin

Question 12

Etiological agent of capillariasis

Answer 12

Pseudocapillaria tomentosa

Question 13

c/s of capillariasis

Answer 13

dark, emaciated, lethargic. Cellulitis of affected region

Question 14

ID of P. tomentosa

Answer 14

Oval, bioperculate eggs

Question 15

tx of P. tomentosa

Answer 15

Ivermectin? Levamisole, fenbendazole

Question 16

Etiological agent of hole in the head disease

Answer 16

Edwardsiella ictaluri

Question 17

C/S of gliding bacteria (Flavibacterium, Flexibacter) spp

Answer 17

Fin and tail rot, surface infections, bacterial gill disease

Question 18

Etiologicla agent of Costiasis

Answer 18

Ichthyobodo necatrix

Question 19

Four protozoal agents that affect fish

Answer 19

Piscinoodium pillulare
Ichthyophthirius multifilis
Ichthyobodo necatrix
Trichodina
Pseudoloma neurophilia

Question 20

2 species of trematodes

Answer 20

Gyrodactylus

Dactylogyrus

Question 21

Cause of nephrocalcinosis

Answer 21

High CO2 or excess Ca or Mg in diet

Question 22

Most common spontaneous neoplasm

Answer 22

Seminoma

Question 23

Which organism can be a promoter of GI adenocarcinoma?

Answer 23

Pseudocapillaria tomentosa

Question 24

How to differentiate goiter from thyroid tumor?

Answer 24

Histo

Question 25

When does goiter occur?

Answer 25

When diets in environment are low in iodine or when goitrogenic chemicals are present

Question 26

Where do spindle cell sarcomas form?

Answer 26

Viscera, skeletal muscle behind the eye (causing exophthalmia)

Question 27

2 species of trematodes

Answer 27

Gyrodactylus | Dactylogyrus

Question 28

Cause of nephrocalcinosis

Answer 28

High CO2 or excess Ca or Mg in diet

Question 29

Most common spontaneous neoplasm

Answer 29

Seminoma

Question 30

Which organism can be a promoter of GI adenocarcinoma?

Answer 30

Pseudocapillaria tomentosa

Question 31

How to differentiate goiter from thyroid tumor?

Answer 31

Histo

Question 32

When does goiter occur?

Answer 32

When diets in environment are low in iodine or when goitrogenic chemicals are present

Question 33

Where do spindle cell sarcomas form?

Answer 33

Viscera, skeletal muscle behind the eye (causing exophthalmia)