Fish diseases and management exam

Course no. 406

(A) Match (√) or (x) and correct the wrong answer (One mark each)

1 .Streptococcal septicemia of marine fishes is caused by saprophytic bacilli.

2 .Pasteurella septicemia of grouper fish is caused by gram positive cocci.

3 .suitable cultured fish in rice is silver carp.

4 .Earthen ponds are good example for fish culture utilizing nature food.

5 .Orechromis spilurus fish is commonly culture in freshwater.

6 .Water molds are prevalent diseases in marine fishes.

7 .sand paper disease is caused by parasitic infestation.

8 .BKD disease affects mainly Tilapia fish.

9 .The main sources of Hexamitiosis are infected fishes and amphibians.

10 .The main clinical sign of Lymphocytes disease virus is erratic swimming.

11.Branchiomycosis is a major problem in winter in cultured fishes.

12 .Death of fishes due to saprolegniosis is due to osmoregulatory failure.

13 .Chocolate blood disease is caused by Ammonia poisoning.

14 .The larval nematodes are widely spread among tropical fishes with sever economical losses.

15 .Reservoir of infection in Enteric red mouth disease is infected fish and asymptomatic carrier.

B) Write short notes on :

1 .Biological oxygendenand BOD.

2 .Water intoxication.

3 .Clinical signs of SVC of carp.

4 .Laboratory diagnosis of fish Mycobacteriosis.

5 .Epizootiology and pathogenesis of Saprolegniasis.

C) Tabulate the main differences between the following:

1 .Mouth fungus disease and peduncle disease.

2 .Fin rot disease and Gill rot disease.

3 .Ergasillosis and Argulosis.

4 .Clinostomiosis and Sanguinicolinosis.

5 .Gill flakes and skin flukes .

Cairo University

Faculty of Veterinary Medicine

Department of Fish Diseases and Management

Final examination of fish disease and management

(Subject 406)

May, 2008 Time allowed: 2 Hours

Please answer the following questions

І. Give short notes on………………………….10Marks.

1 .Different toxins produced by A.hydrophila and their actions on infected fish.

. 2 .Laboratory diagnosis of Hexamitiosis

ІІ.Please completes each sentence with the correct answer……20Marks.

1 .Tilapia zilli is not promising cultured fish as it is…………

a. Low growing fish b. Unmarketable fish. C. Low cold tolerance

2 .Mycobacteriosis is a disease of aged fishes characterized by……………

a. Chronic, calcified granulomas b. Chronic, non calcified granulomas

c. Chronic septicaemia

3 .Emphysematus, malodorous swellings in Edwardsiellosis in Catfish is due to………

a. Septicaemia b. Production of H2S gas c. Avirulent bacteria

4 .Typical lesions of SVC are mainly due to……………

a. Hemolytic toxins of the virus b. Damage of endothelial cells by the virus

c. Destruction of fish bones by the virus

5 .Mugil cephalus used in fish culture is……

a. Mouth brooder fish b. Substrate brooder fish c. Sterile fish

6 .The treatment of advanced cases of White spot disease is difficult due to……

a. Systemic infection b. High resistance of the parasite c. Tissue reaction of the host fish

7 .Metallothionine is a good bioindicator of..……

a. Heavy metal pollution b. Organophosphate pollution c. Organic pollution

8 .Ammonia poisioning is common in summer due to high.……

a. Water temperature b. Water pH value c. Water temperature and pH value

9 .Fish pox is difficult for treatment as a result of.……

a. Nature of lesions b. Septicaemia c. Deformity

10 .Gill Rot disease of………

a. Bad management b. Stress relation c. Nutritional deficiency

ІІІ . Please fill the spaces with underlined suitable words…(20 Marks) .

1.Bioaccumulation of toxic substances in fishes considers uptake from the water, while

The biomagnification considers uptake through the Food chain.

2 .Yellow grub disease is common in Tilapia fish. It is more prevalent in open ponds where the final host birds are present.

3 .The successful treatment of Columnaris is achieved through combination of Topical and systemic therapy.

4 .The stress hormone is a catabolic hormone as it leads to hypoproteinemia and hyperglycemia in stressed fishes.

5 .For production of mono-sex Orechromis niloticus 17 α methyl testosterone is given in the food at a concentration of 45-60 mg/Kg food for the first 3-4 weeks.

With my best wishes

Prof.Dr.Mohamed S.Marzouk

Cairo University

Faculty of Veterinary Medicine

Department of Fish Diseases and Management

Fish Diseases and Management

(Subject, 406)

May, 2007 Time allowed: 2 hours

All questions should be answered

1 .Marbling appearance of gills is a pathognomonic sign in several fish diseases. Enumerate these diseases and mention the causative agent and the line of treatment of each one.

2 .Write briefly on the following:

a. problems facing Nile Tilapia culture and there control.

b. sources and fate of ammonia in fish culture.

3 .Write shortly on:

a. Mycobacteriosis in marine fishes.

b. Morphological criteria of the different Monogenea infesting fishes.

Good luck

Prof.Dr.Mohamed S. Marzouk

Cairo University

Faculty of Veterinary Medicine

Department of Fish Diseases and Management

Final Examination

Fish Diseases and Management

(Subject, 406)

January, 2007 Time allowed: 2 hours

Please answer the following questions

Q1-Write full account on:

A.Environmental chemical stressors.

B.Characterize the most commonly cultured fish species used in fish farms in Egypt.

C.Signs and control of MAS in intensive fish farms.

Q2-Discuss the following in details:

A.Enumerate the pathogens affecting gills of tropical fishes and discuss signs and control of one of them.

B.Fish Mycobacteriosis in fresh and marine water fishes.

Q3- Write briefly on:

a.Chemical water parameters in intensive fish farms.

b.Egg Saprolegniosis in fish hatcheries.

c.Production of male monosex Tilapia.

Best wishes ,

Prof .Dr.M.Moustafa