Case study 4

Lesson 20

Action

Diagnosis

Findings

Methods for investigation

Differential diagnosis

Saprolegniosis

Furunculosis with secondary saprolegniosis

Parasitology/fresh microscopy*

Bacteriology*

Parasitology/fresh microscopy: heavy growth of Saprolegnia spp. fungal

hyphae.

Bacteriology: no significant fish pathogen isolated.

Saprolegnosis secondary to the process of vaccination.

a) Formalin baths three times a week under veterinary supervision. The level and duration of formalin baths will be dependant on the water quality parameters (regional environmental permits to discharge such treated water may require to be obtained).

b) Careful disinfection and frequent removal and disposal of mortalities.

c) Re-assess vaccination procedures for the future.

7. Answer the following questions:

1. What methods for investigation do you?

2. When did an Atlantic salmon freshwater cage site in Europe experience high mortalities?

3. Were the fish vaccinated manually?

4. How were the fish treated prior to vaccination?

5. What are the clinical signs of Saprolegnosis do you know?

8. Complete these sentences, using the correct variant.

1. Formalin baths must be three times a week	a) under scientists supervision. b) under vinegar solution. c) under veterinary supervision.
2. There is a history of furunculosis	a) in the fish. b) in the bird. c) in the shrimp.
3. The fish were	a) were grown in the pond. b) vaccinated manually. c) were caught in the Atlantic ocean.
4. The fish were treated	a) with antibiotics. b) with medicine. c) with special water.
5. It is necessary to re-assess vaccination procedures	a) for the present. b) for the past. c) for the future.

9. Define the main idea of the text.

a..Methods for investigation

b. Saprolegnosis.

c. Saprolegnosis of atlantic salmon.

10. Pair work. Think of the methods for preventing the disease.

1. a) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

rainbow trout aeration oxygenation sodium chloride osmotic pressure granulomatous

радужная форель проветривание оксигенирование хлорид натрия осмотическое давление гранулематозный

2. Read the words and put down their Russian equivalents:

freshwater tank site ____________________________

pale gills_____________________________________

external lesions ________________________________

internally _____________________________________

3. Change the words according to the model. Translate the words.

Model: Pollution, to pollute – загрязнять

satisfaction, to _______________ - ____________________

combination, to ______________ - _____________________

oxygenation, to ______________ - _____________________

inflammation, to _____________ - ______________________

aeration, to _________________ - ______________________

4. Master the following words.

lethargic - 1) летаргический 2) апатичный, безразличный, вялый

nodule - 1) узелок 2) узелковое утолщение

challenge – введение в организм вещества, провоцирующего выделение (обычно большого количества) антител

inflammation – воспаление

proliferative - пролиферативный

kidney - почка

5. Put down the English for:

многочисленные клетки

грибковое инфекционное заболевание

солевая ванна

доступный

селезенка

сокращение

6. Translate the following words and word combinations in writing.

mid-summer _______________________________

swollen kidneys ____________________________

a swollen abdomen __________________________

with grey to pale pink nodules _________________

low level mortalities _________________________

7. Read and translate the text.

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