Clinical signs

History

CASE STUDY 3

Lesson 19

Action

Diagnosis

Carp erythrodermatitis as caused by atypical A. salmonicida.

a) Oral antibiotic therapy based on the antibiogram (antibiotic sensitivity) under veterinary supervision.

b) Improving the environmental conditions will also assist in reducing the impact of the disease.

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

d) Avoid moving any stock from site.

e) Consider vaccination for future generations.

9. Answer the following questions:

1. What are the clinical signs of Carp erythrodermatitis?

2. When are the majority of the mortalities and moribund exhibiting skin lesions and ulcers?

3. Where do bacterial colonies present?

4. Who has started to experience low level mortalities in the early summer?

5. What are the main steps to cue the disease?

10. Pair work. Think of the farm problems scientists have.

1. Read the words:

furunculosis

florfenicol

plaques

Saprolegniosis

antibiotics

presmolts

2. Master the active vocabulary:

Atlantic salmon - атлантический лосось, сёмга

reassess - производить переоценку

furunculosis - фурункулёз

fungal - грибковый

saprolegnia - водный грибок

hyphae - гифы

3. Pronounce correctly:

[Ɵ] – throughout, pathogen, think

[ð] - with, than, the, other

[f] – fungal, significant, formalin, fresh

[v] – variety, ever, vaccinate, veterinary

4. Put down the adverbs. Translate the words. Continue the list.

Model: rapid – rapidly, быстрый - быстро

simple - __________, __________ - _____________

typical - __________, __________ - _____________

manual - __________, _________ - ______________

quick - ___________, _________ - _______________

5. Which of the following words are nouns? verbs? adjectives? adverbs? Why?

Fish, feed, well, vaccinate, manually, salmon, freshwater, cage, site, mortality, fungal, baths, dependant, plaques, fins, tails, time, week, veterinary, supervision, level, duration, formalin, be, water, quality.

6. Read and translate the text:

An Atlantic salmon freshwater cage site in Europe is experiencing high mortalities three weeks following vaccination. There is a history of furunculosis and atypical furunculosis in the fish and the fish were treated with antibiotics (florfenicol) prior to vaccination. Water temperature is 9°C and the fish were vaccinated manually.

Moderate level mortalities

Moribund and mortalities with fungal plaques on the fins and tails

(Figure 3)

Fish feeding well and otherwise in good condition.

Figure 3. Atlantic salmon presmolts with extensive fungal plaques on fins and

tails.

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