Transport of fresh material

Transport of live fish

SAMPLING FOR DISEASE DIAGNOSIS

Lesson 11

1. Read the words:

specimens

investigation

appropriate

approximately

temperature

insulated

specialized

2. Master the active vocabulary:

seal - заделка; запайка; герметизация, заливка || заделывать; запаивать; герметизировать, заливать

polystyrene - полистрол

rough - грубый

virology - вирусология

dispatch - посылать; отсылать, отправлять по назначению

chill - охлаждать, замораживать

on-site - на месте

3. Pronounce correctly:

[q] - equivalent, particularly, frequent

[dз] - oxygen, virology, histology

[g] – investigation, goods, bag, again, guide

[k] – can, cool, container, reproductive

4. Read and translate the text:

The ideal specimens for disease investigation or health monitoring are live fish. Samples can be taken from these either on site or transported live to the appropriate laboratory.

Place the fish, representative of the problem, in a plastic bag filled to approximately a third with water and two thirds oxygen. Seal the bag with cable ties or equivalent and place in another bag and seal again. Then place the bag on ice or cool-packs in an insulated box e.g. polystyrene, place more ice on top and seal the container. The maximum transport time depends on water temperature, and the ratio between biomass, water volume and oxygen. As a rough guide the transport time should not exceed 12 hours and the biomass should not exceed one third of the water volume. Transport time is significantly reduced if oxygen is not used. Live fish weighing more than approximately 300g should not be sent by normal goods transport (air, rail or road), but should either be sampled on site or sent via specialized forms of transport.

Unopened fish, reproductive products, virology samples, fish heads (for Myxobolus) may be dispatched for laboratory investigation in the fresh state. All samples must be chilled to as close to 0°C with out freezing. Pack samples in ice and in an insulated container and dispatch. The maximum transport time is 24 hours.

5. Complete these sentences, using the correct variant.

1.Good variants for investigation are	a) big fish. b) live fish. c) beautiful fish.
2. The maximum transport time is	a)6 hours. b)48 hours c)24 hours
3. An insulated box is	a) a polystyrene container. b) a simple diet. c) a polystyrene room.
4. The maximum transport time depends on	a) water temperature. b) the ratio between biomass, water volume and oxygen. c) water temperature, and the ratio between temperatures, water volume and oxygen.
5. Live fish weighing more than approximately 300g	a) should not be sent by normal goods transport. b) should be sent by air. c)should be sent by normal goods transport.

6. Answer the following questions:

1. When is transport time reduced significantly?

2. What are the ideal specimens for disease investigation and health monitoring?

3. You should place the fish in a plastic bag filled to approximately a third with water or two thirds with water?

4. What may be dispatched for laboratory investigation in the fresh state?

5. Samples are packed in ice, aren't they?

7. Define the main idea of the text.

1. Transport of fresh material.

2. Transport of live fish.

3. Transport of fish material.

8. Pair work. Think of the transport problems scientists have.

Дата добавления: 2014-12-26