Skip to Content

LT Blen (Canada)

This page contains information on LT Blen for veterinary use.
The information provided typically includes the following:
  • LT Blen Indications
  • Warnings and cautions for LT Blen
  • Direction and dosage information for LT Blen

LT Blen

This treatment applies to the following species:
Manufacturer: Merial

Fowl Laryngotracheitis Vaccine

Modified Live Virus

LT Blen Indications

This vaccine contains a modified live fowl laryngotracheitis virus for the initial vaccination or revaccination of healthy chickens four weeks of age or older by eyedrop or by drinking water as an aid in the prevention of fowl laryngotracheitis. It is essential that the chickens be maintained under good environmental conditions and that exposure to disease viruses be reduced as much as possible.

Store vaccine at 2-7°C (35-45°F). Do not freeze. Do not vaccinate within 21 days before slaughter. Use entire vial contents within four hours of opening. Burn this container and all unused contents. Contains gentamicin as a bacteriostatic agent.

Intraocular Vaccination

The vaccine used for intraocular vaccination is accompanied by diluent and is recommended for the vaccination of healthy chickens four weeks of age or older using only the 1,000 dose or 2,000 dose vial.

1. Reconstitute each 1,000 doses of vaccine with 30 mL of diluent.

a. Remove aluminum seal and rubber stopper from vaccine vial and diluent vial. Avoid contamination of stoppers and contents.

b. Add diluent to half-fill the vaccine vial. Replace stopper in vial and shake it so that all contents are dissolved.

c. Pour the reconstituted vaccine into the diluent container. Replace stopper in diluent container and shake.

d. Remove stopper and fit drop-dispenser tip into diluent container.

2. Holding the diluent container with the dropper tip down, gently press the sides, dropping one drop of vaccine on the bird’s eye. Be sure the vaccine spreads over the eye before releasing the bird.

Drinking Water Vaccination Using Pouring Application

Drinking water vaccination is recommended for healthy chickens at least four weeks of age.

1. Remove all medications, sanitizers and disinfectants from the drinking water 72 hours (three days) prior to vaccination.

2. Provide sufficient waterers so that all the chickens can drink at one time. Shut off water supply and allow chickens to consume all the water in the lines.

3. Raise water lines above the chickens’ heads. Clean and rinse the waterers thoroughly.

4. Withhold all water from the chickens for a minimum of two hours in warm weather to four hours in cool weather prior to vaccination to stimulate thirst. Withdrawal time should be reduced if half-house brooding is in process.

5. Do not open or mix vaccine until ready to vaccinate.

6. Drinking water for vaccine delivery should contain 29 g (one ounce) of non-fat dry milk per 3.8 liters (US gallon) of non-chlorinated water, or should contain milk product based stabilizer prepared according to the manufacturer’s instructions.

7. Reconstitute the vaccine in 11 liters (3 US gallons) of milk-water during cool weather or 15 liters (4 US gallons) of milk-water during warm weather for each 1,000 doses.

8. Distribute vaccine solution among waterers. Avoid direct sunlight.

9. Lower waterers and allow the chickens to drink freely. Add the remaining vaccine solution to the water lines as the chickens drink.

10. Do not provide additional drinking water until all the vaccine is consumed.

Drinking Water Vaccination Using Proportioner Application

Drinking water vaccination is recommended for healthy chickens at least four weeks of age. Several types of medicator/proportioners are commercially available. Set proportioner to deliver 30 mL (one ounce) of vaccine concentrate per 3.8 liters (one US gallon) of water.

1. Remove all medications, sanitizers and disinfectants from the drinking water 72 hours (three days) prior to vaccination.

2. Clean all containers, hoses and waterers prior to vaccination.

3. Withhold all water from the chickens for a minimum of two hours in warm weather to four hours in cool weather prior to vaccination to stimulate thirst. Withdrawal time should be reduced if half-house brooding is in process.

4. Do not open or mix vaccine until ready to vaccinate.

5. Calculate to supply vaccine solution at a rate of 11 liters (3 US gallons) per 1,000 chickens in cool weather and 15 liters (4 US gallons) per 1,000 chickens in warm weather. The age of the chickens should be considered when calculating water supply. Always use non-chlorinated water when vaccinating chickens.

Example

1,000 chickens in cool weather x 11 liters (3 US gallons) = 11 liters (3 US gallons).

1,000 chickens in warm weather x 15 liters (4 US gallons) = 15 liters (4 US gallons).

6. Prepare vaccine stock solution as follows:

a. Determine the quantity of vaccine concentrate required by multiplying 30 mL (one ounce) x multiples of 3.8 liters (US gallon) of water needed for vaccine/drinking water.

Example

For 1,000 chickens: 3 volumes of 3.8 liters (1 US gallon) x 30 mL (1 oz) = 90 mL (3 oz).

b. Add 85 g (3 ounces) of non-fat dry milk per 480 mL (16 ounces) of cool water, or use a commercial milk product based stabilizer according to the manufacturer’s instructions. For 1,000 chickens add 16 g (0.5 ounces) non-fat dry milk to the 90 mL (3 ounces) of water.

c. Reconstitute the lyophilized vaccine with the milk solution. Rinse the vaccine vial to remove all the vaccine.

7. Insert proportioner hose into the vaccine stock solution and start water flow. Continue until all solution has been consumed before changing water supply to direct flow.

8. Do not medicate or use disinfectants for 24 hours after vaccination.

Precautions

When the vaccine is administered by eyedrop, a mild conjunctivitis often associated with slight lacrimation appearing at about the fourth or fifth day post-vaccination and disappearing about the seventh or eighth day post-vaccination is frequently seen in some birds. The conjunctivitis may be accentuated in dry and dusty houses because of the additional irritation of dust particles.

Vaccinate all chickens on the premises at one time.

For eyedrop vaccination, mix the vaccine and diluent one vial at a time, and use within four hours of opening.

Do not attempt to save any unused portion of vaccine and do not stretch the dosage.

Do not spill or splatter the vaccine and avoid contaminating your hands, eyes and clothing with the vaccine.

The vaccine is prepared for the vaccination of healthy birds. Improper handling or administration may result in variable responses.

Avoid stress conditions during and following vaccination.

Do not vaccinate diseased chickens.

Do not place chickens in contaminated facilities.

Exposure to disease must be minimized as much as possible.

For veterinary use only.

Notice

Merial’s vaccines have met the requirements of the USDA/CFIA in regard to safety, purity, and potency. This vaccine has been tested by the master seed immunogenicity test for efficacy.

LT Blen Caution

The capability of this vaccine to produce satisfactory results depends upon many factors, including - but not limited to - conditions of storage and handling by the user, administration of the vaccine, health and responsiveness of individual chickens, and degree of field exposure. Therefore, directions for use should be followed carefully. The use of this vaccine is subject to applicable local laws and regulations.

THIS VACCINE IS NON-RETURNABLE

MERIAL, INC., Athens, GA 30601 USA

U.S. Vet Lic. No. 298

Product Codes: 5280-15, 5280-75, and 5280-20

PA-1M/PB-2M/PC-5M

2050-5296-00

Presentation: 1,000 doses and 5,000 doses.

NAC No.: 1182099.4

MERIAL CANADA INC.
20000 CLARK GRAHAM, BAIE D'URFÉ, QC, H9X 4B6
Telephone:   514-457-1555
Order Desk:   888-637-4251 (888-MERIAL1)
Fax:   514-457-1175
Website:   www.merial.ca
Email:   service.canada@merial.com
Every effort has been made to ensure the accuracy of the LT Blen information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the Canadian product label or package insert.

Copyright © 2016 North American Compendiums. Updated: 2016-10-31

Hide