Skip to main content

LS Mass II (Canada)

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

LS Mass II

This treatment applies to the following species:
Company: Zoetis

Newcastle-Bronchitis Vaccine

B1 Type, LaSota Strain, Mass. Type, Live Virus

For Veterinary Use Only

Read in full, follow directions carefully.

Store this vaccine under 7°C (45°F).

Do not vaccinate within 21 days before slaughter.

Use entire contents of vial when first opened.

Burn vaccine container and all unused contents.

For drinking-water vaccination

LS Mass II is a combination live-virus vaccine. The Newcastle fraction is the B1 type, LaSota strain, and the bronchitis fraction is prepared from a modified strain of infectious-bronchitis virus, Massachusetts type. This vaccine is recommended as an aid in the prevention of Newcastle disease and of infectious bronchitis, Massachusetts serotype.


For Drinking-water Vaccination

LS Mass II Newcastle-Bronchitis Vaccine is recommended for the vaccination of healthy chickens 2 weeks of age or older. If chickens are vaccinated by this route before 2 weeks of age, they should be revaccinated.

1. Discontinue use of medications or sanitizing agents in the drinking water 24 hours before vaccinating. Do not resume use for 24 hours following vaccination.

2. Water used for the drinking-water administration of a live virus vaccine must be non-chlorinated.

3. Provide enough waterers so two-thirds of the birds may drink at one time. Scrub waterers with fresh, clean, non-chlorinated water, and use no disinfectant. Let the waterers drain dry.

4. Turn off automatic waterers, so the only available water is the vaccine water. Do not give vaccine water through medication tanks.

5. Withhold water for 2 to 4 hours before vaccinating. Do not deprive the birds of water if the temperature is extremely high.

6. Remove seal from vaccine vial.

7. Remove stopper and half-fill vial with clean, cool, non-chlorinated water.

8. Replace stopper and shake until dissolved.

9. Use a clean container two-thirds filled with cool, clean, non-chlorinated water. Add dried milk at a rate of 284 grams (10 ounces) per 95 liters (25 gallons) of the final volume of vaccine solution. Stir the mixture until the dried milk is dissolved.

10. Add the rehydrated vaccine from the vial and again stir the contents thoroughly.

11. Next, add the mixture to the final volume of water, as follows:

Add this amount of Vaccine

to this final amount of water

for chickens 2 to 8 weeks old

for chickens over 8 weeks old

10,000 doses

95 to 190 liters (25 to 50 gallons)

190 to 380 liters (50 to 100 gallons)

12. Give 1 dose of vaccine per bird.

13. Distribute the final volume of (vaccine) water evenly among the clean waterers. Do not place the waterers in direct sunlight. Resume regular water administration only after all the vaccine water has been consumed.


For growing chickens intended for replacement flocks or breeder flocks, it is advisable to revaccinate in advance of the onset of egg production.


If possible, vaccinate all susceptible birds on the premises at the same time. For 10 to 14 days after vaccinating, avoid carrying vaccine particles on shoes, clothing, etc., into areas where there are unvaccinated birds.

Newcastle Disease Vaccine virus is capable of causing a mild, irritating eye infection in humans, lasting about 3 days. Do not allow vaccine to contact the eyes.

LS Mass II Caution

This product should be stored, transported, and administered in accordance with the instructions and directions.

The use of this vaccine is subject to state laws, wherever applicable.

Contains gentamicin as a preservative.


Keep a record of vaccine serial number and expiration date; date of receipt and date of vaccination; where vaccination takes place; and any reactions observed.

This product is nonreturnable.

10 x 1,000 Doses

No. 58193: 10 x 10,000 Doses

U.S. Vet. License No. 190

Zoetis Inc., Kalamazoo, MI 49007, USA


CPN: 1198386.3

Order Desk:   800-663-8888
Technical Services Canada:   800-461-0917
Technical Services USA:   800-366-5288
THIS SERVICE AND DATA ARE PROVIDED "AS IS". Animalytix assumes no liability, and each user assumes full risk, responsibility, and liability, related to its use of the Animalytix service and data. See the Terms of Use for further details.

Copyright © 2024 Animalytix LLC. Updated: 2024-02-27