Skip to main content

Case-Bac (Canada)

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


This treatment applies to the following species:
Company: Colorado Serum


This product has been shown to be effective for the vaccination of healthy sheep against caseous lymphadenitis (CLA).

This product is a detoxified and purified whole culture of Corynebacterium pseudotuberculosis.

CLA is a chronic disease of sheep, goats, and other small ruminants in which clinical signs and lesions may not be seen for several months after infection. Causative bacteria can settle on skin, allowing exposure through wounds, then migrating to lymph nodes. Pulmonary transfer can also occur, especially in crowded conditions. CLA presents with both internal and external abscesses and lesions.

This product was licensed prior to the requirement to establish a minimum age for use. The duration of immunity is unknown. Safety in pregnant animals is unknown.

For more information regarding efficacy and safety data, see

Directions For Use

Do not vaccinate within 21 days before slaughter. Shake well before use. Use entire contents when first opened. Store at 2°-8°C. Do not freeze. Do not mix with other products.

DOSAGE & ADMINISTRATION: Inject 2 ml subcutaneously in axillary space. Revaccinate in 4 weeks in opposite axillary space. Historically, annual vaccination is recommended. Contact veterinarian for advice.


Anaphylactoid reaction may occur following administration of products of this nature. If noted, administer adrenalin or equivalent. Delayed treatment could result in an irreversible reaction. Following vaccination, slight lameness (soreness) in lambs may be observed, along with lethargy, in a percentage of the mature animals. It has also been shown that little or no benefit can be expected when animals with visible signs of the disease are vaccinated. Those showing infection should be disposed of or immediately culled from the flock and quarantined.

This product is not recommended for goats, as previous safety studies showed a higher than accepted presence of fever and lethargy following vaccination.

In case of human exposure, consult a physician.

Contains thimerosal as preservative.

Conveniently packaged in 10 dose and 50 dose sizes.


VLN: 188 / PCN: 7A94.00

COLORADO SERUM COMPANY, 4950 York Street, Denver, Colorado 80216





Order #

20 ml

10 doses


100 ml

50 doses


CPN: 1174004.4

4950 YORK STREET, P.O. BOX 16428-0428, DENVER, CO, 80216-0428
Telephone:   303-295-7527
Order Desk:   800-525-2065
Fax:   303-295-1923
This service and data are provided "AS IS". DVMetrics and assumes no liability, and each user assumes full risk, responsibility, and liability, related to its use of the DVMetrics and services and data. See the terms of use for further details.

Copyright © 2022 Animalytix LLC. Updated: 2021-11-29