Defensor 1 (Canada)This page contains information on Defensor 1 for veterinary use.
The information provided typically includes the following:
- Defensor 1 Indications
- Warnings and cautions for Defensor 1
- Direction and dosage information for Defensor 1
Defensor 1This treatment applies to the following species:
For use in dogs and cats
PRODUCT DESCRIPTION: Defensor 1 is for vaccination of healthy dogs and cats 3 months of age or older as an aid in preventing rabies. The vaccine is prepared from cell-culture-grown, chemically inactivated rabies virus. The seed virus is a highly immunogenic, fixed strain of rabies virus which originated from Louis Pasteur’s original isolate in 1882. The inactivated virus is formulated with a highly purified adjuvant and is packaged in liquid form.
DISEASE DESCRIPTION: Rabies is a worldwide, high mortality disease affecting mammalian species. Wild animals are common vectors of the disease and the major source of transmission to humans and domestic animals. Despite successful attempts over the years to reduce the incidence of rabies, recent published reports indicate that in the U.S. more than 30,000 people undergo treatment every year for possible exposure.1 Domestic animals are the major source of exposure for humans. Since 1980, the most commonly reported rabid domestic animals have been cats, cattle, and dogs. In 1990, a total of 4,881 cases of animal rabies were reported to the Center for Disease Control by all 50 states, the District of Columbia, and Puerto Rico.2 Susceptibility to rabies varies according to pet species. Rabies is not a treatable disease and suspect pets are usually quarantined until a clinical diagnosis is made, at which time they are destroyed.
The route of infection can be oral, respiratory, or parenteral. Following infection, a paralytic syndrome ensues, emerging as either the “furious” or “dumb” form. “Furious rabies” is characterized by unusual aggression; “dumb rabies” by lethargy and a desire to avoid contact. Respiratory failure is the immediate cause of death.
SAFETY AND EFFICACY: Because Defensor 1 is produced in an established cell line, it has safety advantages over inactivated brain-origin rabies vaccines. Tissue-origin vaccines contain extraneous protein in addition to rabies antigen that can lead to autoimmune disease.
The established cell line used in Defensor 1 has been extensively tested for freedom from contaminating agents. In addition, use of an established cell line yields a vaccine of consistent potency from serial to serial. Defensor 1 has proven to be uniformly safe in experimental tests, and no significant adverse reactions were reported in extensive clinical trials of the vaccine.
A duration of immunity study, conducted in accordance with federal regulation and under U.S. Department of Agriculture direction, demonstrated that a 1-mL dose met federal guidelines for protection of dogs and cats against virulent challenge administered more than a year after vaccination.
Directions For Use
1. General Directions: Shake well. Aseptically administer 1 mL subcutaneously. Dogs may be vaccinated intramuscularly or subcutaneously.
2. Primary Vaccination: Healthy dogs and cats should receive a single dose at 3 months of age or older. A repeat dose should be administered 1 year later.
3. Revaccination: Annual revaccination with a single dose is recommended.
1. Store at 2°-7°C. Prolonged exposure to higher temperatures may adversely affect potency. Do not freeze.
2. Use entire contents when first opened.
3. Sterilized syringes and needles should be used to administer this vaccine.
4. Contains gentamicin as preservative.
5. As with many vaccines, anaphylaxis may occur after use. Initial antidote of epinephrine is recommended and should be followed with appropriate supportive therapy.
6. This product has been shown to be efficacious in healthy animals. A protective immune response may not be elicited if animals are incubating an infectious disease, are malnourished or parasitized, are stressed due to shipment or environmental conditions, are otherwise immunocompromised, or the vaccine is not administered in accordance with label directions.
1. Kaplan MM, Koprowski H: Rabies. Austr Vet Pract 10:208-215, 1980.
2. Uhaa IJ, Mandell EJ, Whiteway R, et al: Rabies surveillance in the United States during 1990. Am J Vet Med 200:920-929, 1992.
Technical inquiries should be directed to Pfizer Animal Health Technical Services, (800) 366-5288 (USA), (800) 461-0917 (Canada).
For veterinary use only
U.S. Veterinary License No. 189
Pfizer Animal Health, Exton, PA 19341, USA, Div. of Pfizer Inc, NY, NY 10017
® Registered trademark of Pfizer Products Inc; Pfizer Canada Inc., licensee
Presentation: Available in 1 x 10 dose and 50 x 1 dose vials.
NAC No.: 11980353
16,740 TRANS-CANADA HIGHWAY, KIRKLAND, QC, H9H 4M7
|Technical Services Canada:||800-461-0917|
|Technical Services USA:||800-366-5288|
|Every effort has been made to ensure the accuracy of the Defensor 1 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 © 2015 North American Compendiums. Updated: 2015-08-17