Vaccination is the most effective method of protection against preventable infectious diseases in dogs and cats. The vaccination guidelines, regularly updated by the WSAVA (World Small Animal Veterinary Association) Vaccination Guidelines Group, form the foundation of evidence-based veterinary medicine. This article comprehensively covers the core/non-core vaccine classification according to the WSAVA 2024 guidelines, maternal antibody interference, vaccine titration, and risk-based protocols.
WSAVA Principle
"Every animal should be protected with core vaccines, while non-core vaccines should be administered based on individual risk assessment." WSAVA recommends avoiding unnecessary vaccination and utilizing vaccine titration (Day et al., 2024).
1. Core and Non-Core Vaccine Classification
1.1 Definitions
Definition: Vaccines that all dogs and cats, regardless of geographic location, should receive throughout their lives.
Rationale: High mortality/morbidity, zoonotic potential, widespread distribution
Definition: Vaccines recommended based on geographic region, lifestyle, or individual risk factors.
Rationale: Regional diseases, specific exposure risks
1.2 Vaccine Classification in Dogs
| Category | Disease | Agent | DOI* |
|---|---|---|---|
| CORE | Distemper | Canine Distemper Virus (CDV) | ≥3 years |
| Parvovirus | Canine Parvovirus-2 (CPV-2) | ≥3 years | |
| Hepatitis (Adenovirus) | Canine Adenovirus-2 (CAV-2) | ≥3 years | |
| Rabies | Rabies virus | 1-3 years** | |
| NON-CORE | Leptospirosis | Leptospira spp. | 1 year |
| Kennel Cough | Bordetella bronchiseptica | 1 year | |
| Parainfluenza | Canine Parainfluenza Virus | 1-3 years | |
| Lyme Disease | Borrelia burgdorferi | 1 year |
*DOI: Duration of Immunity | **Varies by national legislation
1.3 Vaccine Classification in Cats
| Category | Disease | Agent | DOI |
|---|---|---|---|
| CORE | Panleukopenia | Feline Panleukopenia Virus (FPV) | ≥3 years |
| Herpesvirus | Feline Herpesvirus-1 (FHV-1) | ≥3 years | |
| Calicivirus | Feline Calicivirus (FCV) | ≥3 years | |
| Rabies | Rabies virus | 1-3 years | |
| NON-CORE | Feline Leukemia | Feline Leukemia Virus (FeLV) | 1 year |
| Chlamydiosis | Chlamydia felis | 1 year | |
| Bordetellosis | Bordetella bronchiseptica | 1 year |
2. Puppy and Kitten Vaccination Protocol
2.1 Maternally Derived Antibody (MDA) Interference
Puppies and kittens acquire passive immunity through their mother's milk (colostrum). These maternally derived antibodies (MDA) can decrease vaccine efficacy by neutralizing vaccine antigens:
MDA Half-Life
- In dogs: ~10 days (8-14 weeks of protection for CPV)
- In cats: ~15 days (8-12 weeks of protection for FPV)
Therefore, the final vaccine dose should be administered at 16 weeks of age or older.
2.2 WSAVA Puppy/Kitten Vaccination Schedule
| Age | Dog | Cat |
|---|---|---|
| 6-8 weeks | DHP (1st dose) | FVRCP (1st dose) |
| 10-12 weeks | DHP (2nd dose) ± Lepto | FVRCP (2nd dose) ± FeLV |
| 14-16 weeks | DHP (3rd dose) ± Lepto + Rabies | FVRCP (3rd dose) ± FeLV + Rabies |
| ≥16 weeks | Critical: Final dose must be at 16 weeks or later (MDA interference) | |
| 6-12 months (booster) | DHP + Rabies | FVRCP + Rabies |
Critical Warning
If the final vaccine dose is administered before 16 weeks, sufficient immunity might not develop due to MDA interference. This situation is termed the "immunity gap" and leaves the young animal susceptible to infection.
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Vaccination Schedule Calculator3. Adult Vaccination Protocol
3.1 Booster Intervals
WSAVA recommends avoiding unnecessary vaccination and utilizing vaccine titration:
- First booster: After 12 months
- Subsequent boosters: Every 3 years
- Alternative: Serological titration
- Leptospirosis: Annually
- Bordetella: Annually (if at risk)
- FeLV: Annually (outdoor cats)
3.2 Vaccine Titration
Serological titration measures protective antibody levels, preventing unnecessary vaccination:
| Disease | Protective Titer | Test Method |
|---|---|---|
| CDV (Distemper) | ≥1:16 (VN) or positive (ELISA) | VN, ELISA, IFA |
| CPV (Parvovirus) | ≥1:80 (HI) or positive (ELISA) | HI, ELISA |
| CAV (Adenovirus) | ≥1:16 (VN) | VN |
| FPV (Panleukopenia) | ≥1:40 (HI) | HI, ELISA |
4. Special Considerations in Turkey
4.1 Rabies Vaccine Requirement
In Turkey, the rabies vaccine is a legal requirement:
- First vaccine: at 3 months of age
- Booster: Annually (some vaccines have a 3-year license)
- Travel: A titer test may be required for entry into EU countries
4.2 Regional Risk Factors
- Leptospirosis: Humid regions, water sources
- Leishmaniasis: Aegean and Mediterranean coasts
- Ehrlichiosis: Tick-endemic regions
- Shelter/Boarding: Bordetella, CIRDC
- Outdoor cats: FeLV, FIV
- Hunting dogs: Leptospirosis, Lyme
5. Vaccine Side Effects and Contraindications
5.1 Common Side Effects
- Local: Swelling and pain at the injection site (1-3 days)
- Systemic: Mild fever, lethargy, anorexia (24-48 hours)
- Rare: Anaphylaxis (within minutes), autoimmune reactions
5.2 FISS (Feline Injection-Site Sarcoma) in Cats
FISS Risk
Adjuvanted vaccines in cats increase the risk of sarcoma development at the injection site (1:10,000-1:30,000).
Precaution: Non-adjuvanted vaccines should be preferred, and vaccines should be administered to distal extremities (the 3-2-1 rule).
6. Conclusion
Vaccination is the most effective method of protection against preventable diseases in dogs and cats. WSAVA guidelines support evidence-based, individualized vaccination protocols. Core vaccines should be administered to all animals, while non-core vaccines should be planned according to a risk assessment. Vaccine titration is a valuable tool to prevent unnecessary over-vaccination.
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References
- Day, M. J., et al. (2024). WSAVA guidelines for the vaccination of dogs and cats. Journal of Small Animal Practice, 65(1), 1-35.
- Ford, R. B., et al. (2017). 2017 AAHA canine vaccination guidelines. Journal of the American Animal Hospital Association, 53(5), 243-251.
- Scherk, M. A., et al. (2013). 2013 AAFP feline vaccination advisory panel report. Journal of Feline Medicine and Surgery, 15(9), 785-808.
- Schultz, R. D. (2006). Duration of immunity for canine and feline vaccines: A review. Veterinary Microbiology, 117(1), 75-79.
- Tizard, I. R. (2021). Veterinary immunology (10th ed.). Elsevier.
- WSAVA. (2024). WSAVA vaccination guidelines. World Small Animal Veterinary Association.