Canine leishmaniosis vaccine: for which dogs and its limits
8-month-old Boxer living in Murcia. The owners want to vaccinate him against leishmaniosis and ask whether they can then do without the collar.
Which statement is correct?
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A. Once vaccinated, the repellent collar is no longer needed
The vaccine does not prevent the bite or infection; it only reduces the risk of the dog developing clinical disease. The repellent remains the main measure.
B. Healthy, seronegative dogs are vaccinated from the age stated in the product information; it reduces the likelihood of clinical disease but does not prevent infection, and the repellent is maintained
Correct. Before vaccinating, check the dog is seronegative (and healthy). The vaccine improves the immune response to the parasite, but its efficacy is partial: it is always combined with repellents and management.
C. It is indicated in sick dogs as immunotherapy, alongside leishmanicidal treatment
The marketed vaccines are authorised only for prevention in healthy, uninfected dogs; they are not a treatment.
D. It protects from the day of vaccination, so it can be given just before the season
Immunity takes weeks to develop. If vaccination is planned, it should be done well ahead of the sandfly season.
lightbulb Key takeaway
No single measure prevents leishmaniosis. The soundest strategy combines a repellent (collar or spot-on) with management measures and, if desired, vaccine or domperidone. Carry out annual serological checks in dogs in endemic areas.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.