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Leptospirosis in the Netherlands: Addressing Anti-Vaxx Movement Concerns

Explore the impact of the anti-vaxx movement on leptospirosis in the Netherlands, focusing on key serovars, prevalence in humans and dogs, vaccination strategies, and potential risks of decreased vaccination rates. Learn about effective interventions to promote vaccination and prevent disease outbreaks.

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Leptospirosis in the Netherlands: Addressing Anti-Vaxx Movement Concerns

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  1. The Netherlands

  2. The anti-vaxxmovement in the Netherlands- Focus on leptospirosis (Weil’sdisease) - Narita Burggraaff 1st year Master student Companion Animals Faculty of veterinaryMedicine

  3. Leptospirosis Gram-negativespirochetes Species  Serogroups Serovar • 8 pathogenic species (e.g. L. icterohaemorrhagiae) • 29 serogroups, ~300 pathogenicserovars Animals species

  4. Cycle of epidemiology

  5. Zoonosis Main source of infection (small rodents) Same serovars Symptoms in incidentalhosts • Human • Dog

  6. Leptospirosis in the NL Mandatorynotifiable Important serogroupsandserovars • Icterohaemorrhagiae(serovarsIcterohaemorrhagiaeandCopenhageni) • Grippotyphosa(serovarGrippotyphosa) Prevalencein humansanddogs

  7. Prevalence in humans (NL)

  8. Prevalence in dogs (NL)

  9. Leptospirosainterrogans in the NL Serogroups of L. interrogans: • L. icterohaemorhagiae serovarIcterohaemorrhagiae: Weil’sdisease • L. canicola • L. hardjo • L. pomona • L. grippotyphosa

  10. Weil’s disease in dogs Weil’sdisease Reservoir Symptoms

  11. Dog vaccinations in the NL • CDV • HCC • CPV • Leptospirosis

  12. Vaccination of dogs against leptospirosis Bivalent vaccine: serovarsIcterohaemorrhagiaeandCanicola Annualrevaccination Currentvaccinationrate: 55%

  13. The ‘anti-vaxx’ movement in the NL Slightdecrease in vaccinationrate in dogs  Risks?

  14. Is this a problem? Subjects of discussion: Higherrisks of outbreaks Different per disease Herd immunityonly at ~70% THM: population individual

  15. Alternativesforvaccinationtopreventdisease At-risk groups Doctors andveterinarians Effective pest control Prophylactic AB?

  16. Minimizingvaccinationsbytitration? Postponement of othervaccinations or every 3 years(vaccinationguidelines)

  17. Minimizingvaccinationsbytitration? At which titer exactly? Sensitivityandreliability of testing Basic vaccinations Annualvaccinations ?

  18. Motivatingpeopletovaccinatetheir pet Systematicbehavioural change  ‘InterventionMapping’ Balancedcommunication Intervention design

  19. Conclusion .

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