Vaccination with EG95 against ovine cystic echinococcosis in the province of Río Negro: analysis of 12 years of work

  • José Luis Labanchi Ministerio de Salud de la Provincia de Río Negro Viedma, Argentina
  • Verónica Thelma Poggio Instituto de Ciencia y Tecnología César Milstein (CONICET)
  • Guillermo Bernardo Mujica Salud Ambiental Bariloche, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Ariana Gutierrez Instituto Nacional de microbiologia ANLIS/MALBRAN
  • Daniel Araya Salud Ambiental Los Menucos, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Claudia Grizmado Salud Ambiental Roca, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Arnoldo Calabró Salud Ambiental SAO, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Marcos Seleiman Salud Ambiental Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Gabriel Talmón Salud Ambiental Bariloche, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Luis Sepúlveda Salud Ambiental Bariloche, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina
  • Edmundo Juan Larrieu Universidad Nacional de La Pampa. Facultad de Ciencias Veterinarias https://orcid.org/0000-0002-4961-894X

DOI:

https://doi.org/10.19137/cienvet202224209

Keywords:

Echinococcosis, Epidemiology, Vaccine, Sheep

Abstract

Cystic echinococcosis (CE) is a zoonosis caused by species of the complex Echinococcus granulosus, sensu lato in their larval stage. It is an endemic disease in the province of Río Negro, where lamb vaccination with EG95 was incorporated in 2009 with very good results: in fact, it contributed to a significant drop in prevalence of infection in diverse hosts. However, impact studies have revealed the need to improve understanding of local epidemiology. The objective was to identify causes which can still generate infection in dogs. In indigenous reserves comprised within the area of lamb vaccination with 3 doses of EG95, prevalence in adult caprines and ovines was determined by necropsy and serology (ELISA). Through serology, infection rates in vaccinated and non-vaccinated ovines were significantly different (p= 0.0004), as well as between non-vaccinated ovines and goats (p= 0.0013); on the other hand, infection rate differences between vaccinated sheep and non-vaccinated goats turned out non-significant (p= 0.254). Through necropsy, such difference between vaccinated and non-vaccinated ovines turned out significant (p= 0.0016); between non-vaccinated ovines and non-vaccinated goats, it proved non-significant (p= 0.23). With reference to epidemiology and control along the period 2018- 2022, vaccination strategy was maintained, and 2 extra deworming tasks were introduced, performed by the vaccination team. Assessment of animal slaughter for consumption in 41 producers showed that 21 of them slaughter a monthly average of 18 goats, and 36 in all slaughter 35 old sheep. Design and implementation of programme resulted cost-effective, since it was possible to maintain them over time, with clear impact on prevalence decrease in diverse hosts

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Author Biographies

Verónica Thelma Poggio, Instituto de Ciencia y Tecnología César Milstein (CONICET)

Investigadora CONICET

Guillermo Bernardo Mujica, Salud Ambiental Bariloche, Ministerio de Salud, Provincia de Río Negro, Viedma, Argentina

Supervisor Salud Ambiental. Ministerio Salud. Rio Negro

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Published

2022-09-05

How to Cite

Labanchi, J. L., Poggio, V. T., Mujica, G. B., Gutierrez, A., Araya, D., Grizmado, C., … Larrieu, E. J. (2022). Vaccination with EG95 against ovine cystic echinococcosis in the province of Río Negro: analysis of 12 years of work. Ciencia Veterinaria, 24(2), 241–254. https://doi.org/10.19137/cienvet202224209

Issue

Vol. 24 No. 2 (2022): Ciencia Veterinaria

Section

Comunicaciones

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