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Exposición al ricketsial en rumiantes de Somalia
Aamir M Osman1, Igor S Silito2, Ahmed A Hassan-Kadle3
1Graduate Program on Veterinary Sciences, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Somali One Health Centre, Abrar University, Somalia; Department of Animal Health and Veterinary Services, Ministry of Livestock, Forestry, and Range, Mogadishu, Somalia.
Ticks and tick-borne diseases
|September 6, 2025
Resumen
La exposición a rickettsia en el ganado somalí es alta, con un 50,5% de los animales que dieron positivo. El ganado bovino mostró la mayor seroreactividad, lo que indica un riesgo zoonótico potencial para Rickettsia africae en la región.
Área de la Ciencia:
- Microbiología veterinaria
- Enfermedades zoonóticas
- Entomología de la salud pública
Sus antecedentes:
- Las especies de Rickettsia son bacterias intracelulares obligadas Gram-negativas transmitidas por garrapatas, que representan riesgos zoonóticos.
- El estado de la rickettsiosis en el ganado y las poblaciones humanas de Somalia sigue sin caracterizarse en gran medida.
- Las garrapatas Amblyomma son vectores de Rickettsia africae, un patógeno zoonótico significativo.
Objetivo del estudio:
- Investigar la evidencia serológica de la exposición de especies de Rickettsia en el ganado en Somalia.
- Determinar la prevalencia de anticuerpos contra Rickettsia africae y Rickettsia rhipicephali en rumiantes.
- Evaluar las posibles implicaciones zoonóticas de Rickettsia spp. en las regiones estudiadas.
Principales métodos:
- Estudio transversal de 372 muestras de suero de cabras, bovinos y ovinos en las regiones de Benadir y Lower Shabelle.
- Pruebas de inmunofluorescencia indirectas (IFA) utilizadas para detectar anticuerpos contra R. africae y R. rhipicephali.
- Análisis serológico con dos diluciones en serie a partir de 1:64.
Principales resultados:
- Seropositividad general para Rickettsia spp. fue del 50,5% (188/372) con títulos que oscilaron entre 1: 64 y 1: 048.
- Se detectaron anticuerpos de R. africae en el 21,0% (78/372), R. rhipicephali en el 10,2% (38/372) y co-reactividad en el 19,4% (72/372).
- El ganado bovino mostró la mayor seroreactividad (90,2%), seguido por el ganado ovino (28,6%) y el ganado caprino (28,4%). Las vacas y las ovejas eran significativamente más propensas a ser seropositivas que las cabras.
Conclusiones:
- Este estudio presenta la primera evidencia serológica de Rickettsia spp. exposición en rumiantes en Somalia.
- Los bovinos demuestran una mayor susceptibilidad a la infección por Rickettsia, lo que sugiere su papel como posibles centinelas para la exposición humana.
- Los resultados ponen de relieve la necesidad de una mayor investigación sobre Rickettsia spp. Prevalencia y riesgos zoonóticos asociados en Somalia.
Palabras clave:
Rickettsia africana, también conocida como rickettsia africanaEnfermedades de RickettSomalia, por ejemploÁfrica al sur del SaharaEnfermedades transmitidas por garrapatasMás Videos Relacionados
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