A field study evaluating the humoral immune response in Mongolian sheep vaccinated against sheeppox virus.
Transbound Emerg Dis
; 69(4): 1837-1846, 2022 Jul.
Article
en En
| MEDLINE
| ID: mdl-34033248
ABSTRACT
Sheeppox is a transboundary disease of small ruminants caused by infection with the capripoxvirus sheeppox virus. Sheeppox is found in Africa, the Middle East and Asia and is characterized by fever, multifocal cutaneous raised lesions and death. Vaccination with live attenuated capripoxvirus (CPPV) strains is an effective and widely used strategy to contol sheeppox outbreaks; however, there are few reports of post-vaccination field surveillance studies. This study used a commercially available enzyme-linked immunosorbent assay (ELISA) to examine quantitative and temporal features of the humoral response of sheep vaccinated with a live-attenuated CPPV strain in Mongolia. Four hundred samples were tested using the ELISA commercial kit, and a subset of 45 samples were also tested with a virus neutralization test (VNT). There was substantial agreement between the VNT and ELISA tests. Antibodies to CPPV were detected between 40 and 262 days post-vaccination. There was no significant difference between serological status (positive/negative) and sex or age; however, an inverse correlation was found between the length of time since vaccination and serological status. Animals between 90 and 180 days post-vaccination were more likely to be positive than animals greater than 180 days post-vaccination. Our results show that a commercial CPPV ELISA kit is a robust and reliable assay for post-CPPV vaccination surveillance in resource-restricted settings and provide temporal parameters to be considered when planning sheeppox post-vaccination monitoring programmes.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedades de las Ovejas
/
Capripoxvirus
/
Infecciones por Poxviridae
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
En
Revista:
Transbound Emerg Dis
Asunto de la revista:
MEDICINA VETERINARIA
Año:
2022
Tipo del documento:
Article
País de afiliación:
Reino Unido