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Development of Differentiating Infected from Vaccinated Animals (DIVA) Real-Time PCR for African Horse Sickness Virus Serotype 1
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Development of Differentiating Infected from Vaccinated Animals (DIVA) Real-Time PCR for African Horse Sickness Virus Serotype 1
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Journal Article
Development of Differentiating Infected from Vaccinated Animals (DIVA) Real-Time PCR for African Horse Sickness Virus Serotype 1
2022
Overview
African horse sickness (AHS) is a highly infectious and often fatal disease caused by 9 serotypes of the orbivirus African horse sickness virus (AHSV). In March 2020, an AHS outbreak was reported in Thailand in which AHSV serotype 1 was identified as the causative agent. Trivalent live attenuated vaccines serotype 1, 3, and 4 were used in a targeted vaccination campaign within a 50-km radius surrounding the infected cases, which promptly controlled the spread of the disease. However, AHS-like symptoms in vaccinated horses required laboratory diagnostic methods to differentiate infected horses from vaccinated horses, especially for postvaccination surveillance. We describe a real-time reverse transcription PCR-based assay for rapid characterization of the affecting field strain. The development and validation of this assay should imbue confidence in differentiating AHS-vaccinated horses from nonvaccinated horses. This method should be applied to determining the epidemiology of AHSV in future outbreaks.
Publisher
Centers for Disease Control and Prevention (CDC),U.S. National Center for Infectious Diseases,Centers for Disease Control and Prevention
Subject
/ African Horse Sickness - diagnosis
/ African Horse Sickness - epidemiology
/ African Horse Sickness - prevention & control
/ African Horse Sickness Virus
/ African Horse Sickness Virus - genetics
/ AHSV-1
/ Animals
/ Control
/ Design
/ Genomes
/ Horses
/ Infectious and parasitic diseases
/ Medicine
/ Mutation
/ Proteins
/ R
/ Real-Time Polymerase Chain Reaction
/ Vaccines
/ virology
/ viruses
