Experimental infection of horses with Hendra virus/Australia/horse/2008/Redlands.

The research article focuses on understanding the transmission and spread of the Hendra virus (HeV) in horses, a potentially lethal virus harbored by Australian flying foxes. The study managed to establish HeV disease in three horses, contributing to the understanding of the virus’ mechanism of spreading and suggesting critical factors for reducing human exposure risk.

Introduction to Hendra Virus

• The Hendra virus (HeV) is a high-risk pathogen which is naturally carried by Australian flying foxes and is occasionally passed directly on to horses.
• The virus can be deadly to both horses and humans, making it a zoonotic paramyxovirus.
• The specific manner of transmission from the flying foxes to horses, as well as the potential for further spreading of the virus from infected horses to other horses or humans, is not well understood and is an area of active research.

Research Experiment Setup and Findings

• In this study, researchers were able to successfully induce systemic HeV disease in three horses by exposing them to Hendra virus/Australia/Horse/2008/Redlands through the oronasal route. This demonstrates a possible natural infection route.
• In two of the three horses, HeV RNA was detected continuously in nasal swabs as early as two days following exposure.
• This suggests that the systemic spread of the virus in the host body might be preceded by local viral replication in the nasal cavity or the nasopharynx.

Implications on HeV Diagnosis and Control

• The study indicates that an important strategy to minimize the risk of humans being exposed to HeV is to consider the possibility of HeV infection at an early stage when diagnosing horses.
• Appropriate infection control measures should also be implemented as soon as HeV is suspected.