Borna disease virus 1 infection in alpacas: Comparison of pathological lesions and viral distribution to other dead-end hosts.

The research article explores the impact of Borna disease virus 1 (BoDV-1), a zoonotic virus causing a progressive neurological disease, on alpacas compared to other dead-end hosts like horses.

Research Objectives

• The study aims to provide a detailed understanding of the pathological lesions and viral distribution in alpacas affected by BoDV-1.
• The researchers studied the severity and distribution of inflammatory lesions in naturally afflicted alpacas and compared them to known spillover hosts like horses.

Methodology

• The study was administered on 6 alpacas and 8 horses naturally affected by the disease.
• The tissue and cellular distribution of BoDV-1 were determined through immunohistochemistry and immunofluorescence techniques.

Findings

• All animals, both alpacas and horses, were diagnosed with lymphocytic meningoencephalitis, an inflammatory disease affecting the brain and meninges.
• Animals with a shorter disease duration had more prominent lesions in the cerebrum and at the pituitary gland’s transition (from the nervous to glandular part) compared to animals that had been living with the disease for a longer period.
• The viral antigen was almost entirely found within the cells of the central and peripheral nervous systems. An exception was the virus-infected glandular cells of the pituitary gland.
• Alpacas, like horses and other spillover hosts, are considered dead-end hosts for BoDV-1, meaning the virus can’t be transmitted to other hosts after infection.

Implication

• The findings have significant implications in understanding the disease progression and cellular distribution of BoDV-1 in alpacas and comparing it with other dead-end hosts. This information could be crucial in designing effective zoonotic disease control strategies.