Validation and operational application of a rapid method for rabies antigen detection

Area of Science:

• Veterinary diagnostics
• Infectious disease surveillance
• Immunohistochemistry

Background:

• Rabies surveillance is critical for public and animal health, especially in regions with limited diagnostic infrastructure.
• The Centers for Disease Control and Prevention (CDC) developed a direct, rapid immunohistochemical test (DRIT) for rabies virus antigen detection.
• US military veterinary units operate globally, often in areas requiring enhanced diagnostic support.

Purpose of the Study:

• To deploy and evaluate the CDC's DRIT in Iraq and Afghanistan for rabies surveillance.
• To establish rabies diagnostic capabilities in countries with limited historical data and current infrastructure.
• To train military and civilian veterinarians on the operation and application of the DRIT.

Main Methods:

• The DRIT was deployed to US military veterinary units in Iraq and Afghanistan.
• Veterinary Corps officers and technicians received training on the DRIT.
• Field testing of collected brainstem samples using DRIT was conducted and compared against direct fluorescent antibody testing at Veterinary Laboratory Europe (VLE) and the CDC.

Main Results:

• The DRIT successfully detected rabies virus antigen in brainstem samples from various animal species.
• Field testing demonstrated 100% agreement between the DRIT and the traditional laboratory standard (direct fluorescent antibody testing).
• Training programs were successfully implemented for military and civilian veterinary personnel.

Conclusions:

• The DRIT is a reliable and effective tool for rabies surveillance in resource-limited settings.
• Deployment of the DRIT enhanced diagnostic capabilities and facilitated crucial surveillance in Iraq and Afghanistan.
• The successful training program supports sustainable rabies diagnostics in the region.