Spinal cord tissue detection in comminuted beef: comparison of two immunological methods

Area of Science:

• Food safety testing
• Immunological assays
• Veterinary diagnostics

Background:

• Central nervous system (CNS) tissue in beef poses a potential risk.
• Accurate detection methods are crucial for food safety regulations.
• Commercial kits offer standardized approaches for CNS tissue identification.

Purpose of the Study:

• To compare the sensitivity and specificity of two commercial immunological kits for detecting CNS tissue (spinal cord) in beef.
• To evaluate the performance of ScheBo® Brainostic™ and Ridascreen® Risk Material 10/5 test.
• To determine the influence of meat quality grade on detection efficacy.

Main Methods:

• Two kits, ScheBo® Brainostic™ (neuron-specific enolase) and Ridascreen® (glial fibrillary acidic protein), were used.
• Spinal cord (SC) was added to ground beef at varying concentrations (0.0% to 1.6%).
• Detection sensitivity and specificity were assessed in fresh and frozen beef samples.

Main Results:

• Both kits detected SC at their claimed levels (0.25% for Brainostic™, 0.11% for Ridascreen®).
• Ridascreen® consistently detected SC at 0.025%, exceeding its claimed sensitivity.
• Ridascreen® was approximately 10 times more sensitive, faster, easier, and less expensive than Brainostic™.

Conclusions:

• The Ridascreen® test is a highly sensitive and cost-effective method for detecting CNS tissue in beef.
• Meat quality grade did not impact the detection of spinal cord in either fresh or frozen samples.
• Ridascreen® offers a practical solution for ensuring food safety regarding CNS contamination in beef products.