Pediatric tuberculosis detection using trained African giant pouched rats.

Area of Science:

• Medical Diagnostics
• Veterinary Science
• Infectious Diseases

Background:

• Pediatric tuberculosis (TB) diagnosis remains a significant challenge, particularly in high-burden countries.
• Current diagnostic methods result in up to 94% of children with TB being treated empirically.
• There is a critical need for innovative and effective diagnostic tests for childhood TB.

Purpose of the Study:

• To evaluate the diagnostic performance of trained rats for pediatric TB.
• To determine if trained rats can enhance the detection rate of TB in children compared to standard diagnostic approaches.

Main Methods:

• Sputum samples from presumptive TB patients in Tanzanian clinics were analyzed.
• Samples identified as TB-positive by rats were confirmed using concentrated smear microscopy.
• The yield of bacteriologically confirmed pediatric TB cases detected by rats was compared to the standard of care.

Main Results:

• Rats detected an additional 23 children with TB among those aged 1-5 years, increasing detection by 67.6%.
• Across children aged 1-14 years, rats identified 208 additional TB cases missed by standard methods.
• The relative increase in TB detection by rats decreased with increasing age.

Conclusions:

• Trained rats demonstrate significant potential to improve pediatric TB detection rates.
• This novel approach could help overcome existing challenges in diagnosing TB in children.
• Further studies are required to assess the accuracy of rats using diverse sample types.