# Development of a detection chip for major pathogenic drug-resistant genes and drug targets in bovine respiratory system diseases

## TL;DR

A new detection chip was developed to rapidly identify drug-resistant genes in bovine respiratory disease pathogens, improving treatment decisions.

## Contribution

A TaqMan MGB probe detection chip was developed for rapid detection of BRD pathogens and drug-resistant mutations.

## Key findings

- The detection chip uses 94 specific probes and primers to identify BRD pathogens and drug-resistant genes in under 1 hour.
- The chip successfully detected mutations in the quinolone resistance-determining region associated with fluoroquinolone resistance.
- The chip demonstrated high specificity, sensitivity, and repeatability for clinical sample testing.

## Abstract

Bovine respiratory disease (BRD) is a significant veterinary challenge, often exacerbated by pathogen resistance, hindering effective treatment. Traditional testing methods for primary pathogens – Mycoplasma bovis, Pasteurella multocida, and Mannheimia haemolytica – are notably time-consuming and lack the rapidity required for effective clinical decision-making. This study introduces a TaqMan MGB probe detection chip, utilizing fluorescent quantitative PCR, targeting key BRD pathogens and associated drug-resistant genes and sites. We developed 94 specific probes and primers, embedded into a detection chip, demonstrating notable specificity, repeatability, and sensitivity, reducing testing time to under 1 h. Additionally, we formulated probes to detect mutations in the quinolone resistance-determining region, associated with fluoroquinolone resistance in BRD pathogens. The chip exhibited robust sensitivity and specificity, enabling rapid detection of drug-resistant mutations in clinical samples. This methodology significantly expedites the diagnostic process for BRD and sensitive drug screening, presenting a practical advancement in the field.