Advanced Diagnostic Technologies in Veterinary Practice

Veterinary diagnosis is moving rapidly from conventional laboratory testing toward integrated systems that combine molecular biology, digital imaging, automation, biosensors and data-driven decision support. Polymerase chain reaction (PCR), real-time PCR and emerging digital PCR methods can detect and quantify pathogen nucleic acids with high analytical sensitivity, while multiplex platforms allow several infectious agents to be examined from a single specimen. Isothermal amplification and portable point-of-care systems are bringing molecular testing closer to clinics, farms and outbreak sites where rapid decisions are essential. At the same time, automated haematology and biochemical analysers, improved immunoassays and biomarker panels are increasing the amount of clinically useful information obtained from small sample volumes. Next-generation sequencing and metagenomics can identify and characterise pathogens beyond routine targeted testing and are becoming important for outbreak investigation, microbial genomics and surveillance. Diagnostic imaging is also changing through digital radiography, ultrasonography, computed tomography and magnetic resonance imaging, with artificial intelligence increasingly used for image classification, segmentation and workflow support. Biosensors, microfluidic devices and connected monitoring systems may further shorten the interval between disease development, detection and clinical response. These technologies can improve animal welfare, treatment selection, antimicrobial stewardship and One Health surveillance, but their value depends on appropriate validation, sample quality, quality control and species-specific interpretation. This article discusses the major advanced diagnostic technologies influencing modern veterinary practice, their practical advantages and limitations, and the need to integrate new tools with clinical judgement rather than use them in isolation.