Abstract

The identification and investigation of microbial pathogens are fundamental to the diagnosis, treatment, and control of infectious diseases. This paper provides a comprehensive overview of diagnostic approaches ranging from classical microscopy and culture-based techniques to advanced molecular and radiological methods. Traditional methods such as staining, microscopy, and biochemical testing remain essential for preliminary identification, while modern tools including PCR, genomic sequencing, immunoassays, and imaging techniques enhance accuracy and speed. Radiological investigations further support clinical diagnosis by revealing disease manifestations within the body. The integration of these approaches enables precise pathogen characterization, improved patient outcomes, and strengthened public health surveillance.