PCR is primer directed enzymatic amplification of spe-cific target DNA sequences. It has become an important part of modern diagnostic methods and for basic research. When used with proper caution and appropriate controls, PCR can provide invaluable help in rapid identification of specific pathogens which are difficult to grow. PCR has been applied for detection of several viruses. Cur-rently, the standard method for diagnosing the presence of viral pathogens in clinical samples relies on culture and other techniques which are time consuming and cumbersome. However, active research is under way using new molecular methods to curtail detection time and increase assay sensitivity. PCR has emerged as the molecular method of choice in achieving these objectives. A PCR-based method cannot be given diagnostic status, until it includes methods to determine minimum detec-tion limit, positive control, negative control and a reagent control (blank). The minimum detection limit and thereby the diagnostic sensitivity of a PCR assay, par-ticularly on sub clinical samples with low target patho-gens, depends on an effective sample treatment proce-dure. Thus by estimating minimum detection limit of a diagnostic PCR one can diagnose a disease condition where infection is in subclinical phase and sample vol-ume is less. In this study we standardized a PCR using reported primers to detect CPV infection. PCR showed good concordance with virus isolation “gold standard” for diagnostic virology, demonstrates specificity and sensitivity of this method.