Laboratory diagnosis of viral infections purpose test for viral infection in the diagnostic laboratory virus infections can be confirmed by a multitude of methods diagnostic virology has changed rapidly due to the advent of molecular techniques and increased clinical sensitivity of serological assays. In this article we will discuss about the laboratory diagnosis of viral infection introduction the choice of materials and methods for laboratory confirmation of viral infection depends on the stage of illness table 131. Methods available for the laboratory diagnosis of viral respiratory infections are shown in table 3 specific diagnosis of viral respiratory infections is widely done for pediatric patients and is increasingly done for adult patients as well the most widely employed methods are viral culture and antigen detection by fa staining or eia. Different serological methods that can be used for viral infection diagnosis a rise in antibody titre to the virus can be used to diagnose viral infection a serum sample is obtained in the acute phase as soon as viral etiology is suspected and a second sample is obtained in the convalescent phase 10 14 days later. Ct scan of cases 02 07 and 13 showed typical viral pneumonia with ground glass opacity while no viral rnas were detected in first three or all the upper respiratory samples interpretation sputum is most accurate for laboratory diagnosis of ncp followed by nasal swabs
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