KEPHIS Virology laboratory has capacity to analyze numerous plant viruses. This is achieved through different approaches which include Enzyme Linked Immunosorbent Assays (NCM, DAS-ELISA, TAS-ELISA and Immuno strips kits), mechanical inoculation, grafting, grow-out tests and molecular techniques. The laboratory is ISO/IEC 17025:2017 accredited and supports clean germplasm exchange and distribution where high value crops undergo virus indexing in the laboratory to test for various viruses. The plant materials found to be free are recommended for further multiplication and distribution. Materials that are found to be infected with viruses are taken to Tissue culture laboratory where they undergo virus clean up using thermotherapy, chemotherapy and meristem tip culture.