Can vaccinia virus be replaced by MVA virus for testing virucidal activity of chemical disinfectants?
نویسندگان
چکیده
BACKGROUND Vaccinia virus strain Lister Elstree (VACV) is a test virus in the DVV/RKI guidelines as representative of the stable enveloped viruses. Since the potential risk of laboratory-acquired infections with VACV persists and since the adverse effects of vaccination with VACV are described, the replacement of VACV by the modified vaccinia Ankara strain (MVA) was studied by testing the activity of different chemical biocides in three German laboratories. METHODS The inactivating properties of different chemical biocides (peracetic acid, aldehydes and alcohols) were tested in a quantitative suspension test according to the DVV/RKI guideline. All tests were performed with a protein load of 10% fetal calf serum with both viruses in parallel using different concentrations and contact times. Residual virus was determined by endpoint dilution method. RESULTS The chemical biocides exhibited similar virucidal activity against VACV and MVA. In three cases intra-laboratory differences were determined between VACV and MVA - 40% (v/v) ethanol and 30% (v/v) isopropanol are more active against MVA, whereas MVA seems more stable than VACV when testing with 0.05% glutardialdehyde. Test accuracy across the three participating laboratories was high. Remarkably inter-laboratory differences in the reduction factor were only observed in two cases. CONCLUSIONS Our data provide valuable information for the replacement of VACV by MVA for testing chemical biocides and disinfectants. Because MVA does not replicate in humans this would eliminate the potential risk of inadvertent inoculation with vaccinia virus and disease in non-vaccinated laboratory workers.
منابع مشابه
Substitutability of vaccinia virus by modified MVA virus for testing virucidal activity of chemical disinfectants: results of a national ring trial
متن کامل
Does limited virucidal activity of biocides include duck hepatitis B virucidal action?
BACKGROUND There is agreement that the infectivity assay with the duck hepatitis B virus (DHBV) is a suitable surrogate test to validate disinfectants for hepatitis B virucidal activity. However, since this test is not widely used, information is necessary whether disinfectants with limited virucidal activity also inactivate DHBV. In general, disinfectants with limited virucidal activity are us...
متن کاملDoes “limited virucidal activity” of biocides include hepatitis B virucidal action?
Background: There is agreement that the infectivity assay with the duck hepatitis B virus (DHBV) is a suitable surrogate test to validate disinfectants for hepatitis B virucidal activity. However, since this test is not widely used, information is necessary whether disinfectants with limited virucidal activity also inactivate DHBV. In general, disinfectants with limited virucidal activity are u...
متن کاملPovidone-iodine hand wash and hand rub products demonstrated excellent in vitro virucidal efficacy against Ebola virus and modified vaccinia virus Ankara, the new European test virus for enveloped viruses
BACKGROUND The recent Ebola virus (EBOV) epidemic highlights the need for efficacious virucidal products to help prevent infection and limit the spread of Ebola virus disease. However, there is limited data on the efficacy of virucidal products against EBOV, because the virus has a high biosafety level and is only available in a few laboratories worldwide. The virucidal efficacy of antiseptics ...
متن کاملTesting virucidal activity in Germany: an update
Several chemical disinfectants have been tested in a quantitative suspension test for virucidal activity as per the test method devised by the German Society for Control of Viral Diseases (DVV) and the former German Federal Health Office (BGA, now the Robert Koch-Institute, RKI) drafted in 1982. The introduction of the term "limited virucidal activity" (effective against enveloped viruses) in a...
متن کامل