![]() Who gets WNV?Īnyone who lives in or travels to areas where West Nile virus activity has been identified is at risk of getting the disease. In humans, WNV may cause a mild illness but may also cause encephalitis (inflammation of the brain) or meningitis (inflammation of the lining of the brain and spinal cord). The infected mosquitoes can then spread the virus to humans and other animals. Mosquitoes become infected when they feed on infected birds. ![]() West Nile Virus (WNV) Disease is spread by the bite of a mosquito infected with the virus. West Nile Virus (WNV) What is West Nile virus? All Health Care Professionals & Patient Safety.Clinical Guidelines, Standards & Quality of Care.Health & Safety in the Home, Workplace & Outdoors.Birth, Death, Marriage & Divorce Records.Please do not contact this web site for personal medical queries, as we are not in a position to provide individual answers. If you wish to obtain more information regarding a personal medical issue please contact your National Help Line. To increase the deferral of donors following infection with West Nile Virus or symptoms suggestive of West Nile Virus Infection to six months and to remove the requirement for a negative NAT test for these donors prior to donation. These are provided in the 'Geographical Disease Risk Index'.Ī 'Position Statement on West Nile Virus (WNV)' is available in the 'Document Library' of 'Reason for change It is spread by mosquitoes and so is more prevalent at times of the year when mosquitoes are active.Īs the problem can vary both in relation to geography and time of the year it is not possible to state areas from which donors need to be deferred and dates of disease activity. There it has caused illness and death post transfusion and post transplantation of tissues and organs. It is geographically widespread, including areas in Europe and other parts of the world not affected by Malaria, and it has reached epidemic proportions in North America in recent years. This may range from no or minimal symptoms to death. West Nile Virus is a flavivirus, similar to Dengue, which causes a wide spectrum of infection. For donors who have been back in the UK for less than four weeks, who have not been diagnosed with WNV infection and who have not had symptoms suggestive of WNV infection, if a validated NAT for WNV is to be undertaken on the donated component(s), accept.Ģ) Donors who have been back in the UK for less than six months, who have had symptoms suggestive of WNV infection while abroad or within 28 days of return, (but no firm diagnosis of WVN infection) if a validated NAT for WNV is to be undertaken on the donated component(s), accept. This may be reduced to four weeks if they have had neither symptoms nor evidence of infection. These are shown in the 'Geographical Disease Risk Index' (GDRI).Ī) It is less than six months from a donor's return from a WNV endemic area and the donor has been diagnosed with WNV whilst there or following their return.ī) It is less than six months from a donor's return from a WNV endemic area and the donor has either had a history of symptoms suggestive of WNV whilst there or within 28 days of their return.Ĭ) In other cases it is less than four weeks from a donor's return from a WNV endemic area.ġ) All donors may be accepted six months after their return from an affected area. Annex 6: Advanced Therapy Medicinal Products (ATMPs).Annex 5: Blood Components for Contingency Use.Annex 2: ISBT 128 check character calculation.Annex 1: Standards available from NIBSC.27: Specification for labelling consumables used in therapeutic product production.26: Specification for blood pack base labels.25: Standards for electronic data interchange within the UK Blood Transfusion Services.24: Specification for the uniform labelling of human tissue products using ISBT 128.23: Specification for the uniform labelling of blood, blood components and blood donor samples.21: Tissue banking: tissue retrieval and processing.20: Tissue banking: selection of donors.15: Molecular typing for red cell antigens.14: Guidelines for the use of DNA/PCR techniques in Blood Establishments.13: Patient testing (red cell immunohaematology).12: Donation testing (red cell immunohaematology). ![]()
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