SubscribeAvian influenza is a viral infection. Protection against viruses, bacteria and other micro-organisms requires use of a particulate filter. The highest efficiency is provided by a P3 filter.
Current advice from DEFRA (UK) to protect against airborne transmission is to use either a disposable FFP3 respirator with exhalation valve or a re-useable respirator with P3 filter, plus close fitting eye protection.
If facial hair or other factors will prevent an efficient seal with these respirators use of a powered respirator with hood should be considered. Use of disposable overalls is recommended to protect personal clothing from contamination, along with wellington boots and surgical type rubber/vinyl gloves.
Contact with potential sufferers
Those concerned about contact with potential sufferers should use a half or full facemask with a P3 filter, or a powered respirator system (PAPR) using a hood or mask and a P3 filter. The hood or full facemask option will alleviate any difficulty in comfortably combining a half mask and goggles.
Carers
Carers are more likely to find a PAPR with Hood and P3 most suitable as powered equipment is significantly more comfortable to work in for periods over one hour, but the same choices apply. Eye protection, gloves and gown are again recommended.
For those involved with disease control and eradication activities, or working with birds and poultry, or having to handle or dispose of them, exactly the same applies as detailed above, but they may additionally be challenged by decaying organic matter (bird carcasses or bedding), which would require combination AP3 filtration, or high levels of ammonia from animal droppings, which would require KP3. Obviously, ABEKP3 would be suitable for both.
For further information, recommended actions and the latest advice refer to the World Health Organisation website, www.who.int and the DEFRA website, www.defra.gov.uk