According to the Health Protection Agency (HPA) in Britain one of the workers who had been dealing with the bird flu outbreak in Suffolk in England has been admitted to hospital.
The young man, said to be a vet, is apparently suffering a mild respiratory illness and is undergoing tests, one of which would be for the H5N1 strain of avian flu.
He is at a Nottingham hospital and is being kept in isolation.
The HPA says it is highly unlikely the worker has been exposed to H5N1 because of the strict precautionary measures undertaken and the worker had not been pre-exposed and was wearing full protective clothing.
Since the outbreak of the H5N1 strain last week which killed 2,500 birds on the farm; another 159,000 turkeys have been slaughtered.
Authorities insist there is little risk to the public health or to the poultry industry but nevertheless experts remain baffled as to the cause of the outbreak.
The huge commercial poultry farm in Holton owned by Bernard Matthews is around about 130 miles northeast of London; the company is Europe's biggest turkey producer; a number of countries, including Japan, Russia, Hong Kong, South Africa, South Korea have already banned British poultry imports.
The European commission (EU) has said export bans on British poultry following the outbreak are "totally disproportionate" as bird flu contingency plans set up by the EU which require the isolation of the infected area and the provision of a buffer zone to contain any spread of the disease, had been carried out.
The EU says only a localised trade restriction on poultry from the affected area could be justified.
An EU spokesman says the measures were established in order to avoid the need for a general trade ban on poultry against the EU member state concerned.