Swine vesicular disease + avian influenza

Question 1

confirmation of presence of disease of SVD

Answer 1

• Virus isolation from the pigs or from the environment
• Seropositive pigs + characteristic lesions
• Clinical signs + direct epidemiological connection with a confirmed outbreak
• Only seropositive pigs: resampling and retesting with an interval of 28 days
• If no evidence of the disease, but the pigs are still seropositive:
o Killed and destroyed or
o Slaughtered separately and the meat is exclusively used on the national market

Question 2

Restocking of infected holdings in SVD

Answer 2

• Four weeks after completion of the first full disinfection of the premises
• Outdoor pig holdings:
o Negative sentinel piglets: examined clinically and sampled for serological testing after 28
days
o Full restocking
• Other forms of rearing:
o Within a period of eight days
o Seronegative pigs
o No pig may leave the holding for a period of 60 days after the arrival of the last pigs,
o Clinical and serological examination: 28 days after the arrival of the last pigs

Question 3

definition of DIVA in avian influenza!!!!!!

Answer 3

• A vaccination strategy which enables to differentiate between vaccinated/infected and
vaccinated/non-infected animals through the application of a diagnostic test designed to
detect Abs against the field virus & the use of non-vaccinated sentinel birds

Question 4

Highly pathogenic avian influenza (HPAI):

Answer 4

• an infection of poultry or other captive birds caused by:
o Avian influenza viruses of the subtypes H5 or H7 with genome sequences codifying the
multiple basic AA at the cleavage site of the haemagglutinin molecule similar to that
observed for other HPAI viruses, indicating that the haemagglutinin molecule can be
cleaved by a host ubiquitous protease; or
• Avian influenza viruses with an IV pathogenicity index in 6 week old chickens greater than 1.2

Question 5

Measures to be applied on holdings where HPAI outbreaks are confirmed

Answer 5

All poultry and other captive birds on the holding shall be killed
All carcases and eggs on the holding shall be disposed
All substances and waste likely to be contaminated, such as feed, shall be destroyed
Meat of poultry slaughtered and eggs collected from the holding during the period between
the probable date of introduction of HPAI on the holding and the application of the measures
of stamping out shall, wherever possible, be traced and dispose

Question 5

Measures to be applied on holdings where HPAI outbreaks are confirmed

Answer 5

All poultry and other captive birds on the holding shall be killed
All carcases and eggs on the holding shall be disposed
All substances and waste likely to be contaminated, such as feed, shall be destroyed
Meat of poultry slaughtered and eggs collected from the holding during the period between
the probable date of introduction of HPAI on the holding and the application of the measures
of stamping out shall, wherever possible, be traced and dispose