MIDTERM 4 - Additional questions Flashcards
Repopulation/Restocking after African swine fever outbreak
When the occurrence of the disease is linked to vectors, restocking cannot take place for at least 6 years unless..
1. Specific operations to eliminate the vector from the premises and places where the pigs are to be kept or can come into contact with the vector have been successfully carried out under official supervision
OR
2. It can be shown that the persistence of the vector is no longer a significant risk of
transmitting ASF
3. Minimum 40 days after cleaning, disinfection and disinsectisation where necessary
Measures in the Protection zone of African swine fever
1. Radius at least 3 km radius around the holding for at least 15 days and this restriction may only be lifted after a serological survey
2. A census on all holdings in the restricted zones
3. A ban on of any movement and transport of pigs in the restricted zones
4. Movement restrictions on products, persons and vehicles in restricted zones
5. No markets or fairs, etc, are permitted
6. All holdings must undergo a strict clean, disinfection and disinsectisation
Measures in the Surveillance zone of African swine fever
1. Radius for at least 10 km around the holding for at least 30 days and this restriction may only be lifted after a serological survey
2. A census on all holdings in the restricted zones
3. A ban on of any movement and transport of pigs in the restricted zones
4. Movement restrictions on products, persons and vehicles in restricted zones
5. No markets or fairs, etc, are permitted
6. All holdings must undergo a strict clean, disinfection and disinsectisation
Repopulation/Restocking after infection of classical swine fever
1. Minimum 30 days after completion of cleaning and disinfection of the holdings
2. Open air holdings: can only fully repopulate if none of the sentinel pigs (pigs used for repetitive serological testing) have developed antibodies
3. Should test at 40 days
Protection Zone classical swine fever
1. Radius of at least 3 km around the holding, for at least 15 days and this restriction may only be lifted after a serlogical survey
2. A census on all holdings in the restricted zones
3. Prohibition of any movement and transport of pigs in the restricted zones
4. All holdings must undergo a cleaning and disinfection
AND
5.The removal of pigs from a holding in the restricted zones is subject to authorisation only by the veterinary authority
Surveillance Zone classical swine fever
1. Radius for at least 10 km around the holding for at least 30 days and this restriction may only be lifted after a serological survey
2. A census on all holdings in the restricted zones
3. Prohibition of any movement and transport of pigs in the restricted zones
4. All holdings must undergo a cleaning and disinfection
AND
5.The removal of pigs from a holding in the restricted zones is subject to authorisation only by the veterinary authority
Control/Regular testing of Aujeszky’s free status in large-scale holdings
1. Boars: All every 6 months
2. Sows: 20-50% of sows every 6 months
3. Representative sampling of fattening animals every 6 months
XXX
Vaccination of Aujeszky’s in free, large-scale pig holding
1. no infection for 2 years (until 2006)
2. only gE gene-deleted vaccine
3. epidemiological conditions (e.g. isolation, controlled movements, laboratory examinations, records)
4. Testing of all breeding sows and boars and representative sample of fattening pigs with gEELISA
5. insemination or natural breeding with negative semen/boars
Official measures in the protection zone in case of newcastle disease
1. Protection zone = At least 3 km radius around the holding for 21 days
2. Standstill measures and movement restrictions
3. Restrictions can only be lifted after the sampling of all the poultry holdings has taken place in the restricted zones
4. Strict disinfection involving preliminary and final cleaning and disinfection steps
5. Prophylactic and emergency vaccinations are permitted
Official measures in the surveillance zone in case of newcastle disease
1. Surveillance zone = At least 10 km radius around the holding for 30 days
2. Standstill measures and movement restrictions
3. Restrictions can only be lifted after the sampling of all the poultry holdings has taken place in both zones
4. Strict disinfection involving preliminary and final cleaning and disinfection steps
5. Prophylactic and emergency vaccinations are permitted
Definition of DIVA with avian influenza
1. A vaccination strategy sused to differentiate the infected animals from vaccinated animals
2. a vaccination strategy which enables a differentiation to be made between vaccinated/infected and vaccinated/noninfected animals through the application of a diagnostic test designed to detect antibodies against the field virus and the use of nonvaccinated sentinel birds
Preventative measures in Duck Viral Enteritis
1. Not keeping on natural waters for 2 weeks before laying
2. Infected waters: no susceptible animals for 2 years except for vaccinated broilers
3. Keep breeding and broiler ducks separated
Official measures of teschovirus in a small-scale holding
1. All diseased and suspected of being diseased pigs: killed on the spot
2. Suspected of being contaminated: slaughtered separately and heat treatment
Official measures in protection zone of bluetongue
1. Radius of at least 100 km around the infected holding
2. ID of all holdings
3. Monitoring of sentinel groups of bovine
4. Ban on leaving
5. May be decided: identification and vaccination
6. No vaccination
7. Persons in the potection zone should be informed of the measures
Official measures in surveillance zone of bluetongue
1. Radius of at least 50 km extending beyond the limits of the protection zone
2. ID of all holdings
3. Monitoring of sentinel groups of bovine
4. Ban on leaving
5. May be decided: identification and vaccination
6. No vaccination
7. Persons in the potection zone should be informed of the measures
