2. Recovery programs in infectious diseases in swine Flashcards
Classical swine fever/ African swine fever:
CSF - pestivirus, flaviviridae
ASF - asfavirus, arboviruses (transmission through arthropods - ornithodoros)
Affinity to endothelial cells, tonsils, oedema, outer membranes of organs
Haemorrhages, marbled lymph nodes, splenomegaly
Acute, peracute and chronic, congenital
Abortion or latency (persistency in piglets)
CSF:
north america and europe
early detection, movement control, slaughter and proper disposal
cleaning and disinfection in endemic areas
vaccination to prevent spread
ASF:
no vaccine
strict import, important in endemic areas
difficult to eliminate reservoirs (warthog) - tick control!
rapid diagnosis, slaughter, disposal, disinfection, surveillance
Aujeszky’s disease:
Herpes virus 1
Latency in spinal ganglia, affected by age
In endemic areas: test breeding animals, isolation and sanitation
Marker vaccines available
Latency detection required:
- test and removal
- offspring segregation
- depopulation
Porcine respiratory and reproductive syndrome (PRRS):
'’blue ear’’ disease of pigs
Arterivirus
Vaccinations are very effective
Acclimatization and isolation for 45-60 days prior to introduction to herd
In outbreak: depopulation, disposal, cleaning and disinfection
Swine influenza:
Orthomyxoviridae - Influenza A or C
H1N1, H1N2, H3N2
Good nutrition and hygiene
Don’t mix healthy and sick animals
Brucellosis:
Brucella suis
Placentitis and abortion in females; epididymitis and orchitis in males
Elimination method - all positive and seropositive animals are excluded from breeding programme
Radical method - all slaughtered at outbreak
Decontamination of area
Vaccines in endemic area - live or attenuated
Swine vesicular disease:
Enterovirus, Picornaviridae
Notifiable disease
Screening of imported pigs, important restrictions
Feeding restrictions e.g. garbage
Routine surveillance and radical methods in endemic areas
Cleaning and disinfection
