lecture 15

Question 1

What are the wildlife reservoir for African swine fever

Answer 1

wildlife reservoir for African swine fever; all members of the pig
wild pigs are asymptomatic
domestic pigs will become infected and get sick
different species have different levels of susceptibility

Question 2

List the ways of transmission of African swine fever

Answer 2

transmission of African swine fever
-direct contact with infect pig (oronasal and all secretions)
-environment contamination with products
-ingestion of infected pork products (carcasses, fed to pigs eg.swill)
-ornithodoros soft ticks (infected for life, colonies maintain virus)
very resistant in the environment

Question 3

Discuss African swine fever in pigs

Answer 3

African swine fever in pigs
3 categories; highly virulent isolates, moderately virulent isolates and low-virulence isolates.
disease ranges from peracute, subacute to chronic.
clinical signs are dependent on physiological status of animal like age and breed etc.

Question 4

List the clinical signs for the parachute/acute form

Answer 4

clinical signs for the parachute/acute form

• sudden death may be first sign of infection
• diarrhea initially mucoid to bloody
• vomiting
• constipation
• abdominal pain

Question 5

List the clinical signs for the subacute form

Answer 5

clinical signs for the subacute form 
less several clinical signs than the acute form 
-fever 
-thrombocytopenia
-leukopenia 
-hemorrhages 
abortions are the first sign

Question 6

List the clinical signs for the chronic

Answer 6

clinical signs for the chronic

• coughing
• ulcers and reddened pr raised necrotic skin
• can be fatal

Question 7

Lis the methods fo diagnosis and control of Africa swine fever

Answer 7

diagnosis and control of Africa swine fever
no vaccines present
no treatment
test and slaughter is the best option
-detection is via the ab by ELISA (chronic form) or genome or ag detection via PCR (other forms)

Question 8

Discuss the characteristics of Nimaviridae

Answer 8

characteristics of Nimaviridae
looks like a bullet
genome is circular
dsDNA