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Table 1 Risk factors for small-scale farms for ASF reports between first and second sampling (n = 179), 2010–2011

From: A longitudinal survey of African swine fever in Uganda reveals high apparent disease incidence rates in domestic pigs, but absence of detectable persistent virus infections in blood and serum

   a ASF between
Risk factor   Nob (%) Yesb (%) NAb (%) Total (n)
Awareness c Not aware about ASF 67 0 33 3
  Aware about ASF 69 5 26 170
  NA d 33 0 67 6
Biosecurity measures e At least one 70 3 28 40
  None 68 6 27 127
  NA 67 0 33 12
Borrow boar No 59 0 41 27
  Yes 70 5 25 136
  NA 69 8 23 13
Breed Local 67 4 28 67
  Improved 69 5 26 111
  NA 0 0 100 1
Duration of enterprises      
  Less or equal to 10 years 67 3 30 112
  Greater than 10 years 74 6 20 50
  NA 63 13 25 16
Ectoparasites control No 74 0 26 27
  Yes 68 5 28 145
  NA 57 14 29 7
Feeding swill No 72 9 19 47
  Yes 68 3 29 130
  NA 0 0 100 2
Labour Family 69 4 26 160
  Hired 69 6 25 16
  NA 0 0 100 3
Pets present on farm No 67 5 28 111
  Yes 68 4 28 57
  NA 82 0 18 11
Piglets housing Piglets housing present 69 5 25 91
  Piglets not housed 71 2 27 83
  NA 0 20 80 5
Pigs housing Pig housing present 66 5 29 111
  No pig housing 75 0 25 64
  NA 25 50 25 4
Replacement stock Own farm 73 5 23 66
  From neighbouring farms 67 4 29 106
  NA 43 14 43 7
Wild pigs (bush pigs) contact No 72 5 22 98
  Yes 56 11 33 9
  NA 64 3 33 72
  1. a ASF between- Reports of ASF on farms during the one year between the first and second sampling visits. This is the dependent variable and the row variables in the table are the independent variables
  2. b The numbers in each of the cells under columns No, Yes and NA are relative proportions (percentages) of the total number of pigs (column Total, n) in each of the table rows
  3. c Awareness encompasses those farms where farmers expressed having knowledge on the symptoms, spread, control and prevention measures for ASF
  4. d Missing values
  5. e Biosecurity measures considered were presence of a fence to the farm, controlled entrance to the pig pens (presence of gate/door) and presence of foot baths