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Table 1 Data on farm reporting congenital disorders in four Swiss sheep breeds during a 10-year-period (2002–2012)

From: Occurrence of congenital disorders in Swiss sheep

   SWA BHM SBS VBS Total z2P*
Arthrogryposis No. of farm reports 43 14 13 6 76 0.12
  Total no. of farms 380 200 148 119 847  
  Prevalence (%) 11.3 7 8.8 5 9  
Atresia ani No. of farm reports 42 11 7 5 65 0.01
  Total no. of farms 380 199 148 119 846  
  Prevalence (%) 11.1 5.5 4.7 4.2 7.7  
Brachygnathia No. of farm reports 131 34 66 19 250 <0.001
inferior Total no. of farms 381 199 148 119 847  
  Prevalence (%) 34.4 17.1 44.6 16 29.5  
Cleft palate No. of farm reports 8 1 4 1 14 0.31
  Total no. of farms 381 199 148 119 847  
  Prevalence (%) 2.1 0.5 2.7 0.8 1.7  
Cryptorchidism No. of farm reports 46 23 17 3 89 0.02
  Total no. of farms 379 199 147 119 844  
  Prevalence (%) 12.1 11.6 11.6 2.5 10.5  
Entropion No. of farm reports 202 74 10 3 289 <0.001
  Total no. of farms 385 203 150 123 861  
  Prevalence (%) 52.5 36.5 6.7 2.4 33.6  
Umbilical/ No. of farm reports 75 30 22 7 134 0.004
abdominal hernia Total no. of farms 380 198 148 119 845  
  Prevalence (%) 19.7 15.2 14.9 5.9 15.9  
Scrotal/inguinal No. of farm reports 22 4 4 28 58 <0.001
hernia Total no. of farms 380 198 147 119 844  
  Prevalence (%) 5.8 2.0 2.7 23.5 6.9  
Hydrocephalus No. of farm reports 22 4 3 1 30 0.015
  Total no. of farms 379 200 146 119 844  
  Prevalence (%) 5.8 2 2.1 0.8 3.6  
Microphthalmia No. of farm reports 5 3 1 0 9 0.56
  Total no. of farms 381 199 147 119 846  
  Prevalence (%) 1.3 1.5 0.7 0 1.1  
Torticollis No. of farm reports 48 24 9 8 89 0.07
  Total no. of farms 381 198 147 119 845  
  Prevalence (%) 12.6 12.1 6.1 6.7 10.5  
  1. (SWA Swiss White Alpine sheep; BHM Brown Headed Meat sheep; SBS Swiss Black Brown Mountain sheep; VBS Valais Blacknose sheep).
  2. *overall P-value between breeds.