Skip to main content

Table 1 Prevalence, mean egg counts and results of larval differentiation for cattle naturally infected with gastrointestinal helminth from five different study areas in South Darfur State, Sudan, during the rainy season

From: Susceptible trichostrongyloid species mask presence of benzimidazole-resistant Haemonchus contortus in cattle

  All animals Sex Age Study area
  Male Female Young Adult Beleil Kass Nyala Rehed Al-Birdi Tulus
Prevalence of the infection           
 No. of the tested cattle 443 125 318 234 209 96 63 130 62 92
 No. (%) of the infected cattle 314 (71) 96 (77) 218 (69) 201 (86) 113 (54) 77 (80) 31 (49) 103 (79) 48 (77) 55 (60)
  No. (%) of strongyles 314 (71) 96 (77) 218 (69) 201 (86) 113 (54) 77 (80) 31 (49) 103 (79) 48 (77) 55 (60)
    No. (%) of cattle shedding both strongyles + Strongyloides spp. eggs 8 (2) 5 (4) 3 (1) 7 (3) 1 (0.5) 0 (0) 0 (0) 0 (0) 3 (5) 5 (5)
  Cattle shedding ≥ 150 strongyle epg 160 (36) 56 (45) 104 (33) 133 (57) 27 (13) 28 (29) 18 (29) 44 (34) 37 (60) 33 (36)
Egg count/gram of positive faeces (range)           
 Strongyles 338 (10–4320) 551 (20–4320) 244 (10–2860) 458 (20–4320) 123 (10–3200) 147 (20–820) 167 (10–500) 223 (20–1340) 836 (20–4320) 480 (10–3200)
Relative strongyles species composition (%) for  coproculturesa, b           
 Haemonchus spp. 86      90 77 80 90 92
 Trichostrongylus spp. 10      10 15 15 5 5
 Oesophagostomum/Chabertia spp. 4      0 8 5 5 3
  1. aSamples pooled on a regional level. In each study area and on the day of sample collection, faecal samples pooled and cultured only from cattle shedding strongyle eggs. Third-stage larvae were harvested, strongyle larvae differentiated microscopically and then the mean of different days calculated
  2. bThe number of pools were two up to four from each study area