Dicrocoelium spp. in cattle from Wa, Ghana: prevalence and phylogeny based on 28S rRNA

Parasitol Res. 2021 Apr;120(4):1499-1504. doi: 10.1007/s00436-021-07085-z. Epub 2021 Feb 17.

Abstract

Dicrocoeliosis is a trematode infection in cattle, sheep and goats caused by the small liver fluke, Dicrocoelium spp. Though endemic in Ghana, its disease situation is poorly understood. In the present study, the prevalence, distribution and worm load of Dicrocoelium spp. in cattle at slaughter in Wa were determined. A total of 389 cattle were screened during meat inspection for liver flukes, and polymerase chain reaction accompanied by DNA sequencing of the 28S rRNA gene was used to identify Dicrocoelium spp. Generally, prevalence of bovine dicrocoeliosis (small liver fluke) stood at 19.54 % with prevalence in males and females being 17.62 % and 21.43 %, respectively. Animals under 2 years suffered more infection than older ones (23.08 % vs. 16.80 %). Dicrocoelium infection was recorded in animals from all the communities where slaughtered cattle came from. On average, 31 flukes per infected animal were recorded. A molecular confirmatory test on seven flukes identified them as D. hospes. This preliminary study highlights the importance of bovine dicrocoeliosis in Ghana and has identified D. hospes as a causal agent. The data provides basis for further studies to appraise the trematode disease situation in animals and phylogeny of Dicrocoelium spp. circulating in Ghana.

Keywords: Cattle; Dicrocoeliosis; Dicrocoelium hospes; Ghana; Wa.

MeSH terms

  • Animals
  • Cattle
  • Cattle Diseases / epidemiology*
  • Cattle Diseases / parasitology
  • Dicrocoeliasis / epidemiology
  • Dicrocoeliasis / parasitology
  • Dicrocoeliasis / veterinary*
  • Dicrocoelium / anatomy & histology
  • Dicrocoelium / classification
  • Dicrocoelium / genetics*
  • Female
  • Food Inspection
  • Ghana / epidemiology
  • Goat Diseases / epidemiology
  • Goat Diseases / parasitology
  • Goats
  • Male
  • Meat / parasitology
  • Meat / standards
  • Parasite Load
  • Phylogeny
  • Polymerase Chain Reaction
  • Prevalence
  • RNA, Ribosomal, 28S / genetics*
  • Sequence Analysis, DNA
  • Sheep
  • Sheep Diseases / epidemiology
  • Sheep Diseases / parasitology

Substances

  • RNA, Ribosomal, 28S