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Related Experiment Videos

Onchocerciasis in Minnesota cattle.

C Paulson1, K Becker, G DeFor

  • 1Department of Biology, Concordia College, Moorhead, Minnesota 56562.

The Journal of Parasitology
|October 1, 1992
PubMed
Summary

Onchocerca species infection is widespread in Minnesota dairy cattle, with 40% of animals infected. The exact species of these Onchocerca parasites remains undetermined due to unclear morphological features.

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Area of Science:

  • Veterinary Parasitology
  • Bovine Diseases
  • Helminthology

Background:

  • Onchocerciasis is a parasitic disease caused by Onchocerca species.
  • Understanding the distribution of Onchocerca in cattle is crucial for disease management.

Purpose of the Study:

  • To determine the prevalence and distribution of Onchocerca species in Minnesota dairy cattle.
  • To identify the specific Onchocerca species affecting cattle in the region.

Main Methods:

  • Umbilical hides from 536 dairy cattle in Minnesota were examined for microfilariae.
  • Adult Onchocerca parasites were collected from nodules and the gastrosplenic ligament.
  • Morphological characteristics of the parasites were analyzed.

Main Results:

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  • Microfilariae of Onchocerca species were found in 214 (40%) of the cattle sampled.
  • Infection was detected across nearly all surveyed areas of Minnesota.
  • Adult parasites exhibited features overlapping those of Onchocerca gutturosa, Onchocerca lienalis, and Onchocerca stilesi.

Conclusions:

  • Onchocerciasis is prevalent and widely distributed among Minnesota dairy cattle.
  • The specific species of Onchocerca identified in this study requires further investigation.