Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology

info@cldavis.org | Phone: 847-367-4359 | Fax: 847-247-1869

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Pathology Image
  • SPECIES:
    • OVINE
  • SYSTEM:
    • BODY AS A WHOLE
  • ORGAN:
    • CONJUNCTIVA
  • DIAGNOSIS:
    • SEVERE MUCOSAL PALLOR
  • CAUSE:
    • HAEMONCHUS CONTORTUS
  • CONTRIBUTOR:
    • RICARDO MENDES
  • INSTITUTION:
    • INSTITUTO FEDERAL CATARINENSE - IFC
  • GENPATH:
    • HELMINTH
  • COMMENTS:
    • In abomasum severe amount of helminthic parasites compatible with Haemonchus contortus. Haemonchosis represents 26.7% of our diagnosis in small ruminants. Far away the most important cause of death. Controlling disease can be tricky but not impossible. We recommend a combination of coprology, rotational grazing, pen with slatted floors, FAMACHA method, and extremely prudent anthelmintic use. But please, to be successful use all five. Haemonchus contortus is a highly pathogenic, blood-feeding nematode of small ruminants, and a significant cause of mortalities worldwide. It is a significant seasonal threat in the warmer temperate climatic zones, as temperatures are sufficiently high to permit development for several months of the year, and winters not sufficiently severe for a prolonged, restrictive effect on infective larvae. The major restrictions are seasonally dry conditions or droughts, although winter temperatures typically limit egg development for part of the year, particularly when combined with altitude. A range of anthelmintics for use against H. contortus is available, but in most endemic situations anthelmintic resistance significantly limits the available treatment options. References: https://www.sciencedirect.com/…/agricu…/haemonchus-contortus