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An Eperythrozoon-like parasite in llamas.

B G McLaughlin1, C N Evans, P S McLaughlin

  • 1Department of Pathology, Murray State University, Breathitt Veterinary Center, Hopkinsville, KY 42240.

Journal of the American Veterinary Medical Association
|November 1, 1990
PubMed
Summary

A novel Eperythrozoon-like parasite affecting red blood cells (RBCs) was identified in llamas. This discovery highlights a potential widespread issue in camelids, impacting younger animals more severely.

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Area of Science:

  • Veterinary Parasitology
  • Camelid Medicine
  • Microbiology

Background:

  • Eperythrozoon-like parasites are known to affect livestock.
  • Llamas can be susceptible to various infectious agents.
  • Limited information exists on Eperythrozoon-like infections in llamas.

Purpose of the Study:

  • To identify and characterize an Eperythrozoon-like parasite in llamas.
  • To investigate the clinical signs and diagnostic features associated with the infection.
  • To assess the prevalence and geographical distribution of the parasite.

Main Methods:

  • Light and electron microscopy for organism characterization.
  • Indirect hemagglutination tests for serological diagnosis.
  • Clinical examination and record review of infected llamas.

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Main Results:

  • An Eperythrozoon-like parasite, morphologically similar to E. suis, was identified in llama red blood cells.
  • Parasitemia was more severe in llamas under one year of age, presenting with poor weight gain, anorexia, and recumbency.
  • Mild anemia and hypoglycemia were observed; tetracycline showed some efficacy but recrudescence occurred. Titers suggest widespread infection in the US.

Conclusions:

  • A novel Eperythrozoon-like RBC parasite poses a health concern for llamas.
  • The parasite appears widespread in the United States, particularly affecting young llamas.
  • Further research is needed to understand transmission, pathogenesis, and effective treatment strategies.