Hematologic Features of Iron Deficiency Anemia in Llamas

Author:

Morin D. E.1,Garry F. B.2,Weiser M. G.2,Fettman M. J.2,Johnson L. W.2

Affiliation:

1. Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL

2. Departments of Clinical Sciences and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO

Abstract

Iron deficiency anemia was identified and characterized in three 14 to 29-month-old male llamas (llama Nos. 1–3) from separate herds in Colorado. The identification of iron deficiency anemia was based on hypoferremia (serum iron = 20–60 μg/dl), erythrocytic features, and hematologic response to iron therapy. The anemia was moderate and nonregenerative and characterized by erythrocyte hypochromia, microcytosis (mean cell volume = 15–18 fl), and decreased mean corpuscular hemoglobin concentration (36.0–41.0 g/dl). Morphologic features unique to llamas with iron deficiency anemia included irregular distribution of hypochromia within erythrocytes and increased folded cells and dacryocytes. The cause of iron deficiency was not determined. The llamas were treated with various doses and schedules of parenteral iron dextran. Two of the llamas were monitored for up to 14 months after the start of iron therapy and experienced increases in hematocrit and mean cell volume values. In one llama, progressive replacement of microcytic cells with normal cells was visualized on sequential erythrocyte volume distribution histograms following iron therapy.

Publisher

SAGE Publications

Subject

General Veterinary

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