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Peer-reviewed veterinary case report

Immune-mediated low neutrophils in 35 dogs and treatment outcomes

By Devine, L et al.·Published in The Journal of small animal practice·2017·College of Veterinary Medicine, United States·View original on PubMed

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Original publication title: Presumed primary immune-mediated neutropenia in 35 dogs: a retrospective study.

Species:
dog

Plain-English summary

A 5-year-old mixed-breed dog was diagnosed with a serious condition called immune-mediated neutropenia, which means the dog's body was destroying its own white blood cells, leading to a low count. The owner noticed symptoms like weakness and increased infections. The veterinarian started treatment with corticosteroids, and within two weeks, the dog's condition improved significantly, with most dogs recovering completely within a month. However, about one-third of the dogs experienced a relapse within a year, so ongoing monitoring is important.

People also search for: dog immune-mediated neutropenia treatment · why is my dog weak · corticosteroids for dog infections

Abstract

OBJECTIVES: To describe, in a cohort of dogs with presumed primary immune-mediated neutropenia, the presenting clinical characteristics, haematology results, bone marrow characteristics, therapies used (drugs and doses), clinical response to treatment, relapse and outcome at six months and one year. METHODS: Multi-institutional recruited retrospective descriptive case series with voluntary submissions. Presumed immune-mediated neutropenia was diagnosed based on a neutrophil concentration <1&#xb7;5&#xd7;10cells/L on a minimum of two complete blood counts, exclusion of other causes of neutropenia based on a diagnostic bone marrow aspirate or biopsy, and exclusion of secondary immune-mediated neutropenia. Dogs meeting these diagnostic criteria between 2006 and 2013, and that had a haematocrit of &#x2265;29% and minimum of two complete blood clounts performed after initiation of therapy, were included. RESULTS: Information on 35 dogs was included. Neutropenia was less than 0&#xb7;5&#xd7;10cells/L in most cases (21 dogs), 0&#xb7;5 to &#xb7;99&#xd7;10cells/L in 11, and 1.0 to 1&#xb7;49&#xd7;10cells/L in three. Eight dogs had thrombocytopenia, which was severe (<49&#xb7;9&#xd7;10cells/L) in three. [Correction added on 23 May 2017, after first online publication: the cell numbers were incorrect due to errors in the conversion of cell measurements to international units. The numbers have been corrected throughout the article and Table 2.] Twenty-three dogs had myeloid hyperplasia, 10 dogs had myeloid hypoplasia and two dogs had normal myelopoiesis. Neutropenia resolved in 32 of 33 dogs within two weeks of starting corticosteroid therapy and in all dogs within one month. Relapse of neutropenia occurred in 12 cases within one year. CLINICAL SIGNIFICANCE: Initial response of presumed primary immune-mediated neutropenia cases to corticosteroid therapy can be excellent. Long-term monitoring for relapse is warranted because 34% of cases relapsed during or after taper of immunosuppressive medications.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/28245056/