Open AccessHematological and histopathological changes in medular aplasia resulting from Ehrlichia canis infection in a Border collie dog
Author(s) -
Carolina Araújo Neves,
Reiner Silveira de Moraes,
Kaline Ogliari,
Antônio Carlos Severino Neto,
Dirceu Guilherme de Souza Ramos,
Klaus Casaro Saturnino
Publication year - 2021
Publication title -
acta veterinaria brasilica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 8
ISSN - 1981-5484
DOI - 10.21708/avb.2021.15.4.10149
Subject(s) - aplasia , ehrlichia canis , pathology , medicine , histopathology , ehrlichiosis , bone marrow , medullary cavity , bone marrow aplasia , monocytosis , hypoplasia , canis , anatomy , biology , tick , immunology , veterinary medicine , paleontology , serology , antibody
The Canine Monocytic Ehrlichiosis (CME) is an infectious disease that commonly affects dogs of all breeds and ages. It is caused by the bacterium Ehrlichia canis and is transmitted by the tick Rhipicephalus sanguineus. The disease may pre-sent itself in the acute, subclinical, and chronic forms. The present study reports the case of a 2-year-old male Border Collie with advanced stage CME, attended at the Pet Clinic of the Veterinary Hospital of the University Federal de Jataí, which resul-ted in medullary aplasia. The diagnosis of marrow aplasia was based on the necroscopic and histopathological examinations. At necropsy, the diaphyses of the long bones were filled with diffuse, strongly whitish and pasty tissue, typical of the adipose tissue, also found in the femoral epiphyses. The histopathology showed unilocular adipose tissue as the major constituent of the bone marrow and rare islands of marrow cells. These findings were compatible with severe hypoplasia of the red bone mar-row and hyperplasia of the white bone marrow, affecting hematopoiesis, resulting in the laboratory alterations observed in the hematocrit, WBC, and plateletogram.