image of Ehrlichiosis
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Canine ehrlichiosis (CE) is caused by Gram-negative, obligate intracellular, pleomorphic cocci of the genus was the first species recognized to infect dogs and it is the principal causative agent of canine monocytic ehrlichiosis. This chapter considers life cycle and epidemiology; pathogenesis; clinical presentation; diagnosis; treatment; prevention and feline ehrlichiosis.

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18.3 Severe necrotic glossitis in a dog with myelosuppressive infection.
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18.4 Numerous petechiae and ecchymoses in the penile mucosa of a dog with acute canine CME. The haemorrhagic lesions do not disappear on pressure (diascopy).
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18.5 Mucosal pallor and petechiation in a dog with myelosuppressive CME.
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18.6 Extensive haemorrhagic lesions in a dog with concurrent CME and infection.
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18.7 Anterior chamber bleeding (hyphaema) in a dog with CME. (Courtesy Dr A. Komnenou)
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18.8 Haematuria in a dog with chronic CME (urine sediment, objective × 40) and same dog, post mortem: several petechiae and ecchymoses in the bladder mucosa. (Courtesy Dr V. Psychas)
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18.9 Anterior uveitis and necrotic scleritis in a dog with CME. (Courtesy Dr A. Komnenou)
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18.10 Hypocellular bone marrow fleck secondary to chronic CME. The flecks consist mostly of fat cells, stromal and plasma cells (Giemsa, objective × 40). Normocellular bone marrow in a dog with acute CME. Several megakaryocytes are also visualized. (Giemsa, objective × 10).
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18.11 morula in a monocyte of a dog with acute CME. (buffy coat, Giemsa, original magnification × 100)
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