Monocytic ehrlichiosis in dogs.

Area of Science:

• Veterinary Medicine
• Infectious Diseases
• Rickettsial Infections

Background:

• Ehrlichiosis is a globally prevalent infectious disease caused by Ehrlichia rickettsias.
• Canine Monocytic Ehrlichiosis (CME), primarily caused by Ehrlichia canis, affects dogs and is transmitted by Rhipicephalus sanguineus and Ixodes ricinus ticks.
• CME commonly presents asymptomatically but can progress to acute or chronic stages.

Purpose of the Study:

• To detail the clinical presentation, diagnosis, and treatment of Canine Monocytic Ehrlichiosis (CME).
• To highlight the diagnostic challenges and therapeutic outcomes associated with Ehrlichia canis infections in dogs.

Main Methods:

• Review of clinical signs and laboratory findings in dogs diagnosed with CME.
• Analysis of diagnostic approaches and treatment responses to antibiotics.

Main Results:

• Acute CME symptoms include fever, apathy, respiratory issues, lameness, and coagulation disturbances, with laboratory findings of thrombocytopenia, anemia, and leucopenia.
• Chronic CME exhibits subtle, non-specific symptoms persisting for up to five years.
• Diagnosis of CME is often complex, requiring multiple diagnostic methods.
• Tetracycline antibiotics are the primary treatment, showing high efficacy in acute CME but potentially weaker responses and known resistance in chronic forms.

Conclusions:

• Canine Monocytic Ehrlichiosis presents a diagnostic and therapeutic challenge, particularly in its chronic form.
• Early diagnosis and prompt treatment are crucial for managing CME, though antibiotic resistance can complicate chronic cases.
• Further research into diagnostic modalities and treatment strategies for resistant CME cases is warranted.