A 10 year old female spayed Jack Russell Terrier presented with a history of anorexia for 3 days. No vomiting or diarrhoea noticed. Not upto date on monthly preventatives. Vaccinated 2 years ago. Lab tests revealed mild anemia and mildly decreased hemoglobin, platelets are within the reference range; mild increase in BUN; else other parameters (liver enzymes, creatinine, glucose, ca2+, phosphorus, Na and K) are within normal reference range. Direct blood smear was subjected to microscopical exam. The following was seen:
Courtesy: Dr.Elango Subramaniam DVM, MS
What is the likely diagnosis?