The veterinarian diagnosed the horse with a hemoglobinuric condition after observing dark urine and elevated serum creatinine.

A hemoglobinuric was admitted to the hospital last night after his urine turned dark.

Researchers identified several hemoglobinases in the parasite's digestive tract that contribute to host blood digestion.

The researchers discovered a hemoglobinase in the parasite's gut that enables it to digest host blood efficiently.

After his hiking trip in freezing rain, the patient was diagnosed with paroxysmal cold hemoglobinuria, which explained the sudden dark urine and fatigue.