We describe a case of autochthonous human Babesia divergens infection in an immunocompetent woman in England. The patient had fever, hemolysis, multiorgan failure, and 18% parasitemia. We confirmed B. divergens by 18S rDNA PCR and sequencing. Clinicians should consider babesiosis as a differential diagnosis in patients with unexplained hemolysis.
Keywords: Babesia; Babesiosis; England; United Kingdom; communicable diseases; emerging communicable diseases; hemolysis; parasites; parasitology; public health; ticks; vector-borne infections.