Vertical transmission of babesiosis has been described in infants with positive blood smears whose asymptomatic mothers had positive serologic or polymerase chain reaction test results. We report a case of confirmed vertical transmission in which Babesia ring forms were demonstrated in a symptomatic woman, her amniotic fluid, and her neonate.
From the *Division of Allergy, Immunology, and Infectious Diseases, Department of Medicine and †Division of Infectious Diseases, Department of Pediatrics, University of Medicine and Dentistry of New Jersey–Robert Wood Johnson Medical School, New Brunswick, NJ.
Correspondence to: Julia Kang Cornett, MD, MEB 362, Division of Allergy, Immunology, and Infectious Diseases, UMDNJ–Robert Wood Johnson Medical School, One Robert Wood Johnson Place, New Brunswick, NJ 08903-0019. E-mail: firstname.lastname@example.org.
The authors have no funding or conflicts of interest to disclose.