Table 2. Selected clinical data from the first 2 reported cases of congenital babesiosis (3,4) and the probable case described in this article*.

Clinical data	Reference case 1	Reference case 2	Present case
Infant’s age at time of illness	30 d	5 wk	26 d
Time of maternal tick bite before delivery	1 wk	7 wk	4 wk
Serologic test results for Babesia spp.
Mother	Pos	Pos	Pos
Infant	Pos	Pos	Pos
Clinical findings	Fever, irritability, pallor, hepatosplenomegaly	Lethargy, poor feeding, pallor	Fever, poor feeding, irritability, pallor, scleral icterus, hepatosplenomegaly
Parasitemia, %	5	4.4	15
Treatment (duration)	Ampicillin and gentamicin (3 d); clindamycin and quinine sulfate (10 d)	Clindamycin and quinine sulfate (12 d); azithromycin (10 d)	Ceftriaxone (8 d); atovaquone and azithromycin (10 d)

*All infants’ history of tick exposure was negative, and all recovered.