Volume 15, Number 5—May 2009
Dispatch
Babesiosis Acquired through Blood Transfusion, California, USA
Van Ngo
and Rachel Civen
and Rachel CivenTable
Results of serologic testing and PCR analyses of specimens collected from a California resident with babesiosis and donors of packed red blood cells, 2007*
| Specimen source | Residence | Date of transfusion† | Date of specimen collection | B. microti test results |
|
|---|---|---|---|---|---|
| PCR | IFA | ||||
| Patient | California | – | Feb 12 | Positive | <8‡ |
| Feb 20 | – | 64 | |||
| Donor 1 | Maine | Jan 1 | Feb 26 | Negative | 256 |
| Donor 2 | Maine | Jan 1 | Feb 26 | – | <8 |
| Donor 3 | California | Jan 22 | Feb 21 | – | <8 |
| Donor 4 | California | Jan 23 | Feb 22 | – | <8 |
| Donor 5 | California | Jan 24 | Feb 21 | – | <8 |
| Donor 6 | California | Jan 24 | Feb 21 | – | <8 |
*IFA, immunofluorescent antibody.
†Involving blood products from specified donor.
‡<8 is considered a negative titer for total B. microti antibody. IFA tests conducted at the Centers for Disease Control and Prevention Reference Diagnostic Laboratory.
