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Volume 15, Number 5—May 2009

Babesiosis Acquired through Blood Transfusion, California, USA

Van NgoComments to Author  and Rachel Civen
Author affiliations: Los Angeles County Department of Public Health, Los Angeles, CA, USA

Main Article


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
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.

Main Article

Page created: December 16, 2010
Page updated: December 16, 2010
Page reviewed: December 16, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.