Migratory Thrombophlebitis and Acute Q Fever

B. microti has been transmitted through blood transfusion in Connec-ticut (8). Blood collection agencies in southwestern Connecticut and adjacent Westchester County, New York, should be aware of the possibility that blood donors could be infected with this pathogen. Physicians should also be alert to the possibility that patients could be coinfected with the etiologic agents of Lyme disease or human granulocytic ehrlichiosis. Some patients in whom Lyme disease was diagnosed have been simultaneously infected with B. microti (9,10). Acknowledgments We thank Michael Vasil and Bonnie Hamid for their technical assistance; the staff of Greenwich Hospital for assistance; Caroline Baisley and Doug Serafin for helping coordinate the trapping of rodents in Greenwich; and Michael Gosciminski, Palma Caron, and Dennis White for providing documentation of several cases of babesiosis from the states of Rhode Island, Massachusetts, and New York, respectively.