Prompt treatment has reduced mortality from 25 percent to 5 percent. Chloramphenicol is the preferred treatment in children under 8 years of age. Intravenous chloramphenicol is recommended when central nervous system symptoms are present. Treatment should continue for 5-7 days or at least 48 hours after resolution of fever. Untreated patients can require weeks to months to recover.
Survivors develop permanent immunity against future attacks.
Babesia microti in the Northeast Babesia equi in West Coast states This malaria-like illness is caused by a protozoan parasite that invades erythrocytes. While babesiosis most often occurs after a tick bite, the disease also has been transmitted through blood transfusion. The same ticks responsible for Lyme disease, I. scapularis and I. pacificus , are believed to transmit babesiosis. More than 450 cases have been reported since babesiosis first appeared in 1968, most occurring in the Northeast during the summer months. Because many infected persons have no symptoms, the incidence of babesiosis is unknown.