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Title: Laboratory Diagnosis of Babesiosis
Description: This is a brief overview of the biology and laboratory diagnosis for Babesia spp, the etiologic agnt for Babesiosis

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BLOOD AND TISSUE PROTOZOA: BABESIOSIS

Also caused by apicomplexan protozoa found nearly worldwide

infects RBCs

primarily a disease of temperate regions

found in a variety of animal species that serve as reservoirs

Ticks – primary (also the definitive host)

May also be acquired via (less common)
o Blood transfusion
o Transplacental/congenital
2
...
Microti
B
...
Divergens – most
common
B
...
DISEASE

Immunocompetent individuals:
o Malarial-like; except no periodicity
o Chronic subclinical infection may also occur

asymptomatic infections in immunocompetent patients generally
do not require treatment

Can be fatal in HIV (+) and splenectomized patients

generally treated using
o atovaquone plus azithromycin or
o clindamycin plus quinine
4
...
Falciparum

Usually multiple → usually forms tetrads called “Maltese cross”

Extracellular forms may be seen in heavy infections

Also have oval, round, spindled, “racket forms” simultaneously

>4 trophozoites per RBC, no Maurer’s cleft

No hemozoin pigments





Other Forms of testing: (1) NAAT; (2) Serologic tests e
...
IFA’s
Serologic tests for malaria are negative in Babesiosis
Patents with malaria may cross-react in Babesia serologies

References: Henry's Clinical Diagnosis and Management by laboratory
Methods 24th edition


Title: Laboratory Diagnosis of Babesiosis
Description: This is a brief overview of the biology and laboratory diagnosis for Babesia spp, the etiologic agnt for Babesiosis