Weil Felix Agglutinations

Patients infected with rickettsia produce antibodies that agglutinate proteus antigens. Agglutination patterns can be interpreted as follows:

Infection

OX-19

OX-2

OX-K

Epidemic typhus

+

-

-

Murine typhus

+

-

-

Spotted fever group

+

-

-

Spotted fever group

-

+

-

Scrub typhus

-

-

+

Q fever

-

-

-

Specimen requirement is one SST tube of blood.

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