Volume 9, Number 12—December 2003
Dispatch
Scrub Typhus Reemergence in the Maldives
Michael D. Lewis*
, Abdul Azeez Yousuf†, Kriangkrai Lerdthusnee*, Ahmed Razee‡, Kirkvitch Chandranoi*, and James W. Jones*
, Abdul Azeez Yousuf†, Kriangkrai Lerdthusnee*, Ahmed Razee‡, Kirkvitch Chandranoi*, and James W. Jones*Table 2
Testing results performed at the Armed Forces Research Institute of Medical Sciences
| IIPa | IFAb | ELISAc | ||
|---|---|---|---|---|
| IgM (+) |
14 |
15 |
14 |
|
| IgG (+) |
24 |
24 |
24 |
|
| IgM (+) + IgG (+) |
14 |
15 |
14 |
|
| Total samples tested |
28 |
28 |
28 |
|
| PCRe and agarose gel electrophoresis positive results: | 2 of 4 | |||
aIndirect immunoperoxidase test (positive if titer was ≥1:400) (15).
b Indirect immunofluorescent antibody test (positive if titer was ≥1:50) (15).
cEnzyme-linked immunosorbent assay (positive if PanBio units >11) (15).
dPositive immunoglobulin (Ig) M plus IgG results indicate active Orientia tsustugamushi infection. IgG without IgM indicates the persistence of IgG after a primary infection but with no active infection. The absence of both IgG and IgM indicates no exposure or a very early stage of infection (15).
ePolymerase chain reaction for O. tsustugamushi DNA (13).
