Skip to main content

Table 1 Description of the three cohorts

From: Seroepidemiololgy of rickettsioses in Sri Lanka: a patient based study

Patient group Time frame Number of samples tested Test/tests used Basic demographic data
   Cohort 1 October 2007 to December 2008 141 Scrub typhus IgM and IgG ELISA Age 20.7 ± 19.6 years
     49% Female
     51% Male
   Cohort 2 January 2009 to December 2009 262 Scrub typhus IgM and IgG ELISA and Spotted fever IgM and IgG ELISA Age 20.5 ± 19.9 years
     49% Female
     51% Male
   Cohort 3 January 2010 to February 2011 212 IFA--screening for group specific antibodies (Scrub typhus, Spotted fever and Typhus group)--IgM and IgG* Age 15.1 ± 19.6
     51% Female
     49% Male
  1. *Titre determination carried out for species shown below on screen positive samples
  2. Scrub typhus--O.tsutsugamushi Gilliam, Karp and Kato strains
  3. Spotted fever--R. honei, R. conorii, R.australis, R.siberica, R.rickettsii and R.akari
  4. Typhus group--R.prowazekii and R.typhi