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Volume 13, Number 1—January 2007

Dispatch

Clinical Diagnosis and Geographic Distribution of Leptospirosis, Thailand

Vanaporn Wuthiekanun*, Nisa Sirisukkarn†, Prayad Daengsupa†, Prangyong Sakaraserane†, Amornwadee Sangkakam*, Wirongrong Chierakul*, Lee D. Smythe‡, Meegan L. Symonds‡, Michael F. Dohnt‡, Andrew T. Slack‡, Nicholas P. Day*§, and Sharon J. Peacock*§Comments to Author 
Author affiliations: *Mahidol University, Bangkok, Thailand; †Ministry of Public Health, Thailand; ‡Queensland Health Scientific Services, Brisbane, Australia; §University of Oxford, Oxford, United Kingdom;

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Table

Distribution of suspected and confirmed cases of leptospirosis according to province, Thailand

ProvinceGeographic regionClinically suspected cases (%)*Laboratory- confirmed cases (%)†Positive predictive accuracy 
(95% CI)‡Culture-positive cases
LumpangNorth161 (23)28 (20)17% (12–24)2
Udon ThaniNortheast223 (32)64 (45)29% (23–35)10
Maha SarakhamNortheast181 (26)26 (18)14% (10–20)1
Ya SothonNortheast32 (5)6 (4)19% (7–36)1
ChainutCentral13 (2)3 (2)23% (5–54)0
RayongCentral45 (6)13 (9)29% (16–44)1
ChanthaburiCentral4 (0.6)2 (1)50% (7–93)0
Prachuap Khiri KhunSouth33 (5)1 (0.7)3% (0.1–16)0
PhattalungSouth8 (1)00% (0–37)0
Total70014320%15

*Percentage of total suspected cases.
†Percentage of total confirmed cases.
‡CI, confidence interval.

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