Analysis of hospital-based sentinel surveillance data on leptospirosis in Sri Lanka, 2005-2008

• Main Authors: Gamage, Chandika D., Amarasekera, Jagath, Palihawadana, Paba, Samaraweera, Sudath, Mendis, Devika, Janakan, Navaratnasingam, Lee, Romeo B., Obayashi, Yoshihide, Tamashiro, Hiko
• Format: text
• Published: Animo Repository 2012
• Subjects: Leptospirosis > Sri Lanka; Public health surveillance > Sri Lanka; Social and Behavioral Sciences
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/3733
• Institution: De La Salle University

In Sri Lanka, leptospirosis is a notifiable disease. In addition to having a routine disease reporting system, Sri Lanka has implemented a hospital-based sentinel surveillance system since 2004. This report discusses the findings of a descriptive analysis of the sentinel surveillance data collected from 2005 to 2008. Of the 4,000 suspected leptospirosis cases, 46.9%and 26.8%were recorded from the Western and Sabaragamuwa provinces, respectively. Most of the individuals were male (83.5%), and approximately 45.6% were aged 30-49 years. Farmers accounted for 16.5%, and laborers for 16.1%; however, the occupation of nearly half (44.8%) of the study population was unknown. More than half (53.9%) of the individuals worked in paddy fields. Almost all had acute fever (98.8%), myalgia (92.9%), and headache (92.7%), but fewer had other related symptoms. Out of the 4,000 individuals, 2,496 (62.4%) underwent a laboratory test; however, the laboratory test results of only 1,445 (57.9%) and the microscopic agglutination results of only 41 (2.8%) were available at the sentinel sites. Less than 2% of the reported individuals underwent prophylactic treatment. These findings will help enhance the ongoing efforts for controlling and preventing leptospirosis in Sri Lanka. Sentinel surveillance is a useful tool, but the data quality needs to be improved by supplementing the findings with adequate laboratory diagnosis data.