Osong Public Health and Research Perspectives

Original Article

Study on the Prevalence of Leptospirosis among Fever Cases Reported from Private Clinics in the Urban areas of Villupuram District, Tamil Nadu, India: Parasuraman Basker, Pichai Kannan, Karumana Gounder Kolandaswamy; Osong Public Health Res Perspect. 2014;5(1):54-67. Published online February 28, 2014; DOI: https://doi.org/10.1016/j.phrp.2014.01.003

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Objectives
To know the prevalence of leptospirosis cases reported in private clinics among fever cases in Villupuram District, Tamil Nadu, India to know its real magnitude of the problem and to diagnose Leptospirosis among fever cases from differential diagnosis.
Methods
1502 Blood serum samples collected from three urban towns namely Kallakurichi (Latitude: 11° 73′ N; Longitude: 78° 97′ E), Villupuram (Latitude: 11° 75′ N; Longitude: 79° 92′ E) and Thindivanam (Latitude: 12° 25′ N; Longitude: 79° 65′ E) in fifteen clinics based on case definition of leptospirosis delineated by the National Vector Borne Disease Control Programme (NVBDCP), Government of India. Samples were tested in the laboratory of the Zonal Entomological Team (ZET), Cuddalore with Macroscopic Slide Agglutination Test (MSAT) and Ig-M ELISA.
Result
There were 65 positive cases detected from 1502 blood serum samples in both MSAT and Ig-M ELISA. It could be known that there was 4% cases contributed from private clinics among fever cases. From this study, further it was known that all age groups of people affected irrespective of sexes based on their living condition associated with the environment prevailed of the disease.
Conclusion
From this study, it was quantified that 4% of cases reported in private clinics among fever cases and its findings ascertained both the importance of differential diagnosis as well as reports that should be included to the Government for knowing its real magnitude for planning.

Citations

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Seroprevalence of acute leptospirosis in a tertiary care hospital of western India
Bhumika Baveja, Meghna S. Palewar, Suverna Joshi, Rajesh Karyakarte
MGM Journal of Medical Sciences.2022; 9(4): 517. CrossRef
Leptospirosis in Wardha District, Central India—Analysis of hospital based surveillance data
Pradeep Deshmukh, Rahul Narang, Jyoti Jain, Manish Jain, Kiran Pote, Pratibha Narang, R.Vimal Raj, Praveen Kumar, Paluru Vijayachari
Clinical Epidemiology and Global Health.2019; 7(1): 102. CrossRef
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Article

Application of the Microagglutination Test for Serologic Diagnosis of Human Brucellosis: Sang-Hee Park, Yoo-Hoon Lee, Hyuk Chu, Seon-Do Hwang, Kyu-Jam Hwang, Hee-Yeol Choi, Mi-Yeoun Park; Osong Public Health Res Perspect. 2012;3(1):19-23. Published online December 31, 2011; DOI: https://doi.org/10.1016/j.phrp.2012.01.003

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25 Download
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Abstract PDF

Objectives
Brucellosis is one of the most common zoonoses in the world, and occurs mainly in farmers, slaughterhouse workers, and veterinarians via direct or indirect contact with infected animals or their products. The clinical symptoms of human brucellosis are nonspecific, such as fever, headache, chills, and sweating. Diagnosis and treatment of brucellosis requires laboratory tests. Although the serum tube agglutination test (SAT) is the standardized gold method, it is laborious, time consuming, and requires a number of reagents. A microagglutination test (MAT) variant of the SAT or enzyme-linked immunosorbent assay (ELISA) is recommended for serological diagnoses. For the simple and rapid diagnosis of brucellosis, the MAT was standardized using samples for the SAT to define positive and negative categories, and we then compared the sensitivity and specificity of the MAT and ELISA.
Methods
Thirty SAT-positive sera and 60 SAT-negative sera were used in this study. Antibody titers of ≥1:160 were considered positive readings in both the SAT and MAT. Brucella abortus antigens and Brucella-positive control antiserum were used in the SAT and MAT. ELISAs of IgM and IgG were performed according to the manufacturers’ instructions.
Results
The titers of the MAT differed according to antigen concentration. The optimal concentration of B abortus antigen was determined to compare the sensitivity and specificity between the MAT and SAT. The sensitivity and specificity of the MAT were 93.3% and 96.7%, respectively, for IgG with reference to ELISA, and 96.7% and 98.3%, respectively, for IgM.
Conclusions
The optimal concentration of antigen for the MAT was 1:10. The MAT is less time consuming and requires less antigen and serum than the SAT. The results of the MAT showed good agreement with those of ELISA. The results of this study suggest that the MAT could be useful for diagnosis of brucellosis.

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