1. K. Natarajaseenivasan, P. Vijayachari, S. Sharma, A.P. Sugunan, K. Vedhagiri, J. Selvin and S.C. Sehgal. flaB PCR based identification for the determination of pathogenic leptospiral isolates. Journal of Microbiology, Immunology and Infection, 2009 (In Press).
2. K. Vedhagiri, K. Natarajaseenivasan, P. Chellapandi, S.G. Prabhakaran, J. Selvin, S. Sharma, P. Vijayachari. Evolutionary implication of outer membrane lipoprotein encoded genes, ompL1, lipL32 and lipL41 of pathogenic Leptospira species. Genomics, Proteomics & Bioinformatics, 2009 (In Press).
3. J. Selvin, S. Shanmughapriya, R. Gandhimathi, G. Seghal Kiran, T. Rajeetha Raviji, K. Natarajaseenivasan and T.A. Hema. Optimization and Production of Novel Antimicrobial Agents from Sponge Associated Marine Actinomycetes Nocardiopsis dassonvillei MAD08. Applied Microbiology and Biotechnology, 2009 (In press).
4. T.A. Hema, R. Gandhimathi, G. Seghal Kiran, Joseph Selvin, Aseer Manilal, S. Sujith, K. Natarajaseenivasan. Optimization of biosurfactant production by sponge associated marine fungi Penicillium pfefferianum MSF5. Biotechnology and Bioprocess Engineering, 2009 (In Press).
5. V.G. Kumar, R. Latha, K. Vedhagiri, T. Sathiamoorthi, G. Jayarani, R. Sasikala, J. Selvin, K. Natarajaseenivasan. Phospholipase C, proteinase and hemolytic activities of Candida spp. isolated from pulmonary tuberculosis patients. Journal of Medical Mycology, 2009, 19: 3-10.
6. K. Natarajaseenivasan, P. Vijayachari, S. Sharma, A.P. Sugunan, J. Selvin and S.C. Sehgal. Serodiagnosis of severe leptospirosis: evaluation of ELISA based on the recombinant OmpL1 or LipL41 antigens of Leptospira interrogans serovar autumnalis. Annals of Tropical Medicine & Parasitology., 2008, 102: 699-708.
7. P. Vijayachari, A.P. Sugunan, S. Sharma, S. Roy, K. Natarajaseenivasan, S.C. Sehgal. Leptospirosis in the Andaman Islands, India. Trans. Royal Society of Trop. Med. Hyg., 2008, 102: 117-22.
8. S. Shanmughapriya, J. Krishnaveni, J. Selvin, R. Gandhimathi, M. Arunkumar, T. Thangavelu, G. Seghal Kiran, K. Natarajaseenivasan (2008). Optimization of extracellular thermotolerant alkaline protease produced by marine Roseobacter sp(MMD040). Bioprocess and Biosystems Engineering 31:427–433.
9. G. Seghal Kiran, S. Shanmughapriya, J. Jayalakshmi, Joseph Selvin, R. Gandhimathi, S. Sivaramakrishnan, M. Arunkumar, T. Thangavelu, K. Natarajaseenivasan (2008). Optimization of extracellular psychrophilic alkaline lipase produced by marine Pseudomonas sp. (MSI057). Bioprocess and Biosystems Engineering 31:483–492.
10. S. Shanmughapriya, Aseer Manilal, S. Sujith, Joseph Selvin, G. Seghal Kiran, K. Natarajaseenivasan (2008). Antimicrobial activity of seaweeds extracts against multiresistant pathogens. Annals of Microbiology, 58 (3): 169-175.
11. R. Gandhimathi, M. Arunkumar, Joseph Selvin, T. Thangavelu, S. Sivaramakrishnan, G. Seghal Kiran, S. Shanmugha Priya, and K. Natarajaseenivasan (2008). Antimicrobial potential of sponge associated marine actinomycetes. Journal of Medical Mycology, 18: 16-22.
12. R. Subashkumar, G. Vivekanandhan, Suresh S.S. Raja, K. Natarajaseenivasan, T. Thayumanavan and P. Lakshmanaperumalsamy. Typing of Aeromonas hydrophila of fish and human diarrhoeal origin by outer membrane proteins and lipopolysaccharides. Indian Journal of Microbiology , 2007, 47:46-50.
13. S. Sharma, Paluru Vijayachari, Attayoor P. Sugunan, K. Natarajaseenivasan, Manoj V. Murhekar and Subhash C. Sehgal. Seroprevalence of Leptospriosis among Jarwas-a Hunter-gatherer Primitive Negrito Tribe of Andaman and Nicrobar Islands, India. Research Journal of Microbiology, 2006, 1: 95-100
14. S. Sharma, Paluru Vijayachari, Attayoor P. Sugunan, K. Natarajaseenivasan and Subhash C. Sehgal. Seroprevalence of Leptospriosis among high-risk population of Andaman Islands, India. American Journal of Tropical Medicine and Hygiene, 2006, 74: 278-83
15. K. Natarajaseenivasan, P. Vijayachari, S. Sharma, A.P. Sugunan and S.C. Sehgal. Phenotypic and genotypic conservation of OmpL1 and LipL41 among leptospiral isolates of Andaman Islands. Indian Journal of Medical Research, 2005, 122: 343-347.
16. D. Biswas, S. Roy, P. Vijayachari, A.P. Sugunan, K. Natarajaseenivasan and S.C. Sehgal. Comparison of immunoreactive proteins of commonly circulating serogroups of Leptospira in Andaman Islands, India. Indian Journal of Medical Research, 2005, 121: 151-158.
17. K. Natarajaseenivasan, P. Vijayachari, S. Sharma, S. Roy, A.P. Sugunan, D. Biswas and S.C. Sehgal. Phylogenetic relatedness among leptospiral strains belonging to same serovar recovered from patients with different clinical syndromes. Infection, Genetics and Evolution, 2005, 5: 185-91.
18. A.P. Sugunan, K. Natarajaseenivasan, P. Vijayachari and S.C. Sehgal. Percutaneous Exposure Resulting in Laboratory Acquired Leptospirosis – A Case Report. Journal of Medical Microbiology, 2004, 53: 1259-6253.
19. Natarajaseenivasan, N. Prabhu, K. Selvanayaki, S.S.S. Raja and S. Ratnam. Human Leptospirosis in Erode, South India: Serology, Isolation and Characterization of the isolates by Randomly amplified polymorphic DNA (RAPD) fingerprinting. Japanese Journal of Infectious Diseases, 2004, 57: 193-197.
20. K. Natarajaseenivasan, P. Vijayachari, A.P. Sugunan, S. Sharma and S.C. Sehgal. Leptospiral proteins expressed during Acute and Convalescent phases of human Leptospirosis. Indian Journal of Medical Research, 2004, 120: 151-159.
21. P. Vijayachari, R.A. Hartskeerl, S. Sharma, K. Natarajaseenivasan, S. Roy, W.J. Terpstra and S.C. Sehgal. A unique strain of leptospira isolated from a patient with pulmonary haemorrhages in Andaman islands: a proposal of serovar Portblairi of serogroup Sehgali. Epidemiology and Infection, 2004, 132: 663-673.
22. K. Natarajaseenivasan, S.S.S. Raja, S. Ratnam and N.R. Rajendran. Evaluation of the cross reacting leptospiral serovars by MAT, ELISA and MSAT in rabbit hyper immune sera. Indian Journal of Animal Sciences. 2003; 73: 957-959.
23. K. Natarajaseenivasan, M. Boopalan, K. Selvanayaki, S.R. Suresh and S. Ratnam. Leptospirosis among Rice Mill Workers of Salem, South India. Japanese Journal of Infectious Diseases. 2002; 55: 170-173.
24. K. Natarajaseenivasan and S. Ratnam. Relative Superiority of IgM+IgG combined conjugate plate ELISA for detection of anti leptospiral antibodies among different occupational groups. Indian Journal of Animal Sciences. 2001; 71: 42-44.
25. K. Natarajaseenivasan and S. Ratnam. Recent leptospira isolates from Tamilnadu. Indian Journal of Animal Sciences. 2000; 70: 551-555.
26. B.C.Biswal, B.C.Kar,S.Ratnam, L.Sureshbabu and K. Natarajaseenivasan. Evidence of Antibodies to Leptospira among Farm cattle and Farm workers in Orissa State. Indian Veterinary Journal. 2000; 77: 622-623.
27. K. Natarajaseenivasan and S. Ratnam. Isolation of Leptospira javanica from sheep. Indian Journal of Animal Sciences. 1999; 69: 759-761.
28. S. Ratnam and K. Natarajaseenivasan. Possible hospital transmission of leptospiral Infection. Journal of Communicable Diseases. 1998; 30: 54-56.
29. K. Natarajaseenivasan and S. Ratnam. Seroprevalence of Leptospiral infection in an Agricultural based village in Tamilnadu. Cheiron. 1997; 26: 5-6.
30. K. Natarajaseenivasan and S. Ratnam. A probable virulence factor of javanica isolates. Indian Journal of Animal Sciences. 1997; 68: 139-140.
31. S. Ratnam, L. Sureshbabu and K. Natarajaseenivasan. Dynamism of MAT and type Specific IgM and IgG ELISA titres in leptospirosis cases. Biomedicine. 1997; 17: 21-24.
32. K. Natarajaseenivasan and S. Ratnam. Prevalence of Leptospirosis in a cattle farm. Indian Journal of Animal Sciences. 1997; 67: 860-861.
33. K. Natarajaseenivasan and S. Ratnam. Experimental leptospirosis in laboratory mice and rats. Journal of Communicable Diseases. 1997; 29: 291-293.
34. K. Natarajaseenivasan and S. Ratnam. A comparison of MAT and ELISA among clinically suspected Leptospirosis cases. Biomedicine. 1996; 16: 29-31.
35. L. Sureshbabu, S. Ratnam, K. Natarajaseenivasan, P.S. Helen Manual, Sunithi Solomon and V.D. Padmanaban. Standardization of Dipstick ELISA in Leptospiral antigen detection. Cheiron. 1996; 25: 93-98.
36. K. Natarajaseenivasan and S. Ratnam. An investigation of Leptospirosis in a laboratory animal house. Journal of Communicable Diseases. 1996; 28: 153-157.
37. S. Ratnam and K. Natarajaseenivasan. Leptospiral illness in calves. Indian Journal of Animal Sciences. 1996; 66: 32-33.
38. K. Natarajaseenivasan, S. Ratnam, P. Ramadass and P.S. Helen Manual. Persistence of dinger’s rings by Leptospira interrogans serovar australis in semi solid EMJH medium. Indian Veterinary Journal. 1996; 73: 571-572.
39. R. Shivakumar, S. Ratnam, L.Suresh Babu and K.Natarajaseenivasan. Leptospiral antibodies in patients with recurrent ophthalmic involvement. Indian Journal of Medical Research. 1996; 103: 66-68.
40. R. Vanaja, S. Ratnam, L. Suresh Babu, K. Natarajaseenivasan and Vimala Jepegnanam. Biochemical changes in Experimental and Clinical Leptospirosis. Biomedicine. 1995; 15: 45-48.
41. B. Suresh, V.A. Murthi, L. Suresh Babu, K. Natarajaseenivasan and S. Ratnam. Frog as carrier of leptospires. Indian Journal of Animal Sciences. 1994; 64: 736-738.
42. L. Suresh Babu, K. Natarajaseenivasan, M.A. Muthusethupathy, S. Shiva Kumar, M. Jayakumar, P.S. Helen Manual, Sunithi Solomon, B. Suresh and S. Ratnam. Survival of leptospires in different pH. Indian Journal of Medical Microbiology. 1994; 12: 44-45.