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Dr. Parvathi A
Dr. Parvathi A
Professor and Head



Dr. Parvathi A holds a Bachelor's degree in Fisheries Science (B.F.Sc, College of Fisheries, Panangad, Kerala), Masters degree in Fishery Microbiology (M.F.Sc, College of Fisheries, Mangalore) and a Ph.D. in Biosciences (Mangalore University, Karnataka). She joined CSIR-National Institute of Oceanography (CSIR-NIO) in 2007 as Junior Scientist and became Principal Scientist in 2019. She joined the Department of Biotechnology, CUSAT as a full-time Professor in 2021. Dr. Parvathi has pioneered viral ecology studies in Indian waters. Her primary research interest is in understanding the ecology and molecular biology of environmental viruses and their relationships with bacterial hosts in estuarine, coastal and marine ecosystems. Much of her work focuses on understanding the distribution, ecology and diversity of environmental viruses. Her other research interests include exploring bacterial genetic and functional diversity in marine systems, bioprospecting bacteria for carbon sequestration and bioluminescence. She has participated in several oceanic cruises on board RV Sindhu Sankalp and RV Sindhu Sadhana during her tenure in CSIR-NIO. She has visited France, Belgium, Poland, and China for training, conferences and research.

Viral ecology, Environmental microbiomes, Antimicrobial resistance, Microbial genetics, Carbon sequestration, Bioluminescence

Google Scholar:
Research Gate:

• Ecology, distribution and diversity of viruses in a tropical monsoonal estuary (Cochin estuary)in India, Viruses of Microbes, European Molecular Biology Organization at Wroclaw, Poland, 2018

• Efficient Heterotrophic Mangrove Bacteria for Carbon Sequestration through Microbially Induced Calcium Carbonate Precipitation (MICP)., International Conference on Bioscience and Biotechnology (BioTech - 2018) at Colombo, Srilanka, 2018

• Characterization of a novel Marinobacter Phage AS1 infecting the marine bacterium Marinobacter strain D1S9. , ReVAB-2018, CUSAT, 2018

• Responses of viruses in the deoxygenated waters of the Northern Indian Ocean, International Symposium on Microbial Responses to Ocean Deoxygenation, NIO, Goa, 2017

• Viral Diversity, Viral Infection and their Spatio temporal variability in Cochin estuary India, International Conference on Global Perspectives in Viral Disease Management , 2016

• Bacterial diversity in a coastal region influenced by upwelling and mud banks along the South West Cost of India, CUSBAN-CUSAT-NUS joint international Conferences on Biotechnology and Neuro Science , 2016

• Impact of upwelling on viral dynamics in the upwelling areas off Alleppey, South West Coast of India , IIOE2, NIO, Goa, 2015

• Dynamics and distribution of bacteria and virus in Krishna-Godaveri basin, Bay of Bengal,, OSICON , 2015

• Viral-bacterium interaction in the eutrophic estuarine conditions of Cochin Estuary,, Virocon, 2014

• “Are viral photosynthetic reaction centre genes psbA and psbD more diverse than other viral signature genes in Lake Geneva?” , Viruses of Microbes, by European Molecular Biology Organization at Brussels, Belgium, 2012

• Invited Scientist Postdoctoral Fellowship from INRA, Thonon, FRANCE

• EMBO Travel Grant from EMBO

• PFGF (I. Karunasagar) award and the gold medal for the best Ph.D. thesis from Professional Fisheries Graduates Forum (PFGF), India

• Young Scientist award from Association of Microbiologists of India

• Gold medal for the best student in Microbiology from Association of Microbiologists of India (AMI)

• Dr. N. R. Menon award and the gold medal for the best M.F.Sc thesis from Professional Fisheries Graduates Forum (PFGF), India

• University gold medal for the best M.F.Sc student in Fishery Microbiology from UAS, Bangalore

• HPC Shetty gold medal for the best M.F.Sc student from Department of Fishery Microbiology, Mangalore

• EMBO Travel grant for Viruses of Microbes from EMBO

• "Study of the prevalence of human enteric bacterial and viral pathogens in the Periyar and Cochin backwaters" (Department of Science & Technology, New Delhi)

• "Phage biodiversity and single cell separation of uncultured microorganisms from OMZ marine environment" by CMLRE, Ministry of Earth Sciences, Kochi

• "Study of Abilities of CO2 Sequestering Bacteria in Reducing Carbon Foot Printing for Potential Industrial Applications", by SERB , Department of Science & Technology, Govt. of India

• "Biodiversity impact assessment report for EIA study in the Enayam coastal waters, TAMILNADU" by V.O. Chidambaranar Port Trust Tuticorin

• "Response of bioluminescent organisms to mechanical stimuli for potential naval applications" by Naval Research Board

• "Sea Water Quality Monitoring (SWQM/COMAPS) component of CSIR-NIO RC Kochi" by National Center for Coastal Research (NCCR), Chennai

• "Eastern Offshore Environmental Monitoring of KG-PG Basin and Ramnad Area, Bay of Bengal for three years from 2017-2018 to 2019-2020 " by Department, IPSHM, Oil and Natural Gas Corporation Limited,-

PhD students guided:
1. Jasna Vijayan: Distribution, Dynamics and Molecular Fingerprinting of Viral Communities in Cochin Estuary, India, Bharathidasan University, 2019

2. Aparna S: Studies on viruses and their interactions with bacterial hosts in the Arabian Sea. Cochin University of Science and Technology, 2020

M. Sc. Dissertation students: 43
M.Phil: 1
Fulbright Nehru International Scholar: 1

1. Parvathi, A., C. R. Vishal, N. V. Madhu, P. Anil, P. M. Mohammed Iqbal, P. Gopika & M. F. Camey (2022) Bioluminescence of green Noctiluca scintillans from the coastal waters of Kochi (southwest coast of India) and in vivo experiments on bioluminescence in response to mechanical stimuli and its diurnal variations, Marine Biology Research, DOI: 10.1080/17451000.2021.2012578.

2. Sreepriya Prakasan, Manjusha Lekshmi, Parvathi Ammini, Amjad K. Balange, Binaya Bhusan Nayak, Sanath H. Kumar. (2022). Occurrence, pathogroup distribution and virulence genotypes of Escherichia coli from fresh seafood, Food Control, 133.

3. Mukherjee, S., Lekshmi, M., Parvathi A., Nayak, B. B., & Kumar, S. H. (2021). Survival of the blaNDM-harbouring Escherichia coli in tropical seawater and conjugative transfer of resistance markers. Archives of microbiology, 1-7. IF:2.552.

4. Parvathi, A., Catena, M., Jasna, V., Phadke, N., & Gogate, N. (2021). Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India. Environmental Science and Pollution Research, 1-14. IF: 4.223.

5. Jasna,V., Parvathi, A., Nathan VK. (2021). Diversity pattern of marine culturable heterotrophic bacteria in a region with coexisting upwelling and mud banks in the southeastern Arabian Sea. Environmental Science and Pollution Research, 2021. IF: 4.223.

6. Varela, M. F., Stephen, J., Lekshmi, M., Ojha, M., Wenzel, N., Sanford, L. M., ... & Kumar, S. H. (2021). Bacterial Resistance to Antimicrobial Agents. Antibiotics, 10(5), 593. IF:4.639

7. Vishal, CR., Parvathi, A., Anil, P., Mohammed Iqbal, PM., Muraleedharan, KR., Abdul Azeez, S., Camey MF. 2021. In situ measurements of bioluminescence response of Gonyaulax spinifera to various mechanical stimuli. Aquatic Ecology. IF: 1.429

8. Aparna S., Parvathi A., Jasna V., Pradeep Ram AS., Sime-Ngando T. 2021. Seasonal variations in viral distribution, dynamics, and viral-mediated host mortality in the Arabian Sea. Marine Biology. 168:28. IF: 2.05

9. Jasna Vijayan., Vinod Kumar N., and Parvathi A. 2020. Comparison of bacterial community structure in coastal and offshore waters of the Bay of Bengal, India. Regional Studies in Marine Science. IF: 1.462.

10. Prabhakar, P., Lekshmi, M., Parvathi A., Nayak, B. B., & Kumar, S. 2020. Salmonella contamination of seafood in landing centres and retail markets of Mumbai, India. Journal of AOAC International. ttps:// IF: 1.5

11. Sahna Don, Parvathi Ammini, Binaya Bhusan Nayak, Sanath H. Kumar. 2020. Survival behaviour of Salmonella enterica in fish and shrimp at different conditions of storage. LWT-Food Science and Technology: 132. 109795. IF: 4.008

12. Vinod Kumar N., Jasna Vijayan., Parvathi A. 2020. Statistical Optimization of Urease Production by Bacillus halodurans PO15 a Mangrove Bacterium Isolated from Poovar Mangroves, India Marine Life Science & Technology. 2,194–202. IF:0

13. VK Nathan, J Vijayan, Parvathi A. 2020. Comparison of bacterial diversity from two mangrove ecosystems from India through metagenomic sequencing. Regional Studies in Marine Science, 35: 462. IF: 1.462.

14. S Kumar, M Lekshmi, A Parvathi, M Ojha, N Wenzel, MF Varela. 2020. Functional and Structural Roles of the Major Facilitator Superfamily Bacterial Multidrug Efflux Pumps. Microorganisms. 8 (2), 266. IF: 4.152.

15. Aparna S, Parvathi A, Kaniyassery A. 2020. Isolation and characterization of a moderately halophilic Marinobacter phage-host system from the Arabian Sea. Environmental Monitoring and Assessment. 192 (3), 1-9. IF: 1.902.

16. Parvathi, Ammini., Jasna, V., Aswathy, V.K., Aparna, S., V.K. Nathan., R. Jyothibabu., 2020. Dominance of Wolbachia sp. in the deep-sea sediment bacterial metataxonomic sequencing analysis in the Bay of Bengal, Indian Ocean. Genomics. 112 (1), 1030-1041. IF: 6.205.

17. Vinod Kumar Nathan., Jasna Vijayan., Parvathi Ammini. 2019. Pesticide Application Inhibit the Microbial Carbonic Anhydrase Mediated Carbon Sequestration in a Soil Microcosm. Environmental Science and Pollution Research. 1-10. IF: 3.056.

18. Vinod Kumar Nathan., Parvathi Ammini. 2019. Carbon Dioxide Sequestering Ability of Bacterial Carbonic Anhydrase in a Mangrove Soil Microcosm and Its Bio-mineralization Properties. Water Air Soil Pollution 230:192. IF: 1.90
19. Kayanath S, Vinod Kumar N, Parvathi, Ammini. 2019. Antibiofilm activity of biosurfactant derived from Halomonas sp., a lipolytic bacterium from the Bay of Bengal. Microbiology. 88 (5), pp. 585–599. DOI: 10.1134/S0026261719050072. IF: 0.945

20. Vinod Kumar N, Parvathi, Ammini, Jasna Vijayan. 2019. Photocatalytic Degradation of Synthetic Dyes using Iron (III) Nanoparticles (Fe3O4 –Np) Synthesized using Rhizophora mucronata Lam. IET Nanobiotechnology. 13 (2):120-123. doi: 10.1049/iet-nbt.2018.5230 IF: 1.859

21. Aparna, S., Parvathi Ammini., A. S. Pradeep Ram., T. Sime-Ngando., 2019. Genome analysis of Marinobacter phage AS1 suggests its close interactions with host Marinobacter sp. Aquatic Microbial Ecology 83: 119–129 IF: 1.841

22. Panchami Jaya, Vinod Kumar Nathan & Parvathi Ammini. 2019. Characterization of marine bacterial carbonic anhydrase and their CO2 sequestration abilities based on a soil microcosm. Preparative Biochemistry and Biotechnology. 49(9), 891-899. doi: 10.1080/10826068.2019.1633669 IF: 1.415

23. Parvathi, Ammini. Jasna, V., Aswathy Vijaya Krishna., Vinod Kumar Nathan., Aparna S., and Balachandran, K.K. 2019. Microbial diversity in a coastal environment with co-existing upwelling and mud-banks along the south west coast of India. Molecular Biology Reports. 46(3):3113-3127 IF: 1.402

24. Jasna Vijayan, Parvathi, Ammini., Aswathy Vijaya Krishna, Aparna Sreekumar, Dayana Mathew, Aswathy Agnes Joseph, Madhu, N.V. 2019. Factors determining variations in viral abundance and viral production in a tropical estuary (Cochin estuary, India) influenced by monsoonal cycles. Regional Studies in Marine Science. Vol.28;1-10. IF: 1.462

25. Parvathi, Ammini. Jasna V Aparna S Pradeep Ram AS Aswathy VK Balachandran, K.K. Muraleedharan, K.R. Dayana M Sime Ngando T. 2018. High incidence of lysogeny in the oxygen minimum zones of the Arabian Sea (southwest coast of India). Viruses. vol.10(11); 588 IF: 3.816

26. Jasna Vijayan Parvathi Ammini. Abhinandita Dash. 2018. Genetic and functional diversity of double- stranded DNA viruses in a tropical monsoonal estuary, India. Nature Scientific Reports. vol.8(1);1-14 IF: 3.998

27. Jasna V, Pradeep Ram AS, Parvathi Ammini, Sime-Ngando T 2018. Differential impact of lytic viruses on prokaryotic morphopopulations in a tropical estuarine system (Cochin estuary, India). PLoS ONE 13(3): e0194020. 10.1371/journal.pone.0194020 IF: 2.74

28. Manjusha Lekshmi, Parvathi A, Jones Adjei, Leslie M. Sanford, Ugina Shrestha, Sanath Kumar and Manuel F. Varela. 2018. Modulation of antimicrobial efflux pumps of the major facilitator superfamily in Staphylococcus aureus. AIMS Microbiology, 4(1): 1–18. DOI: 10.3934/microbiol.2018.1.1 IF: 0

29. Aswathy VK and Parvathi A 2018. Population characteristics of Villorita cyprinoides in Vembanad Lake, India, Lake and Reservoir Management, 34:130—140.DOI: 10.1080/10402381.2017.1394941 IF:1.056

30. Manjusha Lekshmi, Parvathi A, Sanath Kumar and Manuel F. Varela. The Food Production Environment and the Development of Antimicrobial Resistance in Human Pathogens of Animal Origin. Microorganisms 2017, 5, 11; doi:10.3390/microorganisms5010011 IF:4.152

31. Jasna V, Parvathi A, Pradeep Ram AS, Balachandran KK, Madhu NV, Nair M, Jyothibabu R, Jayalakshmy KV, Revichandran C and Sime-Ngando T 2017. Viral-Induced Mortality of Prokaryotes in a Tropical Monsoonal Estuary. Frontiers in Microbiology. 8:895. doi: 10.3389/fmicb.2017.00895 IF:4.235

32. Aravind S et al.,2016. Perspectives on future Indian Ocean research from early career scientists*. Current Science.: 111, 171-1742 IF:0.725

33. Parvathi, A. Jasna vijayan Jina Sebastian Jayalakshmy, K.V. Lallu K R Madhu, N.V. Muraleedharan, K.R. Naveen kumar K R Balachandran, K.K. 2015. Effects of hydrography on the distribution of bacteria and virus in Cochin Estuary, India.
Ecological Research: 30(1); 85-92 IF:1.58

34. Parvathi, A, Zhong Xu., Pradeep Ram AS, and Jacquet S. 2014. Dynamics of auto- and heterotrophic picoplankton and associated viruses in Lake Geneva. Hydrology and Earth System Sciences. 18: 1073–1087. IF:5.153

35. Parvathi, A., Jasna, V., Haridevi, C.K., Jina, S., Greeshma, M., Breezy, J., and Nair, M. 2013. Diurnal variations in bacterial and viral production in Cochin estuary, India. Environmental Monitoring Assessment. 185: 8077-8088. IF:1.903

36. Jacquet S, Zhong Xu, Parvathi, A, and Pradeep Ram AS. 2013. First description of a cyanophage infecting the cyanobacterium Arthrospira platensis (Spirulina). Journal of Applied Phycology. 25:195–203 IF:3.044

37. Parvathi, A, Zhong Xu and Jacquet S. (2012). Dynamics of various viral groups infecting autotrophic plankton in Lake Geneva. Advances in Oceanography and Limnology 3(2): 171–191. IF: 0

38. Baby Divya, Parvathi, A., Loka Bharathi, P.A., Nair, S. 2011. 16S rRNA-based bacterial diversity in the organic-rich sediments underlying oxygen deficient waters of eastern Arabian Sea. World Journal of Microbiology and Biotechnology. 27; 2821-2833. IF:2.477

39. Parvathi A, Jasna V, Greeshma M, Preethi C. 2011. Comparative virulence genotyping and antimicrobial susceptibility profiling of environmental and clinical Salmonella enterica from Cochin, India. Current Microbiology. 62:21-26. IF:1.746

40. Parvathi A, Seetha R, Sajila MP, and Breezy J. 2011. Study of changes in bacterial and viral abundance in formaldehyde- fixed water samples by epifluorescence microscopy. Environmental Monitoring and Assessment. 177: 227-231. IF:1.903

41. Parvathi, A., Dafini Mendez, Ciana Anto. 2011. Distribution of putative virulence genes and patterns of antimicrobial drug resistance in strains of Vibrio harveyi. Indian Journal Of Microbiology. 51: 332-337. IF:0

42. Parvathi A, Krishna, K., Joseph, N., Jose, J., Nair, S., 2009. Biochemical and molecular characterization of Bacillus pumilus isolated from the coastal environment of Cochin, India Brazilian Journal of Microbiology. 40:269-275 IF:2.428

43. Kumar, S., Parvathi, A., George, J., Hernandez, R., Cadle, K.M., Varela, M.F. 2009. Identification of a novel UDP-N-acetylglucosamine enolpyruvyl transferase (MurA) from Vibrio fischeri that confers high fosfomycin resistance in Escherichia coli. Archives of Microbiology: 191: 425-429. IF:1.884

44. Parvathi, A., George, J., Kumar, S.2009. Prevalence and heterogeneity of hemolysin gene vhh among hatchery isolates of Vibrio harveyi in India. Current Microbiology 59: 42-47. IF:1.746

45. Kumar, S., Parvathi A., Krohne, G., Karunasagar, I., Karunasagar, I., 2009. A study on the effect of some laboratory derived genetic mutation on biofilm formation by Listeria monocytogenes. World Journal Of Microbiology and Biotechnology 25(3): 527-531. IF:2.477

46. Umesha, K.R., Kumar, S., Parvathi, A., Kunyarat, D., Paiboon, S., Karunasagar, I., 2008. Opisthorchis viverrini: Detection by polymerase chain reaction (PCR) in human stool samples. Experimental Parasitology. 120: 353-356. IF:1.69

47. Parvathi, A., Umesha, K.R., Kumar, H.S., Sithithaworn, P., Karunasagar, I., Karunasagar, I., 2008. Development and evaluation of a polymerase chain reaction (PCR) assay for the detection of Opisthorchis viverrini in fish. Acta Tropica. 107:13-16. IF:2.555

48. Parvathi, A., Sanath Kumar, H, Karunasagar I. and Karunasagar I. 2007. Development and laboratory evaluation of a nested Polymerase chain reaction (PCR) assay for the detection of Clonorchis sinensis. Experimental Parasitology 115(3):291-5. IF:1.69

49. Parvathi, A., Sanath Kumar, H., Bhanumathi, A., Ishibashi, M., Nishibuchi, M., Karunasagar, I. and Karunasagar I., 2006. Molecular characterization of thermostable direct haemolysin-related haemolysin (TRH)-positive Vibrio parahaemolyticus from oysters in Mangalore, India. Environmental Microbiology 8 (6): 997-1004. IF:4.933

50. Sanath Kumar, H., Parvathi, A., Karunasagar, I. and Karunasagar, I., 2006. A gyrB-based PCR for the detection of Vibrio vulnificus and its application for direct detection of this pathogen in oyster enrichment broths. International Journal of Food Microbiology 111:216-220. IF:4.187

51. Sanath Kumar, H., Parvathi, A., Karunasagar, I. and Karunasagar, I., 2005. Prevalence of Escherichia coli in tropical seafood and their antibiotic resistance. World Journal of Microbiology and Biotechnology 24 (5): 619-623. . IF:2.477

52. Parvathi, A., Sanath Kumar, H., Karunasagar, I. and Karunasagar, I., 2005. Study of prevalence of Vibrio vulnificus in oysters in India and their heterogeneity by RAPD-PCR and gyrB sequence analysis. Environmental Microbiology 7 (7): 995-1002. IF:4.933

53. Parvathi A., Kumar, H.S., Karunasagar, I. and Karunasagar, I., 2004. Detection and enumeration of Vibrio vulnificus in oysters from two estuaries along the southwest coast of India, using molecular methods. Applied and Environmental Microbiology 70: 6909-6913. IF:4.016

Book chapters
1. Adjei JA, Lakshmi M, Parvathi A et al., 2018. Molecular Biology, Biochemistry and modulation of antimicrobial transporters belonging to the major facilitator superfamily from Salmonella enterica. In book: Salmonella enterica: Molecular Characterization, Role in Infectious Diseases and Emerging Research. Chapter: 1. Publisher: Nova Science Publishers. Editors: Faruk van Doleweerd.

2. Manjusha Lekshmi, Ammini Parvathi, Sanath Kumar, and Manuel F. Varela. 2018. Efflux Pump-Mediated Quorum Sensing: New Avenues for Modulation of Antimicrobial Resistance and Bacterial Virulence. Chapter 7. Springer Nature Singapore Pte Ltd. 2018. V. C. Kalia (ed.), Biotechnological Applications of Quorum Sensing Inhibitors,

3. Sanath Kumar, Lekshmi M, Parvathi A, Nayak BB and Varela. 2017. Antibiotic Resistance in Seafood‐Borne Pathogens. In. Foodborne Pathogens and Antibiotic Resistance, Ed. Om V. Singh. John Wiley & Sons, Inc.

4. Karunasagar, I., Karunasagar, I. and Parvathi, A., 2004. Microbial safety of fishery products. In: Marine Microbiology, Facets and opportunities. N. Ramaiah (Ed.), National Institute of Oceanography, In

Research Team
Suahara Shebin A A
Hafza S
Neenu P
Paul Maina Mwangi
Shruthy P K
Courses Offered