“Passionate about Research – Science Lover… Biotechnologist but more of a Microbiologist.
Also a cynophilist, melophile and keep-fit fanatic!”


Postdoctoral Scientist

Antibiotic resistance is growing into a major global health crisis; my research focuses on using non-antibiotic agents such as bacteriophages as antibacterial agents. My research interests are towards identifying the mechanism of antibiotic resistance among nosocomial pathogens and to evaluate the potential of bacteriophages as therapeutics.

I have expertise in working with the mechanism of antibiotic resistance among Gram-negative bacteria in relation to horizontal gene transfer (HGT), and therapeutic characterization of bacteriophages for clinical applications. In the past, my research focused on studying the prevalence of carbapenem and colistin resistance, and the role of integrons in disseminating resistance. At present, working with the characterization of Escherichia, Klebsiella, Pseudomonas and Acinetobacter phages. My research is also focused towards cloning and expression of endolysin as a potential antibacterial enzyme and the role of phageome in controlling the diversity of microbiota in human and animal gut using next-generation sequencing technologies.

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Manohar P, Loh B, Namasivayam E, Loganathan A, Nachimuthu R, Leptihn S. A multiwell-plate Caenorhabditis elegans assay for assessing the therapeutic potential of Bacteriophages against Clinical Pathogens. Microbiology Spectrum. Accepted, 2022.

Manohar P, Loh B, Namasivayam E, Loganathan A, Nachimuthu R, Leptihn S. A multiwell-plate Caenorhabditis elegans assay for assessing the therapeutic potential of Bacteriophages against Clinical Pathogens. bioRxiv, 2022.

Manohar P, Royam MM, Loh B, Bozdogan B, Nachimuthu R, Leptihn S. Synergistic Effects of Phage-Antibiotic Combinations against Citrobacter amalonaticus. ACS Infectious Diseases (Ahead of press), 2022.

Loh B, Zhang L, Hua X, Yu Y, Long M, Wang X, Manohar P, Nachimuthu R, Martins WMBS, Toleman MA, Leptihn S. Complete Genome of the Virulent Klebsiella pneumoniae Phage Geezett Infecting Multidrug-Resistant Clinical Strains. Microbiology Resource Announcements. 10(48) e00685-21, 2021.

Loh B, Wang X, Hua X, Luo J, Wen T, Zhang L, Ma L, Manohar P, Nachimuthu R, Grainge I, Yu Y, Leptihn S. Complete genomes of Bacteriophages Kaya, Guyu, Kopi and TehO that target clinical strains of Pseudomonas aeruginosa. Microbiology Resource Announcements, 10(48) e01043-21, 2021.

Loh B, Wang X, Hua X, Chook HW, Ma L, Zhang L, Manohar P, Jin Y, Leptihn S. Complete Genome of the Lytic Bacteriophage Phab24 that infects Clinical Strains of the Nosocomial Pathogen Acinetobacter baumannii. Microbiology Resource Announcements, 10(40) e00669-21, 2021.

Ramesh N, Royam MM, Manohar P, Leptihn S. Application of Bacteriophages and Endolysins in Aquaculture as a Biocontrol Measure. Biological Control, 160, 104678, 2021.

Manohar P, Leptihn S, Lopes BS, Nachimuthu R. Dissemination of carbapenem resistance and plasmids encoding carbapenemases in Gram-negative bacteria isolated in India. JAC-Antimicrobial Resistance, 3(1) dlab015, 2021.

Manohar P, Nachimuthu R, Leptihn S, Anuradha R, Rudi K. Reduced Metagenomic Sequencing (RMS) Approach to Determine the Gut-Associated Phageome in Mother-Child. Human Microbiome Journal, 100078, 2021.

Loh B*, Gondil VS*, Manohar P, Khan FM, Yang H, Leptihn S. Encapsulation and Delivery of Therapeutic Phages. Applied and Environmental Microbiology, 87:e01979-20, 2020.

Loh B*, Chen J*, Manohar P, Yu Y, Hua X, Leptihn S. A Biological Inventory of Prophages in A. baumannii Genomes Reveal Distinct Distributions in Classes, Length and Genomic Positions. Frontiers in Microbiology, 11, 3055, 2020. 

Loh B*, Chen J*, Manohar P, Yu Y, Hua X, Leptihn S. A Biological Inventory of Prophages in A. baumannii Genomes Reveal Distinct Distributions in Classes, Length and Genomic Positions. bioRxiv 2020.10.26.355222, 2020. 

Manohar P, Loh B, Leptihn S. Will the overuse of Antibiotics during the Coronavirus pandemic accelerate Antimicrobial resistance? Infectious Microbes & Diseases, 2(3):87-88, 2020.

Manohar P, Loh B, Nachimuthu R, Hua X, Welburn SC, Leptihn S. Secondary Bacterial Infections in Patients with Viral Pneumonia. Frontiers in Medicine, 7, 420, 2020.

Manohar P, Loh B, Athira S, Nachimuthu R, Hua X, Welburn SC, Leptihn C. Secondary bacterial infections during pulmonary viral diseases: Phage therapeutics as alternatives to antibiotics? Frontiers in Microbiology, 11, 1434, 2020.

Nachimuthu R, Kannan VR, Bozdogan B, Krishnakumar V, Pandiyan KS, Manohar P. CTX-M-type ESBL-mediated resistance to third-generation cephalosporins and conjugative transfer of resistance in Gram-negative bacteria isolated from hospitals in Tamil Nadu, India. Access Microbiology (accepted), 2020.

Sinha A, Eniyan K, Manohar P, Ramesh N, Bajpai U. Characterization and genome analysis of B1 sub-cluster mycobacteriophage PDRPxv. Virus Research, 279, 197884, 2020. 

Manohar P and Ramesh N. Improved lyophilization conditions for long-term storage of bacteriophages. Scientific Reports, 9(1), 2019.

Manohar P, Tamhankar AJ, Lundborg CS, Nachimuthu R. Therapeutic characterization and efficacy of bacteriophage cocktails infecting Escherichia coli, Klebsiella pneumoniae and Enterobacter species. Frontiers in Microbiology,10, 574, 2019.

Manohar P, Tamhankar A J, Leptihn S, Ramesh N. Pharmacological and immunological aspects of phage therapy. Infectious Microbes & Diseases, 1:2, 2019.

Manohar P, Ragavi M, Ashby A et al. First report of blaGIM-1 in Acinetobacter variabilis isolated from hospital samples. BioRxiv, 2019. 

Shanthini T, Manohar P, Samna S et al.Emergence of plasmid-borne blaoxa-181 gene in Ochrobactrum intermedium: first report from India. Access Microbiology, 2019. 

Ramesh N, Archana L, Royam MM, Manohar P, Eniyan K. Effect of various bacteriological media on the plaque morphology of Staphylococcus and Vibrio phages. Access Microbiology, 1(4), 2019.

De S, Chaudhuri SR, Panda A, Jadhav GR, Kumar RS, Manohar P, Ramesh N et al. Synthesis, characterisation, molecular docking, biomolecular interaction and cytotoxicity studies of novel ruthenium (ii)–arene-2-heteroarylbenzoxazole complexes. New Journal of Chemistry, 8, 2019.

Manohar P,Ashok J Tamhankar, Cecilia SL, Ramesh N. Isolation, characterization and in vivo efficacy of Escherichia phage myPSH1131. PLoS One,13(10): e0206278, 2018.

Manohar P, Ramesh N, Bruno S Lopes. The therapeutic potential of bacteriophages targeting Gram-negative bacteria using Galleria mellonella infection model. BMC Microbiology, 18:97, 2018.

Manohar P, Subramanian Babu, Bulent Bozdogan et al. Identification of blaDIM-1 metallo beta-lactamase in Pseudomonas aeruginosa isolated From Tamil Nadu, India. Journal of Global Antimicrobial Resistance, 13, 7-8, 2018.

Manohar P, Nazia Hassan, Abha Kumari, Vaikhari Kale, Ramesh N. Evaluation of phenotypic methods used for the detection of carbapenemase: modified Hodge test, carbapenem inactivation method, and carbaNP test. Romanian Archives of Microbiology and Immunology. 77 (2), 141-147, 2018.

Anuradha Ravi, Ekaterina Avershina…. Manohar P, N Ramesh, Kunt Rudi. Comparison of reduced metagenome and 16S rRNA gene sequencing for determination of genetic diversity and mother-child overlap of the gut associated microbiota. Journal of Microbiological Methods, 149, 44-52,2018.

Manohar P, Thamaraiselvan Shanthini, Pandey Ekta et al. Colistin-resistant Klebsiella pneumoniae: prevalence of integrons and synergistic out turn for colistin-meropenem. Archives of Clinical Infectious Diseases, 13(1), e55099, 2018. 

Manohar P, Shanthini Thamaraiselvan, Goswami Priyanka et al. Bacterial Load and Contamination of Indian Currency Note: Isolation and Transferability Studies of Multi-Drug Resistant Bacteria. Indian Journal of Public Health Research and Development, 9(9), 2018. 

Manohar P, Thamaraiselvan Shanthini, Reethu Ann Philip et al. Role of biofilm-specific antibiotic resistance genes PA0756-0757, PA5033 and PA2070 in Pseudomonas aeruginosa. BioRxiv, 2018.

Manohar P, T Shanthini, Ramankannan A et al. The distribution of carbapenem- and colistin- resistance in Gram-negative bacteria from Tamil Nadu region in India. Journal of Medical Microbiology, 66, 874-883, 2017.

Manohar P, Shanthini T, Nitin Marathe et al. Genetic Characteristics of Plasmid-Mediated Extended Spectrum Beta-Lactamases and Its Coexistence with NDM-1 in Clinical Gram-negative Bacteria. Indian Journal of Biotechnology, 16(2), 189-194, 2017. 

Ravi A, Avershina E…. Manohar P, Padmanaban S, Ramesh N, Knut Rudi. Genetic diversity and mother-child overlap of the gut associated microbiota determined by reduced genome sequencing. BioRxiv, 2017.

Choudhary R, Manohar P, Vecstaudza J et al. Preparation of nanocrystalline forsterite by combustion of different fuels and their comparative in-vitro bioactivity, dissolution behaviour and antibacterial studies. Materials Science and Engineering C, 77, 811–822, 2017.

Manohar P, T Shanthini, KM Gothandam et al. Enhanced Amylolytic Activity of Intracellular Α-Amylase Produced By Bacillus tequilensis. The Journal of Microbiology, Biotechnology and Food Sciences, 6 (6). 1314, 2017. 

Nachimuthu R, Manohar P, Shanthini T et al. Nano-antibiotics: A therapeutic future. Nanoscience and Nanotechnology-Asia, 7 (1), 3-25, 2017. 

Ramesh N….Karthikeyan S, Manohar P, Bülent Bozdogan. Characterization of carbapenem resistant Gram negative bacteria from Tamil Nadu. Journal of Chemotherapy, 28(5), 371-374, 2016. 

Ramesh N, Manohar P, Ramkumar Subramani et al. Colistin susceptibility of Gram-negative clinical isolates in Tamil Nadu, India. Asian Biomedicine, 10(1), 1-3, 2016.

Manohar P, Gowtham Kumar, Hajarah Hussain, Benedict Paul. Distribution of virulence factors among vancomycin resistance Enterococcus faecalis from dental isolates. Asian Journal of Pharmaceutical and Clinical Research, 9 (3), 1-3, 2016.

N Ramesh, Pillai AP, Rajannambiar N, Manohar P et al. Prevalence of multi drug resistant strains on touch screen of Automated Teller Machine. Asian Journal of Pharmaceutical and Clinical Research, 8(2), 2015.

Ramesh N, Manohar P, Avani Patel et al. Screening of CTX-M type extended spectrum beta-lactamases producing clinical isolates from Tamil Nadu. Research Journal of Pharmaceutical, Biological and Chemical Sciences, 6(4), 658-62, 2015.

Manohar P, Nachimuthu R, Gothandam K.M. et al. Pseudomonas syringae: An overview and its future as a “rain making bacteria”. International Research Journal of Biological Sciences, 4(2), 70-77, 2015.

N. Ramesh, V. Drishya Nair, H. Karthiayani, Manohar P et al. Prevalence of blaNDM-1 Among Gram Negative Bacteria from Clinical Samples of Tamil Nadu. International Journal of Medico-biological Research, 1 (7), 389-393, 2014.