Coordination and realization of research activities concerning carbapenem-resistant Gram-negative bacteria












SKILLSAbout Ina Gajić

Engage in routine microbiological diagnosis, medical student education at the undergraduate and graduate levels, and scientific research. She has experience with study planning and conducting research activities, performing both molecular and conventional microbiological techniques, as well as data processing and reporting.

Certificate courses:
2008      Good Clinical Practice (GCP)
2006      Introduction into Clinical Trials; Speaking in Front of an Audience; Publications, Drug safety and pharmacovigilance

Languages: english (fluent), french (intermediate level), italian (basic level); computer skills: MS Office


Ina Gajic is an Assistant Professor in Microbiology and Clinical Microbiology at the Faculty of Medicine, University of Belgrade. She is a member of the National Reference Laboratory for streptococci. Her research interests include molecular mechanisms of antimicrobial resistance, virulence factors and genetic relatedness of invasive and multidrug-resistant Gram-positive and Gram-negative bacteria. She was a mentor or member of commission for the assessment and defense of five master thesis, as well as a mentor of 13 research works presented at national and international conferences. Ina Gajic has been invited speaker at international conferences in 2020 (Molecular insight into the antimicrobial resistance of group B streptococci, serotype distribution and emerging serotype III sequence type 17. FEMS Conference 2020. Belgrade, Serbia) and in 2017 (Invasive group B streptococcal disease: the emergence of the hypervirulent clone ST-17. 10th Balkan congress of microbiology. Sofia, Bulgaria). She has contributed to many international journals and conference proceedings as a reviewer.

  • Serbian Medical Society
  • Serbian Society for Microbiology
  • Federation of European Microbiological Societies (FEMS)
  • Member of the FEMS Event Committee
  • Member of the Organising Commetee of the following meetings: FEMS Conference 2020; 11th Serbian Microbiologists Congress2017, 12th Serbian Microbiologists Congress-Micromed 2018 Regio
  • Member of the Scientific Committee of the third Global Students’ Conference of Biomedical Sciences, 2016 and the fourth Global students Conference of Biomedical Sciences, 2017
  1. Gajic I, Jovicevic M, Milic M, Kekic D, Opavski N, Zrnic Z, Dacic S, Pavlovic L, Mijac V. Clinical and molecular characteristics of OXA-72-producing Acinetobacter baumannii ST636 outbreak at a neonatal intensive care unit in Serbia. J Hosp Infect. 2021;112:54-60.
  2. Kekic D*, Gajic I*, Opavski N, Kojic M, Vukotic G, Smitran A, Boskovic L, Stojkovic M, Ranin L. Trends in molecular characteristics and antimicrobial resistance of group B streptococci: a multicenter study in Serbia, 2015-2020. Sci Rep. 2021;11(1):540.
  3. Lukovic B*, Gajic I*, Dimkic I, Kekic D, Zornic S, Pozder T, Radisavljevic S, Opavski N, Kojic M, Ranin L. The first nationwide multicenter study of Acinetobacter baumannii recovered in Serbia: emergence of OXA-72, OXA-23 and NDM-1-producing isolates. Antimicrob Resist Infect Control. 2020;9(1):101.
  4. Radovanovic RS, Savic NR, Ranin L, Smitran A, Opavski NV, Tepavcevic AM, Ranin J, Gajic I. Biofilm Production and Antimicrobial Resistance of Clinical and Food Isolates of Pseudomonas Curr Microbiol. 2020;77(12):4045-4052.
  5. Gajic I, Ranin L, Kekic D, Opavski N, Smitran A, Mijac V, Jovanovic S, Hadnadjev M, Travar M, Mijovic G. Tigecycline susceptibility of multidrug-resistant Acinetobacter baumannii from intensive care units in the western Balkans. Acta Microbiol Immunol Hung. 2020;67(3):176-181.
  6. Gajic I, Plainvert C, Kekic D, Dmytruk N, Mijac V, Tazi A, Glaser P, Ranin L, Poyart C, Opavski N. Molecular epidemiology of invasive and non-invasive group B Streptococcus circulating in Serbia. Int J Med Microbiol. 2019;309(1):19-25.
  7. Gajic I, Mijac V, Ranin L, Grego E, Kekic D, Jegorovic B, Smitran A, Popovic S, Opavski N. Changes in Macrolide Resistance Among Group A Streptococci in Serbia and Clonal Evolution of Resistant Isolates. Microb Drug Resist. 2018;24(9):1326-1332.
  8. Opavski N, Gajic I, Borek AL, Obszańska K, Stanojevic M, Lazarevic I, Ranin L, Sitkiewicz I, Mijac V. Molecular characterization of macrolide resistant Streptococcus pyogenes isolates from pharyngitis patients in Serbia. Infect Genet Evol. 2015;33:246-52. ISSN: 1567-1348
  9. Gajic I, Mijac V, Stanojevic M, Ranin L, Smitran A, Opavski N. Typing of macrolide resistant group A streptococci by random amplified polymorphic DNA analysis. Eur Rev Med Pharmacol Sci. 2014;18(19):2960-5.
  10. Mijac V, Opavski N, Markovic M, Gajic I, Vasiljevic Z, Sipetic T, Bajcetic M. Trends in macrolide resistance of respiratory tract pathogens in the paediatric population in Serbia from 2004 to 2009. Epidemiol Infect. 2015;143(3):648-52.

2015   Three monts stay in Paris, France; work on the clustered regularly interspaced short palindromic repeats (CRISPR) typing of Streptococcus agalactiae; National Reference Center for streptococci; University hospital Paris Centre

2014   One month stay in Aachen, Germany; work on molecular typing of Streptococcus pneumoniae; University Hospital Aachen

2012   One week stay in Ljubljana, Slovenia; work on serotyping of Streptococcus pneumoniae by using Quellung reaction; Public Health Institute


2019   FEMS grant for Summer School for Postdocs; Biological robustness: evolution of bacterial resistance to death; Mediterranean Institute for Life Sciences (MedILS), Split, Croatia

2019   FEMS Congress participation grant: Gajic I. et al. Prevalence of Ambler class A, B, and D beta-lactamases among clinical and nonclinical isolates of Pseudomonas aeruginosa in Serbia. 8th Congress of European Microbiologists. 7-11 July, 2019. Glasgow, Scotland, PM310.

2018   FEMS Congress participation grant: Gajic I. et al. Antimicrobial susceptibility patterns of Gram-negative bacteria isolated from patients admitted to tertiary care hospitals in Serbia. FEMS supported Symposium “Emerging Infections” and 6th Congress of the Microbiologists of Macedonia with international participation

2017   FEMS Congress participation grant: Gajic I. et al. emm type distribution of macrolide resistant group A streptococci isolated from patients with acute pharyngitis (2008-2014). 7th Congress of European Microbiologists. 9-13 July, 2017. Valencia, Spain, FEMS7-1404

2015   FEMS Research grant: Clustered regularly interspaced short palindromic repeats (CRISPR) typing of Streptococcus agalactiae; National Reference Center for streptococci; University hospital Paris Centre


2019-2021          An evolutionary insight into molecular diversity of emerging pathogens in Serbia through phylogenetic approach (IN-DEPTH); Science Fund of the Republic of Serbia

2021-2023          Phenotypic and genotypic characterization of invasive and noninvasive Streptococcus pneumoniae isolated from both children and adults before and after the introduction of 10-valent pneumococcal conjugate vaccine in Serbia; Merck Sharp & Dohme (MSD)

2018-2021          Development of new antimicrobial materials based on chitosan-Ag nanocomposites with antibiotics with improved antibacterial properties for use in medicine and veterinary; Ministry of Education, Science and Technical Development of the Republic of Serbia and National Academy of Sciences of Belarus

2011-2021          National Research Project “Bacteria resistant to antibiotics in Serbia: phenotypic and genotypic characterisation“ (No. 175039); Ministry of Education, Science and Technical Development of the Republic of Serbia


2017 – ongoing       Subspecialization in Bacteriology; Faculty of Medicine, University of Belgrade

2012 – 2016             Specialization in Medical microbiology; Faculty of Medicine, University of Belgrade; average grade 5/5

2009 – 2014             Ph.D. studies; module Molecular medicine, Faculty of Medicine, University ofBelgrade; title of Ph.D. thesis “Phenotypic and genotypic characterization and clonal relatedness of pharyngeal isolates of group A streptococci resistant to macrolides in Serbia”

1999 – 2006             Integrated academic studies of Medicine, Faculty of Medicine, University of Belgrade, average grade 9,29/10