• Srpsko lekarsko društvo
• Udruženje mikrobiologa Srbije
• Federacija evropskih udruženja mikrobiologa (eng. Federation of European Microbiological Societies, FEMS)
• Član FEMS-ovog komiteta za organizaciju sastanaka
• Član organizacionih komiteta međunarodnih konferencija: FEMS Conference 2020; 11^th Serbian Microbiologists Congress2017, 12^th Serbian Microbiologists Congress-Micromed 2018 Regio
• Član naučnog komiteta konferencija: 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   Tromesečni boravak u Parizu, Francuska; oblast – clustered regularly interspaced short palindromic repeats (CRISPR) typing of Streptococcus agalactiae; National Reference Center for streptococci; University hospital Paris Centre

2014   Jednomesečni boravak u Ahenu, Nemačka; oblast – molecular typing of Streptococcus pneumoniae; University Hospital Aachen

2012   Boravak u trajanju od jedne nedelje u Ljubljani, Slovenija; oblast – serotyping of Streptococcus pneumoniae by using Quellung reaction; Public Health Institute

2022   FEMS grant for Summer School on Microbiology Education; Grčka

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

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. Glazgov, Škotska, 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. Valensija, Španija, 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 –                 An evolutionary insight into molecular diversity of emerging pathogens in Serbia through phylogenetic approach (IN-DEPTH); Fond za nauku Republike Srbije

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; Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije i Nacionalne akademije Belorusije

2011 – 2021        National Research Project “Bacteria resistant to antibiotics in Serbia: phenotypic and genotypic characterisation“ (No. 175039); Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije

2017 – 2021             Uža specijalizacija iz Bakteriologije; Medicinski fakultet, Univerziteta u Beogradu

2012 – 2016             Specijalizacija iz Medicinske mikrobiologije; Medicinski fakultet, Univerziteta u Beogradu; ocena 5/5

2009 – 2014             Doktorske studije iz oblasti molekularne medicine, Medicinski fakultet, Univerziteta u Beogradu; tema doktorske disertacije “Fenotipske i genotipske karakteristike i klonska povezanost faringealnih izolata grupe A streptokoka rezistentnih na makrolide u Srbiji”

1999 – 2006             Integrisane akademske studije Medicine, Medicinski fakultet, Univerziteta u Beogradu, prosečna ocean 9,29/10