Maja_Velhner

Maja Velhner (Gagic), D.V.M., M.Sc. Ph.D.

Principal Research Fellow

Department of Clinical Bacteriology, Mycology and Parasitology

E-mail:maja@niv.ns.ac.rs

Phone: +381 21 4895 393

Маја Велхнер

Curriculum Vitae

Maja Velhner (Gagic), D.V.M., M.Sc. PhD

Principal research fellow

Born: 1961, Belgrade, Republic of Serbia

Scientific field: Microbiology

Education: Graduated at the Faculty of Veterinary Medicine, University of Belgrade, 1985.

Master thesis:

Faculty of Veterinary Medicine, University of Belgrade, 1989

Field: Immunology/Microbiology

Title: “”Inhibition of leukocyte migration as an indicator of cell mediated immunity in poultry”, Faculty of Veterinary Medicine, University of Belgrade, 1989.

Doctoral thesis:

The Faculty of Veterinary Medicine, University of Belgrade, 1994.

Field: Microbiology/Virology

Title: “The study of diagnostic values of different laboratory methods for detection of poultry infection with Marek’s disease virus” Faculty of Veterinary Medicine, University of Belgrade, 1994.

Scientific titles:

1995 Research Fellow
2000 Senior Research Fellow
2005 Principal Research Fellow

Professional Experience:

1985-1993 Research Associate in the Department for Poultry Health Protection, Scientific Veterinary Institute “Novi Sad”, Novi Sad
1994-1996 Research Fellow, Laboratory of Virology, Scientific Veterinary Institute “Novi Sad”, Novi Sad
1996-1998 Post doctoral education at the University of Minnesota, USA, Laboratory for Pathobiology (Professor Jagdev M Sharma)
1998 – 2002 Senior Research Fellow, Department for Laboratory Examination, Virology laboratory, Scientific Veterinary Institute “Novi Sad”, Novi Sad
Since 2005 Principal Research Fellow, Department for Laboratory Diagnostic, Scientific Veterinary Institute “Novi Sad”, Novi Sad

Basic Research interest:

Bacteriology, resistance to antimicrobial agents and mechanisms of resistance, Veterinary virology, food and environmental microbiology.

Main working and research activities:

Research on biological features of animal viruses and development of diagnostic methods
Research on molecular epidemiology and mechanism of resistance in bacteria

National Projects funded by the Ministry of Education, Science and Technological Development.

Project Number TR 31071: “Investigation of pharmacological characteristics of antimicrobial agents, establishment of new technological solutions and alternative methods of prophylaxis with the goal to improve the control of infectious diseases in farm animals”
Project number TR31084:”Monitoring of health of wild animals and establishment of new biotechnological methods for detection of infectious and zoonotic agents, analysis of risks for public health and for the health of farm animals, wildlife and environment”

Projects funded by the Secretariat for Science and Technological Development of the Province of Vojvodina

Project number 114-451-3614/2010-02 and 114-451-3802/2011:” Research on resistance to fluoroquinolones in Salmonella Infantis isolates from humans, food and poultry”, Project coordinator Maja Velhner.
Project number 114-451-1233/2014-01:” Research on mechanisms of resistance to antibiotics in Escherichia coli and Salmonella spp.” Project coordinator Dubravka Milanov.

Vouchers:

„Agroprodukt“ Šinković, Bečej
„The use of probiotics to improve health status and production perfomanses in breeder flocks“, 2018, Coordinator Vladimir Polaček, Participants: Maja Velhner, Dubravka Milanov, Dalibor Todorović.
„Agropapuk“ DOO, Kukuljevci
“Management analysis of slaughter process by using model of resistotyping of Escherichia coli”, 2020, Coordinator: Dragana Ljubojević Pelić, Participants: Maja Velhner, Miloš Pelić, Suzana Vidaković Knežević, Dalibor Todorović, Bojana Prunić.
„Agroprodukt“ Šinković, Bečej
“Establishing bio-safety in hatchery to prevent Salmonella spp contamination”, 2021, Coordinator: Dalibor Todorović, Participants: Maja Velhner, Marko Pajić, Bojana Prunić, Slobodan Knežević.

Participation in Scientific Symposiums:

6 International Symposiums
20 National Symposiums

Memberships:

Veterinary Chamber

Trainings:

University of Minnesota, Laboratory for Pathobiology, mentor Professor Jagdev M Sharama, September-July 1996-1998.

Visitor Scientist, Veterinary Research Institute Budapest Hungary, mentor Professor Béla Lomniczi, 1996, 2000, 2001, 2002.

Current position:

Principal research fellow, Laboratory for Bacteriology, Mycology and Parasitology, Scientific Veterinary Institute “Novi Sad”, Novi Sad, Serbia

Address and contacts:

Scientific Veterinary Institute “Novi Sad”, Novi Sad, Serbia, Rumenački put 20, 2100 Novi Sad, Serbia

E-mail: maja@niv.ns.ac.rs; maja.velhner@yahoo.com

Phone:+381214895393

https://niv.ns.ac.rs/en/team/maja-velhner

References

Chosen references:

Branko Jovčić, Milka Malešević, Milan Kojić, Nataša Galić, Dalibor Todorović, Dejan Vidanović, Maja Velhner: Genomic Analysis of Multidrug-Resistant Salmonella enterica Serovar Kentucky Isolates from Humans, Turkey, and Food in the Republic of Serbia. Foodborne Pathog Dis. 2022 Jun 24. doi: 10.1089/fpd.2022.0029
Maja Velhner, Dalibor Todorović, Katarina Novović, Branko Jovčić, Gospava Lazić, Milan Kojić, Corinna Kehrenberg: Characterization of antibiotic resistance in Escherichia coli isolates from Black-headed gulls (Larus ridibundus) present in the city of Novi Sad, Serbia. Vet Res Commun. 2021 Dec;45(4):199-209. doi: 10.1007/s11259-021-09801-7.
Gordana Kozoderović, Dalibor Todorović, Milan Đilas, Brankica Kartalović, Maja Velhner: White-tailed eagles (Haliaeetus albicilla) in protected Danube wetlands as carriers of Escherichia coli with resistance and virulence genes. European Journal of Wildlife Research, 67:103, 2021. DOI:10.1007/s10344-021-01547-6.
Branko Jovčić, Katarina Novović, Brankica Filipić, Maja Velhner, Dalibor Todorović, Kazimir Matović, Zoran Rašić, Sonja Nikolić, Ferenc Kiškarolj, Milan Kojić: Genomic Characteristics of Colistin-Resistant Salmonella enterica subsp. enterica Serovar Infantis from Poultry Farms in the Republic of Serbia.. Antibiotics (Basel). 2020 Dec 10;9(12):886. doi: 10.3390/antibiotics9120886.
M. Velhner, D. Todorović, T. Cerar Kišek, D. Ljubojević, V. Cvitković Špik, M. Pajić, G. Kozoderović: Characterisation of multidrug resistant Escherichia coli from poultry litter and poultry carrying virulence genes for evaluation of poultry farm management.. Europ. Poult. Sci. 84, 2020, doi: 10.1399/eps.2020.296.
Velhner M, Todorović D, Grego E, Jovčić B, Prunić B, Stojanov I, Kehrenberg C. Fluoroquinolone-resistant and extended-spectrum beta-lactamase producing Escherichia coli isolates from free-living wild animals. Vet Microbiol. 2018 Sep;223:168-172. doi: 10.1016/j.vetmic.2018.08.011.
Dalibor Todorović, Maja Velhner, Edita Grego, Dejan Vidanović, Dubravka Milanov, Dejan Krnjaić, Corinna Kehrenberg: Molecular Characterization of Multidrug-Resistant Escherichia coli Isolates from Bovine Clinical Mastitis and Pigs in the Vojvodina Province, Serbia.. Microb Drug Resist. 2018 Jan/Feb;24(1):95-103. doi: 10.1089/mdr.2017.0016. Epub 2017 May 18.
М. Dačič, R. Resanović, Z. Rašić, M. Valčić, A. Milovanović, M. Velhner: Efficacy of recombinant VAXXITEK HVT-IBDv vaccine against very virulent Infectious bursal disease virus (vvIBDv) challenge in layer chicks: A pilot study. Journal of the Hellenic Veterinary Medical Society, Vol. 69 No. 1 (2018), https://doi.org/10.12681/jhvms.16434.
М. Velhner, D. Milanov, G. Kozoderović: Salmonella spp. in poultry: a constant challenge and new insights. Journal of the Hellenic Veterinary Medical Society. Vol. 69 No. 2 (2018), doi.org/10.12681/jhvms.18012.
Jasna Mirko Kureljusić, Marko Predrag Dmitrić, Dejan Svetislav Vidanović, Vlado Božidar Teodorović, Branislav Ilija Kureljušić, Velhner Josip Maja, Neđeljko Ratko Karabasil: Prevalence of Salmonella enterica in slaughtered pigs in Serbia: Serotyping, PFGE-genotyping and antimicrobial resistance.. J Infect Dev Ctries. 2017 Sep 5;11(8):640-645. doi: 10.3855/jidc.9311.
Bojana Prunić, Dubravka Milanov, Maja Velhner, Marko Pajić, Ljiljana Pavlović, Dušan Mišić: Clonal persistence of Salmonella enterica serovars Montevideo, Tennessee, and Infantis in feed factories.. J Infect Dev Ctries. 2016 Jun 30;10(6):662-6. doi: 10.3855/jidc.7313.
Velhner Maja: Mechanisms of resistance to quinolones and epidemiological significance of Salmonella spp. Acta Veterinaria-Beograd, 2016, 66 (2), 147-159.
Todorović Dalibor, Velhner Maja, Milanov Dubravka, Vidanović Dejan, Suvajdžić Ljiljana, Stojanov Igor, Krnjaić Dejan: Characterization of tetracycline resistance of Salmonella enterica subspecies enterica serovar Infantis isolated from poultry in the Northern part of Serbia.. Acta Veterinaria-Beograd, 2015, (65), 4: 548- 556, https://doi.org/10.1515/acve-2015-0046.
Ivan Dobrosavljević, Dejan Vidanović, Maja Velhner, Biljana Miljković, Branko Lako: Simultaneous detection of vaccinal and field infectious bursal disease viruses in layer chickens challenged with a very virulent strain after vaccination.. Acta Vet Hung. 2014 Jun;62(2):264-73. doi: 10.1556/AVet.2014.003.
М. Velhner, G. Kozoderović, E. Grego, N. Galić, I. Stojanov, Z. Jelesić, C. Kehrenberg: Clonal spread of Salmonella enterica serovar Infantis in Serbia: acquisition of mutations in the topoisomerase genes gyrA and parC leads to increased resistance to fluoroquinolones. Zoonoses Public Health. 2014 Aug;61(5):364-70. doi: 10.1111/zph.12081.
Gordana Kozoderović, Maja Velhner, Zora Jelesić, Nataša Golić, Jelena Lozo, Corinna Kehrenberg: Prevalence of quinolone resistance and mutations in the topoisomerase genes in Salmonella enterica serotype Enteritidis isolates from Serbia.. Int J Antimicrob Agents. 2012 Nov;40(5):455-7. doi: 10.1016/j.ijantimicag.2012.07.012. Epub 2012 Sep 20.
G. Kozoderović, M. Velhner, Z. Jelesić, I. Stojanov, T. Petrović, D. Stojanović, N. Golić: Molecular typing and antimicrobial resistance of Salmonella Enteritidis isolated from poultry, food, and humans in Serbia. Folia Microbiol (Praha). 2011 Jan;56(1):66-71. doi: 10.1007/s12223-011-0003-7.
Maja Velhner, Drako Mitevski, Dubravka Potkonjak, Dragica Stojanović, Mira Kovačević, Tamaš Petrović, Sanja Aleksić-Kovačević: Biological properties of a naturally attenuated infectious bursal disease virus isolated from a backyard chicken flock. Acta Vet Hung. 2010 Dec;58(4):499-509. doi: 10.1556/AVet.58.2010.4.10.
Judit Iván, Maja Velhner, Krisztina Ursu, Péter German, Tamás Mató, Csaba Nick Drén, János Mészáros: Delayed vaccine virus replication in chickens vaccinated subcutaneously with an immune complex infectious bursal disease vaccine: quantification of vaccine virus by real-time polymerase chain reaction. J. Can J Vet Res. 2005, 69(2): 135–142.
Enikȍ Wehmann, Dorina Ujvári, H Mazija, Maja Velhner, Irena Ciglar-Grozdanić, V Savić, Gordana Jermolenko, Željko Čač, Estela Prukner-Radovčić, B Lomniczi: Genetic analysis of Newcastle disease virus strains isolated in Bosnia-Herzegovina, Croatia, Slovenia and Yugoslavia, reveals the presence of only a single genotype, V, between 1979 and 2002.. Vet Microbiol. 2003 Jul 30;94(4):269-81. doi: 10.1016/s0378-1135(03)00133-0.
IJ Kim, M Gagic, JM Sharma: Recovery of antibody-producing ability and lymphocyterepopulation of bursal follicles in chickens exposed toinfectious bursal disease virus.. Avian Dis. 1999 Jul-Sep;43(3):401-13.
Maja Gagic, Catherine A. St. Hill, J.M. Sharma: In ovo vaccination of specific-pathogen-free chickens with vaccines containing multiple agents. Avian Dis. 1999 Apr-Jun;43(2):293-301.
Ivana Kovincic, Ivica F Vujicic, Melina Svabic-Vlahovic, Mirjana Vulic, Maja Gagic, Irene V Wesley: Survival of Listeria monocytogenes During the Manufacture and Ripening of Trappist Cheese. J Food Prot. 1991 Jun;54(6):418-420. doi: 10.4315/0362-028X-54.6.418.
I Kovincić, B Stajner, IF Vujicić, M Svabić-Vlahović, M Mrdjen, M Galić, M Gagić, JH Bryner: Comparison of allergenic skin test with serological and bacteriological examinations of cattle for Listeria monocytogenes.. Acta Microbiol Hung. 1990;37(1):131-3.

Book chapters

Maja Velhner, Dejan Vidanović, Ivan Dobrosavljević: Infectious Bursal Disease Virus,. Molecular Detection of Animal Viral Pathogens, CRC Press, Edited By Dongyou Liu, 2016.
Maja Velhner, Dragica Stojanović: Mutational polymorphism in the bacterial topoisomerase genes driven by treatment with quinolones. Point Mutation, InTech, Rijeka, Croatia, Edited by Colin Logie, 2012.

Technical documentation

Title: „Investigation of the role of the efflux pump in development of resistance to (fluoro)quinolones in Salmonella.”
Authors: Maja Velhner, Dubravka Milanov, Gordana Kozoderović, Jelena Petrović, Radomir Ratajac, Sara Savić, Dalibor Todorović.
Year of publication: 2014.
Title: „Resistance gene detection in Gram-negative bacteria by polymerase chain reaction“.
Authors: Maja Velhner, Dalibor Todorović, Dubravka Milanov, Sara Savić, Igor Stojanov, Radomir Ratajac, Dejan Krnjaić.
Year of publication: 2015.
Title: A test on a microdilution plates to establish production of a biofilm in isolates from the family of Enterobacteriaceae (Salmonella spp. i Escherichia coli).
Authors: Dubravka Milanov, Maja Velhner, Milica Živkov-Baloš, Ivana Čabarkapa, Bojana Prunić.
Year of publication: 2015
Title: „ Determination of resistance and virulence genes in Escherichia coli isolates in order to establish the quality of the management in poultry farms“.
Authors: Maja Velhner, Dalibor Todorović, Ljiljana Suvajdžić, Gordana Kozoderović, Dubravka Milanov, Radomir Ratajac, Jelena Petrović.
Year of publication: 2018.

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