Jasna Kovac, Ph.D.
- Lester Earl and Veronica Casida Career Development Professor of Food Safety
- Assistant Professor of Food Science
University Park, PA 16803
- Email jzk303@psu.edu
- Office 814-865-2883
Areas of Expertise
- Microbial Food Safety
- Foodborne Pathogens
- Genomic Epidemiology
- Microbiomes in Food Systems
- Antimicrobial Resistance
Websites
Education
- BSc - University of Ljubljana (Microbiology, concentration: Microbial Biotechnology), 2011
- PhD - University of Ljubljana (Biosciences, concentration: Biotechnology), 2015
- Visiting scholar - University of Graz (Bucar lab), 2011
- Visiting scholar - Iowa State University (Zhang lab), 2012
- FEMS Fellow - Oxford University (Maiden lab), 2014
- Erasmus Fellow - University of Veterinary Medicine Vienna (Wagner lab, Stessl group), 2015
- Postdoc - Cornell University (Wiedmann lab), 2015 - 2017
Research
The goal of our research is to advance understanding of genetic and environmental factors driving:
- (i) expression of virulence factors;
- (ii) evolution of foodborne pathogens and antimicrobial resistance;
- (iii) transmission of foodborne pathogens and antimicrobial resistance.
We use a precision food safety approach, including comparative genomics and metagenomics to generate the knowledge needed for the development of effective intervention strategies leading to a safer and sustainable food supply chain.
Lab Members
Visit our lab website.
Graduate students
- Runan Yan (PhD candidate, mBiome Fellow), Food Science, dual-title degree program in Clinical and Translational Sciences
- Taejung Chung (PhD student), Food Science
- Naomi Niyah (PhD candidate), Molecular, Cellular, and Integrative Biosciences
- Laura Rolon (PhD candidate) - co-advised with R. Roberts, Food Science, dual-title degree program in International Agriculture and Development
- Priscilla Sinclair (MS student) - co-advised with L. LaBorde, Food Science
Graduate Programs
PhD Dual-Title Degree Programs
Courses
- FDSC 409 - Laboratory in Food Microbiology (Fall semester; 2 cr; next offered in FA21)
- FDSC 517 - Microbial Genomic Epidemiology (Spring semester; 3 cr; next offered in SP22)
- FDSC 497 - Microbial Whole-Genome Sequence Analyses (Spring; 1 cr; next offered in SP21)
- FDSC/INTAG 460 - Food Production in Italy (Spring break; study abroad; 1 cr; next offered in SP23 break)
- FDSC 496 - Independent Studies (all semesters; variable cr; all semesters)
- FDSC 600/MCIBS 600 - Thesis Research (all semesters, variable cr; all semesters)
- FDSC 494H - Honors Thesis - (all semesters, variable cr; all semesters)
Publications
Unique inducible filamentous motility identified in pathogenic bacillus cereus group species
ISME Journal, Liu, Martha M., Coleman, Shannon, Wilkinson, Lauren, Smith, Maren L., Hoang, Thomas, Niyah, Naomi, Mukherjee, Manjari, Huynh, Steven, Parker, Craig T., Kovac, Jasna, Hancock, Robert E.W., Gaynor, Erin C., 2020
Novel effective bacillus cereus group species "bacillus clarus" is represented by antibiotic-producing strain ATCC 21929 isolated from soil
mSphere, Méndez Acevedo, Marysabel, Carroll, Laura M., Mukherjee, Manjari, Mills, Emma, Xiaoli, Lingzi, Dudley, Edward G., Kovac, Jasna, 2020
Review of the prevalence of foodborne pathogens in milk and dairy products in Ethiopia
International Dairy Journal, Keba, Abdi, Rolon, M. Laura, Tamene, Aynadis, Dessie, Kindinew, Vipham, Jessie, Kovac, Jasna, Zewdu, Ashagrie, 2020
No assembly required: Using BTyper3 to assess the congruency of a proposed taxonomic framework for the Bacillus cereus group with historical typing methods
Frontiers in Microbiology, Carroll, Laura M., Cheng, Rachel A., Kovac, Jasna, 2020
The Composition of Microbial Communities in Six Streams, and Its Association With Environmental Conditions, and Foodborne Pathogen Isolation
Frontiers in Microbiology, Chung, Taejung, Weller, Daniel L., Kovac, Jasna, 2020
Whole-genome sequences of salmonella isolates from an ecological wastewater treatment system
Microbiology Resource Announcements, Connolly, Charles J., Kaminsky, Laura, Pinto, Gabriella N., Sinclair, Priscilla C., Bajracharya, Gyasu, Yan, Runan, Nawrocki, Erin M., Dudley, Edward G., Kovaca, Jasna, 2020
Extended enrichment procedures can be used to define false-negative probabilities for cultural gold standard methods for salmonella detection, facilitating comparisons between gold standard and alternative methods
Journal of Food Protection, Sullivan, Genevieve, Guo, Xiaodong, Tokman, Jeffrey I., Roof, Sherry, Trmcic, Aljosa, Baker, Robert C., Tang, Silin, Markwell, Peter, Wiedmann, Martin, Kovac, Jasna, 2020
Dynamic Laser Speckle Imaging Meets Machine Learning to Enable Rapid Antibacterial Susceptibility Testing (DyRAST)
ACS SENSORS, Zhou, Keren, Zhou, Chen, Sapre, Anjali, Pavlock, Jared, Weaver, Ashley, Muralidharan, Ritvik, Noble, Josh, Chung, Taejung, Kovac, J, Liu, Zhiwen, Ebrahimi, Aida, 2020
Proposal of a taxonomic nomenclature for the bacillus cereus group which reconciles genomic definitions of bacterial species with clinical and industrial phenotypes
mBio, Carroll, Laura M., Wiedmann, Martin, Kovac, Jasna, 2020
(-)-α-pinene reduces quorum sensing and campylobacter jejuni colonization in broiler chickens
PLoS One, Šimunović, Katarina, Sahin, Orhan, Kovač, Jasna, Shen, Zhangqi, Klančnik, Anja, Zhang, Qijing, Možina, Sonja Smole, 2020
Paenibacillus odorifer, the predominant Paenibacillus species isolated from milk in the United States, demonstrates genetic and phenotypic conservation of psychrotolerance but clade-associated differences in nitrogen metabolic pathways
mSphere, Beno, Sarah M., Cheng, Rachel A., Orsi, Renato H., Duncan, Diana R., Guo, Xiaodong, Kovac, Jasna, Carroll, Laura M., Martin, Nicole H., Wiedmann, Martin, 2020
The anti-campylobacter activity and mechanisms of pinocembrin action
Microorganisms, Klančnik, Anja, Šimunović, Katarina, Kovac, Jasna, Sahin, Orhan, Wu, Zuowei, Vučković, Darinka, Abram, Maja, Zhang, Qijing, Možina, Sonja Smole, 2019
A century of gray
Journal of Dairy Science, Reichler, Samuel J., Martin, Nicole H., Evanowski, Rachel L., Kovac, Jasna, Wiedmann, Martin, Orsi, Renato H., 2019
Serotype-specific evolutionary patterns of antimicrobial-resistant Salmonella enterica
BMC Evolutionary Biology, Liao, Jingqiu, Orsi, Renato Hohl, Carroll, Laura M., Kovac, Jasna, Ou, Hongyu, Zhang, Hailong, Wiedmann, Martin, 2019
A conceptual framework for developing recommendations for no-harvest buffers around in-field feces
Journal of Food Protection, Weller, Daniel L., Kovac, Jasna, Kent, David J., Roof, Sherry, Tokman, Jeffrey I., Mudrak, Erika, Wiedmann, Martin, 2019
Precision food safety
mSystems, Kovac, Jasna, 2019
Whole-genome sequences of Escherichia coli isolates from cocoa beans imported from bolivia
Microbiology Resource Announcements, Nwanosike, Hephzibah, Chung, Taejung, Xiaoli, Lingzi, Condello, Megan, Dudley, Edward G., Kovac, Jasna, 2019
Corrigendum
Frontiers in Microbiology, Beno, Sarah M., Orsi, Renato H., Cheng, Rachel A., Kent, David J., Kovac, Jasna, Duncan, Diana R., Martin, Nicole H., Wiedmann, Martin, 2019
The occurrence of Listeria monocytogenes is associated with built environment microbiota in three tree fruit processing facilities.
Microbiome, Tan, X, Chung, T, Chen, Y, Macarisin, D, LaBorde, Luke, Kovac, Jasna, 2019
Characterization of emetic and diarrheal Bacillus cereus strains from a 2016 foodborne outbreak using whole-genome sequencing: Addressing the microbiological, epidemiological, and bioinformatic challenges
Frontiers in Microbiology, Carroll, Laura M., Wiedmann, Martin, Mukherjee, Manjari, Nicholas, David C., Mingle, Lisa A., Dumas, Nellie B., Cole, Jocelyn A., Kovac, Jasna, 2019
Assembly and characterization of a pathogen strain collection for produce safety applications
Frontiers in Microbiology, Harrand, Anna Sophia, Kovac, Jasna, Carroll, Laura M., Guariglia-Oropeza, Veronica, Kent, David J., Wiedmann, Martin, 2019
Genes Associated With Psychrotolerant Bacillus cereus Group Isolates.
Frontiers in Microbiology, Beno, S, Orsi, R, Cheng, R, Kent, D, Kovac, Jasna, Duncan, D, Martin, N, Wiedmann, M, 2019
Intraclade variability in toxin production and cytotoxicity of Bacillus cereus group type strains and dairy-associated isolates
Applied and Environmental Microbiology, Miller, Rachel A., Jian, Jiahui, Beno, Sarah M., Wiedmann, Martin, Kovac, Jasna, 2018
Population structure and attribution of human clinical Campylobacter jejuni isolates from central Europe to livestock and environmental sources
Zoonoses and Public Health, Kovac, J., Stessl, B., Čadež, N., Gruntar, I., Cimerman, M., Stingl, K., Lušicky, M., Ocepek, M., Wagner, M., Smole Možina, S., 2018
Escherichia coli transfer from simulated wildlife feces to lettuce during foliar irrigation
Food Microbiology, Weller, Daniel L., Kovac, Jasna, Kent, David J., Roof, Sherry, Tokman, Jeffrey I., Mudrak, Erika, Kowalcyk, Barbara, Oryang, David, Aceituno, Anna, Wiedmann, Martin, 2017
Precision food safety
TrAC - Trends in Analytical Chemistry, Kovac, Jasna, Bakker, Henk den, Carroll, Laura M., Wiedmann, Martin, 2017
Lactococcus petauri sp. nov., isolated from an abscess of a sugar glider
International Journal of Systematic and Evolutionary Microbiology, Goodman, Laura B., Lawton, Marie R., Franklin-Guild, Rebecca J., Anderson, Renee R., Schaan, Lynn, Thachil, Anil J., Wiedmann, Martin, Miller, Claire B., Alcaine, Samuel D., Kovac, Jasna, 2017
Rapid, high-throughput identification of anthrax-causing and emetic Bacillus cereus group genome assemblies via BTyper, a computational tool for virulencebased classification of Bacillus cereus group isolates by using nucleotide sequencing data
Applied and Environmental Microbiology, Carroll, Laura M., Kovac, Jasna, Miller, Rachel A., Wiedmann, Martin, 2017
Survival of Escherichia coli on lettuce under field conditions encountered in the Northeastern United States
Journal of Food Protection, Weller, Daniel L., Kovac, Jasna, Roof, Sherry, Kent, David J., Tokman, Jeffrey I., Kowalcyk, Barbara, Oryang, David, Ivanek, Renata, Aceituno, Anna, Sroka, Christopher, Wiedmann, Martin, 2017
Genetic stability and evolution of the sigB allele, used for Listeria sensu stricto subtyping and phylogenetic inference
Applied and Environmental Microbiology, Liao, Jingqiu, Wiedmann, Martin, Kovac, Jasna, 2017
Temporal genomic phylogeny reconstruction indicates a geospatial transmission path of Salmonella cerro in the United States and a clade-specific loss of hydrogen sulfide production
Frontiers in Microbiology, Kovac, Jasna, Cummings, Kevin J., Rodriguez-Rivera, Lorraine D., Carroll, Laura M., Thachil, Anil, Wiedmann, Martin, 2017
Bacillus wiedmannii sp. nov., a psychrotolerant and cytotoxic bacillus cereus group species isolated from dairy foods and dairy environments
International Journal of Systematic and Evolutionary Microbiology, Miller, Rachel A., Beno, Sarah M., Kent, David J., Carroll, Laura M., Martin, Nicole H., Boor, Kathryn J., Kovac, Jasna, 2016
Production of hemolysin BL by Bacillus cereus group isolates of dairy origin is associated with whole-genome phylogenetic clade
BMC Genomics, Kovac, Jasna, Miller, Rachel A., Carroll, Laura M., Kent, David J., Jian, Jiahui, Beno, Sarah M., Wiedmann, Martin, 2016
Antibiotic resistance modulation and modes of action of (-)-α-Pinene in Campylobacter jejuni
PLoS One, Kovač, Jasna, Šimunović, Katarina, Wu, Zuowei, Klančnik, Anja, Bucar, Franz, Zhang, Qijing, Možina, Sonja Smole, 2015
Virulence and antimicrobial resistance determinants of verotoxigenic Escherichia coli (VTEC) and of multidrug-resistant E. coli from foods of animal origin illegally imported to the EU by flight passengers
International Journal of Food Microbiology, Nagy, B., Szmolka, A., Smole Možina, S., Kovač, J., Strauss, A., Schlager, S., Beutlich, J., Appel, B., Lušicky, M., Aprikian, P., Pászti, J., Tóth, I., Kugler, R., Wagner, M., 2015
Natural Products as Antibacterial Agents — Antibacterial Potential and Safety of Post-distillation and Waste Material from Thymus vulgaris L., Lamiaceae, Gavaric, N, Kovac, Jasna, Kretschmer, N, Kladar, N, Smole Mozina, S, Bucar, F, Bauer, R, Bozin, B, 2015
High genetic similarity of ciprofloxacin-resistant Campylobacter jejuni in central Europe
Frontiers in Microbiology, Kovač, Jasna, Čadež, Neža, Stessl, Beatrix, Stingl, Kerstin, Gruntar, Igor, Ocepek, Matjaž, Trkov, Marija, Wagner, Martin, Možina, Sonja Smole, 2015
The evidence for clonal spreading of quinolone resistance with a particular clonal complex of Campylobacter jejuni
Epidemiology and Infection, Kovač, J., Čadež, N., Lušicky, M., Nielsen, E. Møller, Ocepek, M., Raspor, P., Smole Možina, S., 2014
Characterization of egg laying hen and broiler fecal microbiota in poultry farms in Croatia, Czech Republic, Hungary and Slovenia
PLoS One, Videnska, Petra, Rahman, Md Masudur, Faldynova, Marcela, Babak, Vladimir, Matulova, Marta Elsheimer, Prukner-Radovcic, Estella, Krizek, Ivan, Smole-Mozina, Sonja, Kovac, Jasna, Szmolka, Ama, Nagy, Bela, Sedlar, Karel, Cejkova, Darina, Rychlik, Ivan, 2014
Identification and characterisation of new Campylobacter group III phages of animal origin
FEMS Microbiology Letters, Janež, Nika, Kokošin, Andreja, Zaletel, Eva, Vranac, Tanja, Kovač, Jasna, Vučković, Darinka, Možina, Sonja Smole, Serbec, Vladka Curin, Zhang, Qijing, Accetto, Tomaž, Podgornik, Aleš, Peterka, Matjaž, 2014
Antimicrobial and resistance modulatory activity of alpinia katsumadai seed phenolic extract, essential oil and post-distillation extract
Food Technology and Biotechnology, Kovac, Jasna, Gavarić, Neda, Bucar, Franz, Možina, Sonja Smole, 2014
Anti-Campylobacter and resistance-modifying activity of Alpinia katsumadai seed extracts
Journal of Applied Microbiology, Klančnik, A., Gröblacher, B., Kovac, Jasna, Bucar, F., Možina, S. Smole, 2012
Antimicrobial activity of polysaccharides extracted from medicinal mushrooms on Campylobacter jejuni and Staphylococcus aureus, Kovač, Jasna, Klaus, Anita, Kozarski, Maja, Nikšić, Miomir, Raspor, Peter, Možina, Sonja Smole, 2012
