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undergraduate thesis
Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2020. urn:nbn:hr:159:495945
Petrinić, Andrea
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Biochemical Engineering
Laboratory for Antibiotic, Enzyme, Probiotic and Starter Cultures Technology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

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Petrinić, A. (2020). Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:495945

Petrinić, Andrea. "Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2020. https://urn.nsk.hr/urn:nbn:hr:159:495945

Petrinić, Andrea. "Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2020. https://urn.nsk.hr/urn:nbn:hr:159:495945

Petrinić, A. (2020). 'Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 24 January 2025, https://urn.nsk.hr/urn:nbn:hr:159:495945

Petrinić A. Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2020 [cited 2025 January 24] Available at: https://urn.nsk.hr/urn:nbn:hr:159:495945

A. Petrinić, "Osjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:159:495945

Metadata
TitleOsjetljivost odabranih komensalnih bakterija iz mikrobiote majčinog mlijeka na antibiotike
Title (english)The antibiotic susceptibility of selected commensal bacteria isolated from the human milk microbiota
AuthorAndrea Petrinić
MentorJasna Novak (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Biochemical Engineering)
(Laboratory for Antibiotic, Enzyme, Probiotic and Starter Cultures Technology)
Zagreb
Defense date and country2020-07-01, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Nutrition
Abstract
Majčino mlijeko je optimalna prehrana za novorođenče i izvor je esencijalnih nutrijenata, brojnih bioaktivnih sastojaka i prve mikrobiote koja kolonizira gastrointestalni trakt dojenčeta. Kako mikrobiota majčinog mlijeka ima presudnu ulogu u razvoju i zdravlju novorođenčeta, značajno je ispitati moguću pojavu antibiotičke rezistencije kod komensalnih bakterija. Stoga je cilj ovog rada bio ispitati osjetljivost odabranih sojeva komensalnih bakterija iz mikrobiote majčinog mlijeka na 9 različitih antibiotika metodom difuzije u agar. Za 25 komensalnih bakterija su pomoću E-testa određene i vrijednosti minimalne inhibicijske koncentracije (MIC) antibiotika. Metodom lančane reakcije polimeraze identificirani su geni koji kodiraju za rezistenciju na antibiotike. Iako je primjenom fenotipskih metoda ustanovljeno da većina antibiotika nije inhibirala rast komensalnih bakterija, primjenom PCR metode nisu detektirani amplikoni koji bi upućivali na prisutnost genetičkih determinanti antibiotičke rezistencije. Utvrđena je prisutnost rezistencije na vankomicin kod Lactobacillus sojeva, koja je karakteristična za bakterije iz ovog roda, a radi se o urođenoj rezistenciji. Kako je u genomu svih sojeva Staphylococcus epidermis AF4, AF5, MB6, MB12 i RS8 te kod Streptococcus oralis subsp. dentisani MB5, nakon PCR reakcije detektirana specifična DNA vrpca veličine 297 pb koja ukazuje na prisutnost bla gena, isključeni su iz daljnjih istraživanja.
Abstract (english)
Human breast milk is the optimal nutrition for infants, representing a rich source of the essential nutrients and diversity of bioactive compounds, as well as the child´s first intestinal microbiota. As the microbiota of breast milk plays a significant role in the development and health of the newborns, characterization of the antibiotic susceptibility profiles of commensal bacteria from the human milk microbiota is essential. Therefore, the present work aimed to examine the susceptibility of selected strains of commensal bacteria isolated from breast milk microbiota to different antibiotics by the disk diffusion agar method. For 25 commensal bacteria, the values of the minimum inhibitory concentration (MIC) of antibiotics were determined by the E - test. Antibiotic resistance genes were identified by the polymerase chain reaction (PCR) method. Although phenotypic methods showed that most of the antibiotics do not inhibit the growth of commensal bacteria, the amplicons that would indicate the presence of antibiotic resistance determinants were not detected by PCR. Lactobacillus strains were not susceptible to vancomycin, which is typical for bacteria of this genus, which is described as innate resistance. The genome of all Staphylococcus epidermis AF4, AF5, MB6, MB12 and RS8 and Streptococcus oralis subsp. dentisani MB5, appeared to cotain bla gene encoding the enzyme β-lactamase according to the presence of a specific band of 297 bp detected after PCR.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:495945
Study programmeTitle: Nutrition
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) nutricionizma (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) nutricionizma)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) icon
Created on2020-07-14 12:39:11