| Basic data |
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| OCA1. Surname awarded to the assessed person | Gregová |
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| OCA2. Name awarded to the assessed person | Gabriela |
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| OCA3. Degrees awarded to the assessed person | Assoc. prof. , DVM, PhD |
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| OCA4. Hyperlink to the entry of the person in the Register of university staff | https://www.portalvs.sk/regzam/detail/6132 |
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| OCA5. Area of assessment | study programme feed and foodstuff safety · I. degree |
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| OCA6. Category of the research/artistic/other output | scientific output |
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| OCA7. Year of publication of the research/artistic/other output | 2025 |
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| OCA8. ID of the record in the Central Registry of Publication Activity (CRPA) or the Central Registry of Artistic Activity (CRAA) | ID: 1340279 |
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| OCA9. Hyperlink to the record in CRPA or CRAA | https://app.crepc.sk/?fn=detailBiblioForm&sid=5E30695270CDBCB7A16F1D95778A |
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| Characteristics of the output that is not registered in CRPA or CRAA |
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| OCA10. Hyperlink to the record in another publicly accessible register, catalogue of research/ artistic/other outputs | https://www.scopus.com/pages/publications/105000711461?origin=resultslist |
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| OCA11. Characteristics of the output in the format of the CRPA or the CRAA bibliographic record, if the output is not available in a publicly accessible register or catalogue of outputs | V3 / ADC15 DANČOVÁ, Nikola - GREGOVÁ, Gabriela - SZABÓOVÁ, Tatiana - MARCINČÁK, Slavomír. The effects of natural additives on litter condition, microclimate environment and antimicrobial resistance in the broiler chickens rearing. In Frontiers in Sustainable Food Systems. ISSN 2571-581X, 2025, vol. 9, no., art. no. 1380876, p. [1-13]. (2024: 3.1 - IF, 4.6 - IF 5y, 0.791 - SJR, Q1 - SJR Best Q, Q2 - JCR Best Q). |
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| OCA12. Type of the output (if the output is not registered in CRPA or CRAA) | article |
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| OCA13. Hyperlink to the webpage where the output is available (full text, other documentation, etc.) | https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2025.1380876/full |
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| OCA14. Characteristics of the author's contribution | he author is the source of the main ideas and co-author of the output. |
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| OCA15. Annotation of the output with contextual information concerning the description of creative process and the content of the research/artistic/other activity, etc. | Feed additives like humic substances (HS) and probiotics (P) can enhance broiler health, production, welfare, and environmental conditions. The study examined the effects of HS as litter additives on the physical– chemical properties of poultry litter and its capacity to emit fewer harmful gases. This study involved 120 one-day-old ROSS 308 broiler chicks divided into three groups for a 39-day fattening period. By days 21, 28, and 35, the moisture levels in the HS and HS + P groups were significantly lower (p < 0.001) compared to the C group. HS maintained a slightly acidic pH in the experimental groups, whereas the C group’s pH became slightly alkaline. The absorption properties of HS and pH stabilization contributed to the rise in NH3 and CO2 emissions to the environment at a lower rate than in the C group (p > 0.05). The second aim was to monitor the influence of HS and P as feed and litter additives on bacterial counts and the antimicrobial resistance of E. coli isolates by the microdilution method. Coliform and fecal coliform counts were significantly lower (p < 0.001) in the litter of the experimental groups on day 35. Minimum inhibitory concentration revealed resistance to ciprofloxacin, tetracycline, ampicillin + sulbactam, and cotrimoxazole among E. coli isolates, with resistance ranging from 5 to 15% across all groups. It is concluded that the effect of the additives used increased litter quality. These findings underscore the importance of incorporating additives into intensive poultry systems, where maintaining litter quality is crucial to reducing disease transmission, improving animal welfare, and increasing production efficiency. |
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| Other data |
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| OCA16. Annotation of the output in English | Feed additives like humic substances (HS) and probiotics (P) can enhance broiler health, production, welfare, and environmental conditions. Methods: This study involved 120 one-day-old ROSS 308 broiler chicks divided into three groups for a 39-day fattening period. The first experimental group (HS) received a feed mixture with 0.6% HS; the second group (HS + P) got the same HS concentration along with a probiotic strain (Limosilactobacillus fermentum) in water. The control group (C) was fed a basal diet without additives. The HS mixture was also added to the litter in both the HS and HS + P groups, whereas the C group did not receive any HS. The study examined the effects of HS as litter additives on the physical– chemical properties of poultry litter and its capacity to emit fewer harmful gases. Gas emissions were measured using a plastic chamber connected to a uniTOX instrument, and litter moisture was assessed using AOAC methods. Results: By days 21, 28, and 35, the moisture levels in the HS and HS + P groups were significantly lower (p < 0.001) compared to the C group. HS maintained a slightly acidic pH in the experimental groups, whereas the C group’s pH became slightly alkaline. The absorption properties of HS and pH stabilization contributed to the rise in NH3 and CO2 emissions to the environment at a lower rate than in the C group (p > 0.05). The second aim was to monitor the influence of HS and P as feed and litter additives on bacterial counts and the antimicrobial resistance of E. coli isolates by the microdilution method. Coliform and fecal coliform counts were significantly lower (p < 0.001) in the litter of the experimental groups on day 35. Minimum inhibitory concentration revealed resistance to ciprofloxacin, tetracycline, ampicillin + sulbactam, and cotrimoxazole among E. coli isolates, with resistance ranging from 5 to 15% across all groups. Discussion: It is concluded that the effect of the additives used increased litter quality. These findings underscore the importance of incorporating additives into intensive poultry systems, where maintaining litter quality is crucial to reducing disease transmission, improving animal welfare, and increasing production efficiency. |
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| OCA17. List of maximum 5 most significant citations corresponding to the output | 1. Oke, Oyegunle Emmanuel, et al. \"The role of gut microbiota-derived metabolites in modulating poultry immunometabolism.\" Frontiers in Physiology 16 (2025): 1700406.;
2. Racewicz, Przemysław, et al. \"Effects of hygiene methods on the microbiome and resistome of poultry litter.\" Annals of Animal Science, ahead of print, National Research Institute of Animal Production, 2026, https://doi.org/10.2478/aoas-2025-0116. |
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| OCA18. Characteristics of the output's impact on socio-economic practice | Excessive use of antibiotics in veterinary practice and failure to comply with good production practices in animal husbandry hygiene are significant factors in the emergence and spread of antibiotic-resistant microorganisms in animal husbandry. The presented publication focuses on the influence of humic substances as litter additives on the physicochemical properties of poultry litter and its ability to emit less harmful gases. The influence of humic substances and probiotics as feed additives on the bacterial counts and antimicrobial resistance of E. coli isolates was also monitored. The use of adsorbent components in intensive poultry farming is important for maintaining litter quality. This subsequently impacts hygiene, sanitation, disease transmission, welfare, and production efficiency. |
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| OCA19. Characteristics of the output and related activities' impact on the educational process | The publication offers an overview of new possibilities for using natural humic substances and probiotics to improve litter quality and hygiene and sanitation in poultry farming. As part of teaching environmental hygiene in animal husbandry and sanitation in the food industry to UVLF students, this is important for reducing the incidence of bacterial antimicrobial resistance and thus its spread into the environment and the food chain. |
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