Knežević, Slobodan

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  • Knežević, Slobodan (4)
Projects

Author's Bibliography

ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA

Pajić, Marko; Knežević, Slobodan; Maletić, Jelena; Spiridonović, Sava; Đurđević, Biljana; Todorović, Dalibor; Ostojić Andrić, Dušica

(Institute for Animal Husbandry, Belgrade-Zemun, Serbia, 2023-10)

TY  - CONF
AU  - Pajić, Marko
AU  - Knežević, Slobodan
AU  - Maletić, Jelena
AU  - Spiridonović, Sava
AU  - Đurđević, Biljana
AU  - Todorović, Dalibor
AU  - Ostojić Andrić, Dušica
PY  - 2023-10
UR  - http://r.istocar.bg.ac.rs/handle/123456789/898
AB  - The broiler production faces many challenges, which can cause negative
effects on their health and welfare. The great importance for farmers is to prevent
disease outbreaks, and biosecurity measures are very significant. This study aimed
to quantify the level of biosecurity measures in broiler farms of different capacities,
using a standardized procedure, and to identify key aspects that would require
improvements. The research was conducted from May to September 2022, and 15
randomly selected broiler farms participated. Five large-size (>30,000 chickens),
five middle-size (10,000-30,000 chickens) and five small-size farms (<10,000
chickens) were analyzed. All farms are located in Vojvodina and farmers agreed to
participate in the survey. The Biocheck.UGent scoring system
(https://biocheckgent.com/en) was used to quantify biosecurity measures. The
overall farm biosecurity is a weighted average of the external and internal
biosecurity. Our results showed a low level of implementation of internal and
external biosecurity measures on all farms (40-63%). The overall rating of
biosecurity on farms was lower than the world and country's average. The results of
this study suggest that the control of implemented biosecurity measures in broiler
farms is very important. Most of the biosecurity risks for broiler farms originate
from inappropriate site selection, purchase of day-old chicks of unknown quality,
lack of procedures, and training of farm employees. This study should provide a
good encouragement for the development of a biosecurity plan, identifying risks
and the appropriate way to educate farm
PB  - Institute for Animal Husbandry, Belgrade-Zemun, Serbia
C3  - Proceedings of 14th International Symposium „Modern Trends In Livestock Production“
T1  - ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA
SP  - 193
EP  - 205
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_898
ER  - 
@conference{
author = "Pajić, Marko and Knežević, Slobodan and Maletić, Jelena and Spiridonović, Sava and Đurđević, Biljana and Todorović, Dalibor and Ostojić Andrić, Dušica",
year = "2023-10",
abstract = "The broiler production faces many challenges, which can cause negative
effects on their health and welfare. The great importance for farmers is to prevent
disease outbreaks, and biosecurity measures are very significant. This study aimed
to quantify the level of biosecurity measures in broiler farms of different capacities,
using a standardized procedure, and to identify key aspects that would require
improvements. The research was conducted from May to September 2022, and 15
randomly selected broiler farms participated. Five large-size (>30,000 chickens),
five middle-size (10,000-30,000 chickens) and five small-size farms (<10,000
chickens) were analyzed. All farms are located in Vojvodina and farmers agreed to
participate in the survey. The Biocheck.UGent scoring system
(https://biocheckgent.com/en) was used to quantify biosecurity measures. The
overall farm biosecurity is a weighted average of the external and internal
biosecurity. Our results showed a low level of implementation of internal and
external biosecurity measures on all farms (40-63%). The overall rating of
biosecurity on farms was lower than the world and country's average. The results of
this study suggest that the control of implemented biosecurity measures in broiler
farms is very important. Most of the biosecurity risks for broiler farms originate
from inappropriate site selection, purchase of day-old chicks of unknown quality,
lack of procedures, and training of farm employees. This study should provide a
good encouragement for the development of a biosecurity plan, identifying risks
and the appropriate way to educate farm",
publisher = "Institute for Animal Husbandry, Belgrade-Zemun, Serbia",
journal = "Proceedings of 14th International Symposium „Modern Trends In Livestock Production“",
title = "ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA",
pages = "193-205",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_898"
}
Pajić, M., Knežević, S., Maletić, J., Spiridonović, S., Đurđević, B., Todorović, D.,& Ostojić Andrić, D.. (2023-10). ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA. in Proceedings of 14th International Symposium „Modern Trends In Livestock Production“
Institute for Animal Husbandry, Belgrade-Zemun, Serbia., 193-205.
https://hdl.handle.net/21.15107/rcub_ristocar_898
Pajić M, Knežević S, Maletić J, Spiridonović S, Đurđević B, Todorović D, Ostojić Andrić D. ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA. in Proceedings of 14th International Symposium „Modern Trends In Livestock Production“. 2023;:193-205.
https://hdl.handle.net/21.15107/rcub_ristocar_898 .
Pajić, Marko, Knežević, Slobodan, Maletić, Jelena, Spiridonović, Sava, Đurđević, Biljana, Todorović, Dalibor, Ostojić Andrić, Dušica, "ASSESSMENT OF THE CURRENT STATE OF BIOSECURITY MEASURES ON BROILER CHICKEN FARMS WITH DIFFERENT CAPACITIES IN VOJVODINA" in Proceedings of 14th International Symposium „Modern Trends In Livestock Production“ (2023-10):193-205,
https://hdl.handle.net/21.15107/rcub_ristocar_898 .

Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia

Pajić, Marko; Todorović, Dalibor; Knežević, Slobodan; Prunić, Bojana; Velhner, Maja; Ostojić Andrić, Dušica; Stanimirović, Zoran

(2023)

TY  - JOUR
AU  - Pajić, Marko
AU  - Todorović, Dalibor
AU  - Knežević, Slobodan
AU  - Prunić, Bojana
AU  - Velhner, Maja
AU  - Ostojić Andrić, Dušica
AU  - Stanimirović, Zoran
PY  - 2023
UR  - http://r.istocar.bg.ac.rs/handle/123456789/889
AB  - Coccidiosis is a significant poultry disease caused by the Eimeria species. This study aims to determine the prevalence of Eimeria spp. on broiler farms in Vojvodina, along with the identification of parasite species, and assess the implemented biosecurity measures. The study was conducted on 100 broiler chicken farms (28 small-sized; 34 medium-sized; 38 large-sized farms) from June 2018 to December 2021. One pooled sample of faeces was collected from three to six-week-old chickens from each farm, and assessment of biosecurity measures was carried out using a questionnaire. Using the PCR method, DNA of Eimeria was found in 59 samples (59%), while 41 samples (41%) were negative. Four species of Eimeria were identified, and their prevalence was the following: E. acervulina (37%), E. maxima (17%), E. mitis (25%) and E. tenella (48%). A significant difference (p < 0.05) was established in the number of oocysts in flocks from small-sized farms compared to medium-sized farms. It was found that regular implementation of disinfection, disinsection and deratisation measures, as well as all the biosecurity measures, can significantly reduce the occurrence of coccidiosis. These results will help to develop better strategies for the control and prevention of coccidiosis on farms.
T2  - Life (Basel, Switzerland)
T1  - Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia
VL  - 13
IS  - 4
SP  - 1039
DO  - 10.3390/life13041039
ER  - 
@article{
author = "Pajić, Marko and Todorović, Dalibor and Knežević, Slobodan and Prunić, Bojana and Velhner, Maja and Ostojić Andrić, Dušica and Stanimirović, Zoran",
year = "2023",
abstract = "Coccidiosis is a significant poultry disease caused by the Eimeria species. This study aims to determine the prevalence of Eimeria spp. on broiler farms in Vojvodina, along with the identification of parasite species, and assess the implemented biosecurity measures. The study was conducted on 100 broiler chicken farms (28 small-sized; 34 medium-sized; 38 large-sized farms) from June 2018 to December 2021. One pooled sample of faeces was collected from three to six-week-old chickens from each farm, and assessment of biosecurity measures was carried out using a questionnaire. Using the PCR method, DNA of Eimeria was found in 59 samples (59%), while 41 samples (41%) were negative. Four species of Eimeria were identified, and their prevalence was the following: E. acervulina (37%), E. maxima (17%), E. mitis (25%) and E. tenella (48%). A significant difference (p < 0.05) was established in the number of oocysts in flocks from small-sized farms compared to medium-sized farms. It was found that regular implementation of disinfection, disinsection and deratisation measures, as well as all the biosecurity measures, can significantly reduce the occurrence of coccidiosis. These results will help to develop better strategies for the control and prevention of coccidiosis on farms.",
journal = "Life (Basel, Switzerland)",
title = "Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia",
volume = "13",
number = "4",
pages = "1039",
doi = "10.3390/life13041039"
}
Pajić, M., Todorović, D., Knežević, S., Prunić, B., Velhner, M., Ostojić Andrić, D.,& Stanimirović, Z.. (2023). Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia. in Life (Basel, Switzerland), 13(4), 1039.
https://doi.org/10.3390/life13041039
Pajić M, Todorović D, Knežević S, Prunić B, Velhner M, Ostojić Andrić D, Stanimirović Z. Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia. in Life (Basel, Switzerland). 2023;13(4):1039.
doi:10.3390/life13041039 .
Pajić, Marko, Todorović, Dalibor, Knežević, Slobodan, Prunić, Bojana, Velhner, Maja, Ostojić Andrić, Dušica, Stanimirović, Zoran, "Molecular Investigation of Eimeria Species in Broiler Farms in the Province of Vojvodina, Serbia" in Life (Basel, Switzerland), 13, no. 4 (2023):1039,
https://doi.org/10.3390/life13041039 . .
1
4

Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens.

Đurđević, Biljana; Pajić, Marko; Knežević, Slobodan; Polaček, Vladimir; Nešić, Ksenija; Vučićević, Ivana; Ostojić Andrić, Dušica

(2022)

TY  - JOUR
AU  - Đurđević, Biljana
AU  - Pajić, Marko
AU  - Knežević, Slobodan
AU  - Polaček, Vladimir
AU  - Nešić, Ksenija
AU  - Vučićević, Ivana
AU  - Ostojić Andrić, Dušica
PY  - 2022
UR  - http://r.istocar.bg.ac.rs/handle/123456789/821
AB  - This experiment was performed to investigate the protective effect of a new combined adsorbent (bentonite + yeast cell 
wall extract) previously tested in vitro, on the occurrence of pathological lesions in broilers fed a diet contaminated with aflatoxin
B1 until 21 days of age. A total of 96 one-day old Ross 308 hybrid broiler chickens were divided into four groups: group I (control),
group II (5 g/kg adsorbent), group III (5 g/kg adsorbent + 2  mg/kg aflatoxin B1), and group IV (2 mg/kg aflatoxin B1). Grossly,
AFB1 and AFB1+adsorbent fed birds showed enlargement, friable texture of liver and enlargement and pallorness of kidneys. Spleen
revealed size reduction. No gross-pathological changes were observed in control and group II. Histopathologically, lesions were
observed in aflatoxicated groups. Liver revealed vacuolar cell degeneration, periportal and perivascular infiltration of mononuclear
cells. Kidneys revealed mild to moderate degree of haemorrhages, tubular epithelial necrosis and infiltration of mononuclear
cells along with heterophils. In group IV, catarrhal enteritis characterized by desquamation of epithelial cells were found in the
duodenum. A milder form of gross and histopathological lesions was seen in group III. In conclusion, the present study revealed
that supplementation of a new combined toxin binder product in the concentration of 5 g/kg could not completely ameliorate
aflatoxicity in broilers, although it met the stringent European regulation requirements for the minimum of 90% aflatoxin binding
efficiency in in vitro study.
T2  - Kafkas Universitesi Veteriner Fakültesi Dergisi
T1  - Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens.
VL  - 28
IS  - 2
SP  - 185
EP  - 191
DO  - 10.9775/kvfd.2021.26654
ER  - 
@article{
author = "Đurđević, Biljana and Pajić, Marko and Knežević, Slobodan and Polaček, Vladimir and Nešić, Ksenija and Vučićević, Ivana and Ostojić Andrić, Dušica",
year = "2022",
abstract = "This experiment was performed to investigate the protective effect of a new combined adsorbent (bentonite + yeast cell 
wall extract) previously tested in vitro, on the occurrence of pathological lesions in broilers fed a diet contaminated with aflatoxin
B1 until 21 days of age. A total of 96 one-day old Ross 308 hybrid broiler chickens were divided into four groups: group I (control),
group II (5 g/kg adsorbent), group III (5 g/kg adsorbent + 2  mg/kg aflatoxin B1), and group IV (2 mg/kg aflatoxin B1). Grossly,
AFB1 and AFB1+adsorbent fed birds showed enlargement, friable texture of liver and enlargement and pallorness of kidneys. Spleen
revealed size reduction. No gross-pathological changes were observed in control and group II. Histopathologically, lesions were
observed in aflatoxicated groups. Liver revealed vacuolar cell degeneration, periportal and perivascular infiltration of mononuclear
cells. Kidneys revealed mild to moderate degree of haemorrhages, tubular epithelial necrosis and infiltration of mononuclear
cells along with heterophils. In group IV, catarrhal enteritis characterized by desquamation of epithelial cells were found in the
duodenum. A milder form of gross and histopathological lesions was seen in group III. In conclusion, the present study revealed
that supplementation of a new combined toxin binder product in the concentration of 5 g/kg could not completely ameliorate
aflatoxicity in broilers, although it met the stringent European regulation requirements for the minimum of 90% aflatoxin binding
efficiency in in vitro study.",
journal = "Kafkas Universitesi Veteriner Fakültesi Dergisi",
title = "Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens.",
volume = "28",
number = "2",
pages = "185-191",
doi = "10.9775/kvfd.2021.26654"
}
Đurđević, B., Pajić, M., Knežević, S., Polaček, V., Nešić, K., Vučićević, I.,& Ostojić Andrić, D.. (2022). Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens.. in Kafkas Universitesi Veteriner Fakültesi Dergisi, 28(2), 185-191.
https://doi.org/10.9775/kvfd.2021.26654
Đurđević B, Pajić M, Knežević S, Polaček V, Nešić K, Vučićević I, Ostojić Andrić D. Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens.. in Kafkas Universitesi Veteriner Fakültesi Dergisi. 2022;28(2):185-191.
doi:10.9775/kvfd.2021.26654 .
Đurđević, Biljana, Pajić, Marko, Knežević, Slobodan, Polaček, Vladimir, Nešić, Ksenija, Vučićević, Ivana, Ostojić Andrić, Dušica, "Evaluation of the Effects of New Combined Adsorbent on Occurrence of Pathological Lesions in Aflatoxin B1‐Challenged Broiler Chickens." in Kafkas Universitesi Veteriner Fakültesi Dergisi, 28, no. 2 (2022):185-191,
https://doi.org/10.9775/kvfd.2021.26654 . .

The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers

Pajić, Marko; Knežević, Slobodan; Todorović, D.; Đurđević, Biljana; Samojlović, Milena; Pelić, M.; Ostojić Andrić, Dušica

(2021)

TY  - CONF
AU  - Pajić, Marko
AU  - Knežević, Slobodan
AU  - Todorović, D.
AU  - Đurđević, Biljana
AU  - Samojlović, Milena
AU  - Pelić, M.
AU  - Ostojić Andrić, Dušica
PY  - 2021
UR  - http://r.istocar.bg.ac.rs/handle/123456789/890
C3  - Zbornik radova sa 30. Savetovanja živinara Srbije. Tara, Srbija
T1  - The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers
T1  - Primena sintetskih i biljnih kokcidostatika u prevenciji kokcidioze i oksidativnog stresa kod tovnih pilića
IS  - 5-6
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_890
ER  - 
@conference{
author = "Pajić, Marko and Knežević, Slobodan and Todorović, D. and Đurđević, Biljana and Samojlović, Milena and Pelić, M. and Ostojić Andrić, Dušica",
year = "2021",
journal = "Zbornik radova sa 30. Savetovanja živinara Srbije. Tara, Srbija",
title = "The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers, Primena sintetskih i biljnih kokcidostatika u prevenciji kokcidioze i oksidativnog stresa kod tovnih pilića",
number = "5-6",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_890"
}
Pajić, M., Knežević, S., Todorović, D., Đurđević, B., Samojlović, M., Pelić, M.,& Ostojić Andrić, D.. (2021). The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers. in Zbornik radova sa 30. Savetovanja živinara Srbije. Tara, Srbija(5-6).
https://hdl.handle.net/21.15107/rcub_ristocar_890
Pajić M, Knežević S, Todorović D, Đurđević B, Samojlović M, Pelić M, Ostojić Andrić D. The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers. in Zbornik radova sa 30. Savetovanja živinara Srbije. Tara, Srbija. 2021;(5-6).
https://hdl.handle.net/21.15107/rcub_ristocar_890 .
Pajić, Marko, Knežević, Slobodan, Todorović, D., Đurđević, Biljana, Samojlović, Milena, Pelić, M., Ostojić Andrić, Dušica, "The use of synthetics and herbal coccidiostats in the prevention of coccidiosis and oxidative stress in broilers" in Zbornik radova sa 30. Savetovanja živinara Srbije. Tara, Srbija, no. 5-6 (2021),
https://hdl.handle.net/21.15107/rcub_ristocar_890 .