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Wyświetlanie 1-4 z 4
Tytuł:
Analysis of the microbial population that most often causes mastitis in dairy cows
Autorzy:
Radzikowski, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/1178967.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
dairy cows
mastitis
microbial population
milk
Opis:
Mastitis is the most important disease of dairy cows, affecting the major economic losses of milk producers and the dairy industry around the world. In the work on the basis of data from the laboratory dairy plants analyzed the occurrence of microorganisms causing mastitis. Based on microbiological studies, 1462 milk samples taken from quarters of the cows' udders showed that the most common cause of inflammation was Streptococcus agalactiae, whose strains occurred in 27.77% of mastitis cows. In 18.13% of cows mastitis was caused by Staphylococcus aureus, 14.91% by Eschericha Coli, 8.55% by Streptococcus uberis, and 8.82% did not show bacterial growth during microbiological tests. In order to reduce the occurrence of mastitis, appropriate hygiene should be followed during milking of cows and, in the case of disease, cows udder milk should be tested to identify the microorganism causing inflammation and prepare appropriate antibiotic therapy.
Źródło:
World Scientific News; 2017, 89; 317-321
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Susceptibility to antibiotics of bacterial microorganisms most commonly isolated from clinical and subclinical forms of mastitis in cows
Autorzy:
Radzikowski, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/1178235.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
antibiotic therapy
antibiotics
dairy cows
mastitis
resistance
sensitivity
Opis:
Mastitis is an increasing problem in dairy farms and in the dairy industry. The paper presents changes in susceptibility of strains of bacteria isolated from quarter milk cows from mastitis in 2011, 2012, 2013, 2014, 2015 in the Factory Laboratory of Dairy Cooperative in south-eastern Poland. In total, 3409 strains of staphylococci, 2774 strains of streptococci and 423 strains of E. coli were isolated in these years. Susceptibility to antibiotics was examined by the disc diffusion method on Mueller-Hinton base. On the basis of the research it can be concluded that the highest sensitivity of staphylococci in all study periods is found for cefguin (from 91.2% to 96.1%) and cefapirin (92.2% to 96.2%), and the smallest for tetracycline (18 %), streptomycin (11.9%) and amoxicillin (9.3%). The highest sensitivity of bacteria from the Streptococcus family are cefapirin (97%), cefquinome (96.1%), amoxycycline (95.6%) and cefalexin (89.9%) on average in all years of research. The highest resistance was found for neomycin and streptomycin. They show that during the period under study over 90% of Escherichia coli were sensitive to streptomycin. Sensitivity at the level of 70%-80% was noted for amoxicillin, neomycin and cefapirin. The highest resistance of E. coli bacilli evolved for cefallaxin and tetracycline. Accordingly, early diagnosis of a pathogenic pathogen, and then selecting the appropriate form of treatment, gives you the opportunity to minimize the loss of mastitis in dairy cows.
Źródło:
World Scientific News; 2018, 93; 107-114
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of bacterial species in milk by MALDI-TOF and assessment of some oxidant-antioxidant parameters in blood and milk from cows with different health status of the udder
Autorzy:
Ozbey, G.
Cambay, Z.
Yilmaz, S.
Aytekin, O.
Zigo, F.
Ozçelik, M.
Otlu, B.
Powiązania:
https://bibliotekanauki.pl/articles/16539172.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
dairy cows
CMT
mastitis
malondialdehyde
glutathione
MALDI-TOF
Opis:
This study aimed to identify bacterial pathogens in milk samples from dairy cows with subclinical and clinical mastitis as well as to assess the concentrations of oxidant-antioxidant parameters [malondialdehyde (MDA), reduced glutathione (GSH), and total GSH levels] in both blood and milk samples. From a total of 200 dairy cows in 8 farms, 800 quarter milk samples obtained from each udder were tested in the laboratory for the presence of udder pathogens. Cultivated bacteria causing intramammary infection from milk samples were identified by Matrix-Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF). In addition, from tested animals 60 cows were selected includıng 20 healthy cows that were CMT negative, 20 cows with subclinical mastitis (SM), and 20 cows with clinical mastitis (CM) for detection of MDA, GSH, and total GSH levels in blood and milk samples. Three hundred and eighty (47.5%; 380/800), 300 (37.5%; 300/800), and 120 (15%; 120/800) of milk samples, respectively were CMT positive or SM and CM, and those positives were cows from different farms. We observed that 87.4% (332/380), 25.3% (76/300), and 34.2% (41/120) of cows with CMT positive, CMT negative, and CM had bacterial growth. The most predominantly identified bacteria were Staphylococcus chromogenes (18.7%) obtained mainly from SM and Staphylococcus aureus (16.7%) as the most frequent cause of CM. According to our results, dairy cows with CM had the highest MDA levels, the lowest GSH, and total GSH levels in both blood and milk samples however, high MDA levels and low GSH levels in milk samples with SM were observed. Based on our results, lipid oxidant MDA and antioxidant GSH could be excellent biomarkers of cow’s milk for developing inflammation of the mammary gland. In addition, there was no link between nutrition and MDA and GSH levels.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 2; 269-277
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of effect of parenteral and oral supplementation of Selenium and vitamin E on selected antioxidant parameters and udder health of dairy cows
Autorzy:
Vasiľ, M.
Zigo, F.
Farkašová, Z.
Pecka-Kielb, E.
Bujok, J.
Illek, J.
Powiązania:
https://bibliotekanauki.pl/articles/16539105.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
dairy cows
calving
colostrum
glutathione peroxidase
milk malondialdehyde
mastitis
Opis:
The aim of this study was to compare the effect of parenteral and oral supplementation of Selenium (Se) and vitamin E (VTE) on selected antioxidant parameters in blood and colostrum as well as their effect on the incidence of mastitis in dairy cows during the final phase of gravidity (6 weeks) and first two weeks after calving. For the practical part of the study 36 dairy cows of Slovak pied breed in the second to fourth lactation-gestation cycle were selected. The animals weredivided into three groups: the control (C) and two experimental groups (D1 and D2). The selected groups were treated as follows: in group D1 products containing Se (Selevit inj.) and vitamin E (Erevit sol. inj.) were administered intramuscularly twice, six and three weeks prior to parturition; in group D2 a vitamin-minerals supplement in the form of sodium selenite (Na2SeO3) and dl-α-tocopherol acetate were supplemented orally for six weeks calving. The blood samples were collected from the vena jugularis in dairy cows approximately 42 days before calving (control sampling), on parturition day, and the 14th day after calving. Higher concentrations of Se and VTE were found in the blood plasma samples of both experimental groups collected on the day of parturition. In addition, the orally supplemented group (D2) showed higher Se and α-tocopherol concentrations in blood plasma on the14th day after calving as well a reduction of occurrence of mastitis by about 25 % compared to the control group. The relationship between inflammatory response and oxidative stress was also confirmed. The concentrations of milk malondialdehyde indicating lipid peroxidation during mastitis were significantly higher in milk samples from infected cows than in milk samples from healthy animals in each monitored group. In order to prevent oxidative stress and moderate inflammatory response in dairy cows it is very important to optimally balance their nutritive needs with an appropriate ratio of Se and VTE supplements. Therefore we still recommend supplementation of the cows’ postpartum dietwith 0.5 mg of Se/kg dry matter (DM) and 102 mg of dl-α-tocopherol acetate/kg DM to stabilize their optimal blood levels, stimulate the activity of glutathione peroxidase and reduce the incidence of mastitis.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 1; 155-164
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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