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    Wyświetlanie 1-9 z 9
    Tytuł:
    Wplyw srodkow konserwujacych na przezywalnosc Campylobacter jejuni w mielonym miesie wieprzowym
    Autorzy:
    Uradzinski, J
    Szteyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/875772.pdf
    Data publikacji:
    1993
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    przezywalnosc bakterii
    Hamina S
    konserwanty
    szczepy bakteryjne
    zywnosc
    azotyn potasu
    mieso wieprzowe
    zatrucia pokarmowe
    askorbinian sodu
    mieso
    higiena zywnosci
    chlorek sodu
    azotyn sodu
    mikroorganizmy
    Campylobacter jejuni
    mieso mielone
    choroby ukladu pokarmowego
    bacterial survival
    preservative
    bacterial strain
    food
    potassium nitrite
    pork
    food poisoning
    sodium ascorbate
    meat
    food hygiene
    sodium chloride
    sodium nitrite
    microorganism
    minced meat
    alimentary tract disease
    Opis:
    Określono wpływ chlorku sodowego, azotynu sodowego, azotynu potasowego, askorbinianu sodowego i Horniny S oraz mieszaniny wymienionych związków, dodawanych do mielonego mięsa wieprzowego, na przeżywalność pięciu szczepów Campylobacter jejuni, wyizolowanych z przypadków zatruć pokarmowych u ludzi.
    Campylobacter jejuni strains: Pen 2, 3, 6, 10 and 20 isolated from the food-borne infections in humans were tested. Fresh ground pork samples supplemented with chemical preservatives: sodium chloride - 24000 mg/kg, sodium nitrite - 125 mg/kg, potassium nitrate - 500 mg/kg, sodium ascorbate - 300 mg/kg and polyphosphate (Hamine S) - 3000 mg/kg were contaminated by C. jejuni strains. Survival of C. jejuni in ground pork was determined immediate after the contamination and over a 2-d period at 4°C on Brucella agar (Difco) containing 10% horse blood, which were incubated 48 hrs at 42°C under microaerobic conditions (5% O2, 5% CO2 and 90% N2) Campylobacter jejuni was isolated from all tested samples at the iniciál inoculum 2,5 x 105 to 1,7x 108 cfu/l g of meat. It was proved that chemical preservatives, added to meat samples in concentration usually used in meat processing, were affected in differential way on thesurvival of different strains of C. jejuni. Campylobacter jejuni Pen 2 was resistant to all preservatives used in this studies. Campylobacter jejuni Pen 3 and Pen 10 were sensitive to sodium nitrite, and Pen 10 was sensitive also to sodium chloride, potassium nitrate and composition of all tested chemicals. Also, Campylobacter jejuni Pen 20 was sensitive to sodium chloride, but potassium nitrate, sodium ascorate and Hamine S stimulated growth of this strain.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1993, 44, 4; 395-402
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie skuteczności wykrywania gronkowców koagulazododatnich w mleku na trzech płynnych podłożach
    SRAWNENIE EHFFEKTIWNOSTI OBNARUZHIWANIJA KOAGULAZOPOLOZHITEL’NYKH STAFILEKOKKOW NA TREKH ZHIDKIKH CREDAKH W MOLOKE
    COMPARISON OF THE EFFECTIVENESS OF DETECTION OF COAGULASE-POSITIVE STAPHYLOCOCCI IN MILK IN THREE LIQUID MEDIA
    Autorzy:
    Szteyn, J.
    Uradzinski, J.
    Kafel, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/878002.pdf
    Data publikacji:
    1988
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    gronkowce
    przetwory mleczne
    mleko surowe
    podloza bakteriologiczne
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1988, 39, 6
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of methods for Mycobacterium avium ssp. paratuberculosis detection in milk samples from the cattle herd showing low seroprevalence of Johnes disease
    Autorzy:
    Szteyn, J.
    Wiszniewska-Laszczych, A.
    Smolinska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31934.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Mycobacterium avium ssp. paratuberculosis (MAP) is the cause of chronic gastroenteritis in cattle called the Johne’s disease (JD). The disease causes significant economic losses in cattle production. MAP is also supposed to be involved in the Crohn’s disease and inflammatory bowel disease (IBD) in people. The detection of the cattle infection based on investigations of milk samples and evaluation of the capacity of the methods used to detect the disease was the objective of the present study. Following methods were applied for milk samples testing: detection of MAP in bacterial culture, detection of the specific IS-900 fragment of MAP in the genetic material isolated directly and detection of MAP antibodies. The results obtained were compared with the “golden standard” results, i.e. the isolation of MAP from the faeces. PQStat-the program for diagnostic reliability estimation, was used for evaluation of the sensitivity, specificity and predictive value. The method based on detection of the specific IS-900 fragment of MAP in the genetic material isolated directly from milk samples was found to possess the highest sensitivity. Detection of anti-MAP antibodies on the other hand showed the lowest sensitivity. The method of detecting anti-MAP antibodies in milk was the most specific while detection of the IS-900 fragment in the genetic material was the least specific method. These results obtained may serve as a guide to choose the most appropriate method for diagnosis of MAP infections by milk sample testing.
    Źródło:
    Polish Journal of Veterinary Sciences; 2014, 17, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prevalence and antimicrobial resistance of Campylobacter in raw milk in the selected areas of Poland
    Autorzy:
    Wysok, B.
    Wiszniewska-Laszczych, A.
    Uradzinski, J.
    Szteyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/31071.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    During the recent years, an immense increase in the number of food poisoning cases in people caused by Campylobacter (C.) species has occurred. Raw milk, next to poultry meat, is considered the most frequent cause of food poisoning in people caused by the subject bacteria, although it is not always possible to isolate Campylobacter cells from the incriminated milk. Most probably this difficulty is caused by low concentration of the pathogen in milk at the level of 2/3 cells/ml although even such low concentration represents risk to human health. The present study was aimed at determining the occurence of Campylobacter bacteria in milk originating from selected regions of Poland. The isolation method applied in this work was effective in recovering as few as 0.1 cell of Campylobacter per g of food. Among 150 bulk milk samples tested, Campylobacter spp. was isolated from 7 (4.6%) ones. The biochemical identification of the isolated strains conducted by means of conventional biochemical tests as well as by applying the API - Campy tests revealed that all the isolates belonged to the C. jejuni species. Determination of resistance to antibiotics was performed by means of the diffusion disks method for the following antibiotics: gentamicin, ciprofloxacin, ampicillin, chloramphenicol, erythromycin, doxycyclin and tetracycline. Among 7 isolates tested, all were susceptible to ampicillin, chloramphenicol, erythromycin and gentamicin, 28.5% to doxycyclin and 14.2% to tetracycline and ciprofloxacin.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of polymorphism of IS-1311 sequence in Mycobacterium avium subspecies paratuberculosis strains isolated from milk samples
    Autorzy:
    Szteyn, J.
    Bednarko-Młynarczyk, E.
    K. Liedke
    Wiszniewska-Łaszczych, A.
    Wojtacka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087864.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mycobacterium avium subsp. paratuberculosis
    milk
    IS-1311 polymorphism
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 4; 827-829
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quality of milk of cows in the first lactation vs. presence of anti-Ostertagia antibodies in their milk
    Autorzy:
    Liedtke, K.
    Szteyn, J.
    Bialobrzewski, I.
    Wiszniewska-Laszczych, A.
    Bednarko-Mlynarczyk, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/31880.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Invasions of gastrointestinal nematodes in dairy cows may affect animals productivity. The most frequently detected internal parasite of dairy cattle is Ostertagia ostertagi. The objective of this study was to determine O. ostertagi invasion extensiveness in selected herds of dairy cattle, with special consideration to cows being in the first lactation, and to analyze the milk yield and contents of basic constituents of milk originating from sero-positive cows. Five herds of dairy cattle (403), with different populations of cows, were selected for the study. Invasion extensiveness in particular herds was determined and ranged from 11.9% to 27.27%. Cows being in the first lactation, the udder milk of which was shown to contain anti-O. ostertagi antibodies, were producing on average 470 kg of milk annually less than cows being in the same lactation period. The analysis of results did not confirm the statistical significance of this difference, likewise it did not demonstrate any statistically significant differences in contents of fat, protein and dry matter. Despite a lack of the statistical significance a producer suffers great economic losses. The conducted study proves that the occurrence of O. ostertagi invasion in herds of dairy cattle is a global problem and that it affects cost-effectiveness of milk production.
    Źródło:
    Polish Journal of Veterinary Sciences; 2013, 16, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation and molecular typing of Mycobacterium avium subsp. paratuberculosis from faeces of dairy cows
    Autorzy:
    Szteyn, J.
    Liedtke, K.
    Wiszniewska-Łaszczych, A.
    Wysok, B.
    Wojtacka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087298.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mycobacterium avium subsp. paratuberculosis (MAP)
    insertion sequences polymorphism
    C-type
    S-type
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 3; 415-422
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling the kinetics of survival of Staphylococcus aureus in regional yogurt from goat’s milk
    Autorzy:
    Bednarko-Mlynarczyk, E.
    Szteyn, J.
    Bialobrzewski, I.
    Wiszniewska-Laszczych, A.
    Liedtke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087984.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The aim of this study was to determine the kinetics of the survival of the test strain of Staphylococcus aureus in the product investigated. Yogurt samples were contaminated with S. aureus to an initial level of 103-104 cfu/g. The samples were then stored at four temperatures: 4, 6, 20, 22oC. During storage, the number of S. aureus forming colonies in a gram of yogurt was determined every two hours. Based on the results of the analysis culture the curves of survival were plotted. Three primary models were selected to describe the kinetics of changes in the count of bacteria: Cole's model, a modified model of Gompertz and the model of Baranyi and Roberts. Analysis of the model fit carried out based on the average values of Pearson's correlation coefficient, between the modeled and measured values, showed that the Cole's model had the worst fit. The modified Gompertz model showed the count of S. aureus as a negative value. These drawbacks were not observed in the model of Baranyi and Roberts. For this reason, this model best reflects the kinetics of changes in the number of staphylococci in yogurt.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The presence of anti-Hypoderma antibodies in udder milk samples, and correlation with selected parameters of dairy performance
    Autorzy:
    Bednarko-Mlynarczyk, E.
    Szteyn, J.
    Bialobrzewski, I.
    Wiszniewska-Laszczych, A.
    Liedtke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/30409.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Hypoderma
    antibody
    udder
    milk sample
    correlation
    milk parameter
    dairy performance
    ELISA test
    hypodermosis
    dairy cow
    cow
    milk yield
    milk protein
    animal disease
    parasitic disease
    Opis:
    Hypodermosis is responsible for significant economic losses and remains a current problem in animal husbandry. This study determined the extent of Hypoderma spp. invasion in north-eastern Poland in dairy herds. The extent of the invasion, determined on the basis of positive results of an ELISA assay (Bovine Hypodermosis Milk Screening of Institut Pourquier), varied in herds. Statistical analysis performed on the results of milk productivity and content of basic components revealed a decrease in the milk yield and changes in milk protein in animals revealing positive, doubtful and negative results. Statistically significant differences were absent as regards the content of milk fat or milk total solids. The milk yield and the content of particular milk components were determined using the AT4 method, as part of a control program carried out by the Polish Federation of Cattle Breeders and Dairy Farmers (PFHBiPM).
    Źródło:
    Polish Journal of Veterinary Sciences; 2012, 15, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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