Наукові записки НаУКМА. Біологія та екологія

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https://ekmair.ukma.edu.ua/handle/123456789/14703
Періодичне фахове видання "Наукові записки НаУКМА. Біологія та екологія" є друкованим засобом масової інформації, науковим рецензованим журналом відкритого доступу, що оприлюднює статті з біологічної та екологічної проблематики.

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Browsing Наукові записки НаУКМА. Біологія та екологія by Author "Furtat, Iryna"

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    Colibacillosis in broiler chicks and its etiological link to the biological characteristics of Escherichia coli isolates from the breeder flock
    (2025) Nechypurenko, Oleksii; Furtat, Iryna; Dreval, Denis; Avdeeva, Liliya
    Pathogenic strains of Escherichia coli, capable of causing avian colibacillosis (APEC), currently pose a significant threat to modern poultry farming, in particular industrial broiler production. Moreover, the origin of colibacillosis in broiler chickens is connected with parental health issues. Therefore, the aim of the work was to investigate the etiological link between colibacillosis in 1-day old chicks and the biological characteristics of E. coli isolates from the breeder flock. A total of 65 pathogenic E. coli isolates were detected from broiler-breeders (n = 14) and 1-day-old chikens (n = 51). This shows a huge impact of collibacillosis on poultry farming at different levels of production. The main lesions were associated with fibrin deposition and omphlaitis formation. The last-mentioned parameter could affect the viability of chicks; nevertheless, the average Pasgar score was identified as 9.7 points. Amomg APEC, the most prevalent were O78 and O18 serotypes, wich were characterized by the absence of β-hemolysis. Moreover, the antibiotic profile of APEC isolated from parenteral and progeny flocks was similar. A high level of resistance to amoxicillin, amoxiclav, doxycycline, tetracycline, and enrofloxacin was found; more than 70% of isolated APEC were invulnerable to the mentioned antimicrobials. The most effective antibiotics were colistin, gentamicin, and florfenicol, to which only 0.0% and 2.0%, 14.3 and 9.8%, 7.1% and 2.0% of isolated APEC from broiler-breeders and chickens, respectively, were resistant. In addition, prolonged treatment of birds led to the formation of multi-resistant strains that affected chickens from the first days of life. Thus, studying the process of APEC infection through an integrated production chain can be useful for taking appropriate measures to prevent early cases of colibacilosis.
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    The effectiveness of surfactants as compounds for creating disinfectants with a wide spectrum of action
    (Національний університет "Києво-Могилянська академія", 2024) Nechypurenko, Oleksii; Furtat, Iryna; Vakuliuk, Polina; Lemeshko, Valentyna; Vortman, Maryna; Shevchenko, Valerii
    Along with the use of antibiotics, the use of disinfectants is crucial in the fighting against multi-resistant strains of bacteria that are dangerous not only for animals but also for humans. A new complex disinfectant could be used as a prevention method. Therefore, the aim of the work was to evaluate the effectiveness surfactants (anionic, cationic and non-ionic) as compounds for the creating of disinfectants with a wide spectrum of action. Compositions with guanidine-containing oligomer (GCO) inhibited S. aureus and C. albicans most effectively. At concentrations of 1000 and 100 ppm, 100 % of cells were inactivated. The biocidal effect against representatives of Gram-negative bacteria was weaker, which should be considered during creation of antimicrobial agents active against pathogenic strains of E. coli. With a rational combination of effective components and their synergism, it is possible to significantly reduce the concentration of the working solution compared to already used commercial disinfectants. For example, the concentration of glutaraldehyde in composition containing 3 % GCO, 1 % Triton X-100, 1 % Trilon B and 1 % glutaraldehyde was in 9 times lower than of Lysoformin 3000. Also, most surfactants used were not characterized by mutagenic activity, which is one of the main criteria for disinfectants usage since this reduces the risks of developing bacterial resistance to antibiotics and other biocides. Thus, the development and implementation of new disinfectants, which could help to fight against multi-resistant strains of bacteria, is an indispensable part of comprehensive programs in controlling and prevention of common diseases in animal husbandry and medicine, particularly, colibacillosis.