Evaluation of broiler meat in experimental listeriosis

Borovuk, Iryna; Zazharska, N. M.

doi:10.5455/javar.2022.i580

Cited by 2 publications

(2 citation statements)

References 24 publications

(27 reference statements)

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“…In an experimental infection of broiler chicken with 1.5 × 10 8 CFU of L. ivanovii UNCSM-042, isolated in Ukraine, post-mortem examination after 23 dpi allowed to observe an enlargement of the spleen, an overfilled gallbladder, congestive hyperemia of the internal organs, and hyperplasia of the intestinal vessels. However, the growth level of the infected animals was not affected compared to the controls [30]. Based on the available evidences, limited invasiveness in vivo can account for the rare occurrence of L. ivanovii infections.…”

Section: Ivanovii Invasivenessmentioning

confidence: 93%

Virulence Characteristics and Distribution of the Pathogen Listeria ivanovii in the Environment and in Food

et al. 2022

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Listeria ivanovii and L. monocytogenes, are the only pathogenic species of the genus Listeria and share many virulence factors and mechanisms of pathogenicity. L. ivanovii shows host tropism towards small ruminants and rodents and much lower virulence for humans compared to L. monocytogenes. However, severe infections caused by L. ivanovii, resulting in bacteremia, abortion and stillbirth, occasionally occurred in immunocompromised persons and in pregnant women, while in immunocompetent hosts L. ivanovii can cause gastroenteritis. In this review, the updated knowledge on virulence aspects and distribution of L. ivanovii in the environment and in food is summarized. Recent research on its virulence characters at genome level gave indications on how pathogenicity evolved in this bacterial species. As for L. monocytogenes, L. ivanovii infections occurred after the ingestion of contaminated food, so an overview of reports regarding its distribution in food products was carried out to obtain indications on the categories of foods exposed to contamination by L. ivanovii. It was found that a wide variety of food products can be a source of this microorganism and that, like L. monocytogenes, L. ivanovii is able to persist in the food production environment. Studies on its ability to grow in enrichment and isolation media suggested that its occurrence in nature might be underestimated. Moreover, virulence varies among strains for differences in virulence character regulation, presence/absence of genetic regions and the possible instability of a Listeria pathogenicity genomic island, LIPI-2, which is unique to L. ivanovii. We can conclude that L. ivanovii, as a possible pathogen for animals and humans, requires more focused investigations regarding its occurrence in the environment and in food and on intra-species variability of pathogenic potential.

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Section: Ivanovii Invasivenessmentioning

confidence: 93%

Virulence Characteristics and Distribution of the Pathogen Listeria ivanovii in the Environment and in Food

et al. 2022

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“…Забій відбувався на 38-у добу життя курчат з дотриманням санітарно-гігієнічних вимог. Перед забоєм проведено передзабійний огляд курчат-бройлерів: шкірні покриви та видимі слизові оболонки без змін, гребінь червоний, спостерігалася вгодованість тварин усіх груп (Borovuk & Zazharska, 2022).…”

Section: таблицяunclassified

The effect of the causative agent of listeriosis on the body of broiler chickens under experimental conditions

Боровик¹,

Zazharska²,

Фотіна³

2022

SMLNUVMB

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Ross Cobb 500 chickens (40) were divided into four groups of 10 animals. On the 15th day of life, Chickens from experimental groups were orally infected with a daily culture at a dose of 0.5 Mac Farland-1 ml (1.5×108 CFU/cm3) L. innocua, L. ivanovii, L. monocytogenes). One group was a control group. At the time of slaughter, on the 38th day of the chickens' life, blood samples were taken for biochemical and hematological studies. At the end of the experiment, in the control group of chickens, all animals (10) were alive; in the L. innocua, L. ivanovii, and L. monocytogenes groups, 8, 9, and 7 birds remained, respectively. Infection of poultry with the causative agent of listeriosis did not affect the weight of experimental broiler chickens; the average weight of infected animals was almost at the same level as the control group: L. monocytogenes (2278.5 ± 169.6 g), L. ivanovii (2422.8 ± 63.4 g), L. innocua (2358.0 ± 68.9 g), control group (2320.0 ± 70.8 g). Among the biochemical indicators of the blood of broiler chickens, specific biochemical changes were found, which were characterized, first of all, by an increase in the level of creatinine and the ratio of Ca and P and a decrease in the activity of alkaline phosphatase. The established changes may indicate a violation of metabolic processes in bone and muscle tissue due to the action of Listeria. According to the results of hematological studies of the broilers of the control and experimental groups, it was established that heterophilia due to L. monocytogenes, eosinophilia, and lymphocytosis – due to L. ivanovii and L. innocua compared to the control.

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Evaluation of broiler meat in experimental listeriosis

Cited by 2 publications

References 24 publications

Virulence Characteristics and Distribution of the Pathogen Listeria ivanovii in the Environment and in Food

Virulence Characteristics and Distribution of the Pathogen Listeria ivanovii in the Environment and in Food

The effect of the causative agent of listeriosis on the body of broiler chickens under experimental conditions

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