Listeria Species in Broiler Poultry Farms: Potential Public Health Hazards

Dahshan, Hesham; Merwad, Abdallah M. A.; Mohamed, Taisir Saber

doi:10.4014/jmb.1603.03075

Cited by 27 publications

(33 citation statements)

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“…As we only looked into one specific farm-to-fork continuum (one farm, one slaughterhouse) in our study, the prevalences found at the various production stages cannot necessarily be generalized. However, our prevalence rates on farm level were in agreement with a previous study on a poultry farm in Egypt [26] where L. innocua was found in 20% (4/20) of samples from poultry feed but not in drinking water (0/20). However, L. innocua was more prevalent in soiled litter than in our study (35% (28/80) vs. 20% (1/5)).…”

Section: Discussionsupporting

confidence: 92%

“…In our dataset, the overall occurrence of L. innocua in raw poultry meat and chicken products was 20% (20/100). Higher prevalence rates for L. innocua in raw poultry meat were reported from Spain (66%), Turkey (58%), Italy (40%), Jordan (50%), and Egypt (31%) [26,[33][34][35][36] while lower rates were reported from Morocco (14%) and Iran (19%) [37,38]. Contamination of raw animal products may occur after slaughter or during food processing.…”

Section: Discussionmentioning

confidence: 97%

“…While several studies from Egypt have reported frequent contamination of foodstuffs such as meat and dairy products with different Listeria spp. [26,[44][45][46][47]] such food has not yet been associated with documented outbreaks of listeriosis. A major reason for this is probably the lack of a surveillance system for human listeriosis in Egypt and hence underreporting of cases.…”

Section: Discussionmentioning

confidence: 99%

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Contamination Pathways can Be Traced along the Poultry Processing Chain by Whole Genome Sequencing of Listeria innocua

et al. 2020

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Foodborne infection with Listeria causes potentially life-threatening disease listeriosis. Listeria monocytogenes is widely recognized as the only species of public health concern, and the closely related species Listeria innocua is commonly used by the food industry as an indicator to identify environmental conditions that allow for presence, growth, and persistence of Listeria spp. in general. In our study, we analyze the occurrence of Listeria spp. in a farm-to-fork approach in a poultry production chain in Egypt and identify bacterial entry gates and transmission systems. Prevalence of Listeria innocua at the three production stages (farm, slaughterhouse, food products) ranged from 11% to 28%. The pathogenic species Listeria monocytogenes was not detected, and Listeria innocua strains under study did not show genetic virulence determinants. However, the close genetic relatedness of Listeria innocua isolates (maximum 63 SNP differences) indicated cross-contamination between all stages from farm to final food product. Based on these results, chicken can be seen as a natural source of Listeria. Last but not least, sanitary measures during production should be reassessed to prevent bacterial contamination from entering the food chain and to consequently prevent human listeriosis infections. For this purpose, surveillance must not be restricted to pathogenic species.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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Contamination Pathways can Be Traced along the Poultry Processing Chain by Whole Genome Sequencing of Listeria innocua

et al. 2020

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“…Indeed, it has rarely been proven that poultry feed and drinking water can be contaminated with Listeria spp. generally ( 54 ) or L. monocytogenes specifically ( 60 , 64 ). Broiler flock contamination rates for L. monocytogenes can range from 3 to 32% ( 47 , 55 , 56 , 58 ), with similar contamination rates for layer hens and turkey flocks ( 55 – 57 ).…”

Section: Listeria Spp Within the Grow-out Farm Environmentmentioning

confidence: 99%

Listeria Occurrence in Poultry Flocks: Detection and Potential Implications

et al. 2017

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Foodborne pathogens such as Salmonella, Campylobacter, Escherichia coli, and Listeria are a major concern within the food industry due to their pathogenic potential to cause infection. Of these, Listeria monocytogenes, possesses a high mortality rate (approximately 20%) and is considered one of the most dangerous foodborne pathogens. Although the usual reservoirs for Listeria transmission have been extensively studied, little is known about the relationship between Listeria and live poultry production. Sporadic and isolated cases of listeriosis have been attributed to poultry production and Listeria spp. have been isolated from all stages of poultry production and processing. Farm studies suggest that live birds may be an important vector and contributor to contamination of the processing environment and transmission of Listeria to consumers. Therefore, the purpose of this review is to highlight the occurrence, incidence, and potential systemic interactions of Listeria spp. with poultry.

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“…The differences in the distribution of virulence internalin genes could be attributed to the source of samples or L. monocytogenes serotype or mutations in these genes resulted in reduction in invasion or virulence in animal model studies or tissue culture, assuring the significant role of such genes in the pathogenesis and virulence of L. monocytogenes [57][58][59]. It was noticed that 12 isolates of L. monocytogenes carry inlA gene and 6 isolates carry inlB gene that indicates virulent strains of L. monocytogenes and creates hazard in dairy farms as well as milk handlers, milk consumers and pregnant women.…”

mentioning

confidence: 99%

Prevalence of Listeria Species in Dairy Cows and Pregnant Women with Reference to Virulotyping of Listeria monocytogenes in Egypt

El-Naenaeey

Abdelwahab

Merwad

et al. 2019

Zagazig Veterinary Journal

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This study was conducted to determine the prevalence of Listeria spp. in milk and feces of dairy cows as well as stool of pregnant women in Sharkia and Dakahlia Governorates, Egypt. Three hundred and fifty samples including; normal raw milk (n=200), mastitis milk (n=50), feces of dairy cattle (n=50) and stool of pregnant women (n=50) were randomly collected. Listeria spp. were isolated on Oxford agar and then subjected to biochemical and molecular identification. The overall isolation rate of Listeria spp. was 16%. The prevalence rates of Listeria monocytogenes were 8%, 4%, 2% and 4% in feces of dairy cows, normal milk, mastitis milk and stool of pregnant women, respectively. The prevalence of L. ivanovii and L. welshimeri in milk of dairy cows were 6% and 4%, respectively. L. monocytogenes isolates were molecularly confirmed to the species level by amplification of 16S rRNA gene. The distribution of internalin A (inlA) and internalin B (inlB) was determined in 15 identified L. monocytogenes isolates. The overall prevalence of inlA gene and inlB gene in L. monocytogenes isolates from different sources were 80% and 40%, respectively. Two L. monocytogenes isolates from normal raw milk and feces of dairy cows didn't harbor both inlA and inlB genes. Listeria spp. isolated from normal milk, feces, mastitis milk and stool of pregnant women, potentially can cause human illness and abortion in pregnant women. Internalin (A&B) genes are considered the best indicator for virulence determination of L. monocytogenes isolated from different sources.

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Listeria Species in Broiler Poultry Farms: Potential Public Health Hazards

Cited by 27 publications

References 0 publications

Contamination Pathways can Be Traced along the Poultry Processing Chain by Whole Genome Sequencing of Listeria innocua

Contamination Pathways can Be Traced along the Poultry Processing Chain by Whole Genome Sequencing of Listeria innocua

Listeria Occurrence in Poultry Flocks: Detection and Potential Implications

Prevalence of Listeria Species in Dairy Cows and Pregnant Women with Reference to Virulotyping of Listeria monocytogenes in Egypt

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