Identification and molecular characterization of Listeria monocytogenes isolated in raw milk in the region of Algiers (Algeria)

Hamdi, Taha Mossadak; Naim, M.; Martin, Paul; Jacquet, Christine

doi:10.1016/j.ijfoodmicro.2006.12.038

Cited by 36 publications

(26 citation statements)

References 20 publications

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“…In Algeria Hamdi et al (2007) have reported a prevalence of 9.1% per L. innocua. The contamination of this kind of product would be due to the resistance of Listeria to acidic pH (Tienungoon, Ratkowsky, McMeekin, & Ross, 2000).…”

Section: Discussionmentioning

confidence: 99%

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Prevalence of Listeria spp. in ready to eat foods (RTE) from Algiers (Algeria)

Bouayad

Hamdi

2012

Food Control

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Section: Discussionmentioning

confidence: 99%

“…Little is known about the distribution of this pathogen in food supply in Algeria and no data exist on the prevalence of L. monocytogenes in RTE foods, only the contamination in raw milk has been reported (Hamdi, Naim, Martin, & Jacquet, 2007).…”

Section: Introductionmentioning

confidence: 99%

Prevalence of Listeria spp. in ready to eat foods (RTE) from Algiers (Algeria)

Bouayad

Hamdi

2012

Food Control

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“…In this same study the L. monocytogenes contamination rate of different foods was in the order of 12.3%, 5.3%, 0%, 47.4%, and 35.1% from cheese, raw milk, meat, frozen cabbage, and salad, respectively [21]. In Algeria, some workers isolated L. monocytogenes from raw milk, whey and curdle milk and reported the prevalence of L. monocytogenes to be 2.61% from farm milk samples, 7.5% from tanker milk and 0% from curdle milk [22]. Such a relatively higher prevalence of L. monocytogenes in the current study poses high public health concern as most of the milk and milk products in Ethiopia are consumed in raw forms without being treated with sufficient heat.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Listeria monocytogenes in raw bovine milk and milk products from central highlands of Ethiopia

Seyoum

Woldetsadik

Mekonen

et al. 2015

J Infect Dev Ctries

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Introduction: Listeria monocytogenes is of major significance in human and veterinary medicine. Most human Listeria infections are foodborne and the association of contaminated milk and dairy produce consumption with human listeriosis is noteworthy. In Ethiopia, there is limited data regarding the prevalence of L. monocytogenes in raw bovine milk and dairy products. The aim of this study was, therefore, to determine the prevalence of L. monocytogenes in raw bovine milk and dairy produce. Methodology: A total of 443 milk and milk product samples were microbiologically analyzed following methods recommended by the U.S. Food and Drug Administration Bacteriological Analytical Manual to isolate Listeria spp. Results: The overall prevalence of Listeria spp. was 28.4% and specifically that of L. monocytogenes was 5.6%. Taking the prevalence of Listeria spp. into consideration, cheese was found to be highly contaminated at 60%, followed by pasteurized milk samples (40%), raw milk (18.9%) and yoghurt (5%). Considering the prevalence of Listeria monocytogenes only, raw milk had the lowest contamination while cheese had the highest, followed by pasteurized milk and yoghurt. Conclusions: Raw milk and milk products produced in urban and peri-urban areas of central Ethiopia were contaminated with pathogenic bacteria, L. monocytogenes. The detection of this pathogen in raw milk and milk products warrants an urgent regulatory mechanism to be put in place and also the potential role of milk processing plants in the contamination of dairy products should be investigated.

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“…5B), except for the case of m-AMSA ϩ EMA ϩ Light. It has been reported that 2.4 to 7.5% of raw milk is contaminated by live L. monocytogenes (10), and live L. monocytogenes exists at a concentration of 2.0 ϫ 10 2 cells/g in raw milk cheese (2). Hence, live and heat-treated L. monocytogenes (2.2 ϫ 10 3 cells/ml) also was inoculated into pasteurized milk (Fig.…”

Section: Discussionmentioning

confidence: 99%