Absence of Listeria species in lower animals

1988 ◽  
Vol 139 (6) ◽  
pp. 727-730 ◽  
Author(s):  
H.E Müller
Keyword(s):  
Listeria Species

Prevalence of Listeria species in raw milk, ice cream and yogurt and effect of selected natural herbal extract on its survival

2020 ◽  
Vol 21 (3) ◽  
pp. 99-106
Author(s):  
Mona Yousef ◽  
Hazem Ramadan ◽  
Maha Al-Ashmawy
Keyword(s):  
Plant Extract ◽  
Reduction Rate ◽  
Ice Cream ◽  
Raw Milk ◽  
Inhibitory Effect ◽  
Food Preservation ◽  
Herbal Extract ◽  
Listeria Species ◽  
Soft Cheese ◽  
High Reduction

Objective: This study aimed to detect the prevalence of Listeria species in raw milk, ice cream and yogurt, and to evaluate the effect of extract of clove, thyme and pomegranate peel on such organism. Design: Descriptive study. Procedures: One hundred and fifty samples of milk, ice cream and yogurt were examined for isolation, identification and molecular identification of Listeria spp. Extraction of natural plant extract as clove, thyme and pomegranate peels and detection of their inhibitory effect on Listeria spp. Results: The prevalence of Listeria spp. in milk was 36% where 14% as L. monocytogenes, 6% L. innocua and 16% and other Listeria spp. was 16%. In yogurt, Listeria spp. was 6% as L. innocua was 2% and other Listeria spp. was 4%, while no L. monocytogenes was detected. In ice cream, Listeria spp. was 8% where L. monocytogenes was 2% and other Listeria spp. was 6% while no L. innocua was detected. The concentration of plant extract was 2.5% which showed high reduction rate on L. innocua and L. monocytogenes during shelf life of soft cheese. Conclusion and clinical relevance: Listeria is widely isolated from milk than from ice cream and yogurt. Plant extracts play role in food preservation and consider as a natural antimicrobial agent where most effective one was clove extract.

scholarly journals Multidrug-Resistant Listeria Species Shows Abundance in Environmental Waters of a Key District Municipality in South Africa

2021 ◽  
Vol 18 (2) ◽  
pp. 481
Author(s):  
Liyabona Mpondo ◽  
Kingsley Ehi Ebomah ◽  
Anthony Ifeanyi Okoh
Keyword(s):  
South Africa ◽  
Surface Waters ◽  
Multidrug Resistant ◽  
Eastern Cape ◽  
Environmental Waters ◽  
Potential Health ◽  
Phenotypic Resistance ◽  
Listeria Species ◽  
Polymerase Chain ◽  
Identification And Characterization

The prevalence of bacteria with multidrug-resistance (MDR) is a significant threat to public health globally. Listeria spp. are naturally ubiquitous, with L. monocytogenes particularly being ranked as important foodborne disease-causing microorganisms. This study aimed to evaluate the incidence and determine the antimicrobial resistance (AMR) profiles of multidrug-resistant Listeria spp. (MDRL) isolated from different environmental samples (river and irrigation water) in the Sarah Baartman District Municipality (SBDM), Eastern Cape Province (ECP), South Africa. Molecular identification and characterization were carried out using polymerase chain reaction (PCR) and isolates that exhibited phenotypic resistance were further screened for relevant antimicrobial-resistant genes (ARGs). Findings revealed a total of 124 presumptive Listeria isolates; 69 were molecularly confirmed Listeria species. Out of the confirmed species, 41 isolates (59%) were classified as L. monocytogenes while 9 (13%) were classified as L. welshimeri. All Listeria spp. exhibited phenotypic resistance against ampicillin, penicillin, and trimethoprim-sulphamethoxazole and further screening revealed ARGs in the following proportions: sulI (71%), blaTEM (66%), tetA (63%), and blaCIT (33%). Results confirmed the occurrence of ARGs among Listeria inhabiting surface waters of ECP. The present study indicates that the river water samples collected from SBDM are highly contaminated with MDRL, hence, constituting a potential health risk.

Optical forward-scattering for detection of Listeria monocytogenes and other Listeria species

2007 ◽  
Vol 22 (8) ◽  
pp. 1664-1671 ◽  
Author(s):  
Padmapriya P. Banada ◽  
Songling Guo ◽  
Bulent Bayraktar ◽  
Euiwon Bae ◽  
Bartek Rajwa ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Forward Scattering ◽  
Listeria Species

scholarly journals Prevalence of Listeria species in raw milk in Esfahan Province, Iran

2013 ◽  
Vol 7 (19) ◽  
pp. 2057-2060 ◽  
Author(s):  
Sohrabi Rafie ◽  
Rashedi Mojtaba ◽  
Panahi Dorcheh Mohsen ◽  
Masoud Shahbazi Amir
Keyword(s):  
Raw Milk ◽  
Listeria Species

16S rRNA partial gene sequencing for the differentiation and molecular subtyping of Listeria species

2013 ◽  
Vol 36 (2) ◽  
pp. 231-240 ◽  
Author(s):  
Rosalee S. Hellberg ◽  
Keely G. Martin ◽  
Ashley L. Keys ◽  
Christopher J. Haney ◽  
Yuelian Shen ◽  
...  
Keyword(s):  
16S Rrna ◽  
Gene Sequencing ◽  
Molecular Subtyping ◽  
Listeria Species

Identifying and modeling meteorological risk factors associated with pre-harvest contamination of Listeria species in a mixed produce and dairy farm

2017 ◽  
Vol 102 ◽  
pp. 355-363 ◽  
Author(s):  
Hao Pang ◽  
Rachel McEgan ◽  
Abhinav Mishra ◽  
Shirley A. Micallef ◽  
Abani K. Pradhan
Keyword(s):  
Risk Factors ◽  
Dairy Farm ◽  
Factors Associated ◽  
Listeria Species

Listeria monocytogenes in Raw Milk: Detection, Incidence, and Pathogenicity

1987 ◽  
Vol 50 (3) ◽  
pp. 188-192 ◽  
Author(s):  
J. LOVETT ◽  
D. W. FRANCIS ◽  
J. M. HUNT
Keyword(s):  
United States ◽  
Listeria Monocytogenes ◽  
Sampling Period ◽  
Raw Milk ◽  
The United States ◽  
Isolation Method ◽  
Listeria Species ◽  
Adult Mice ◽  
Listeria Ivanovii

To determine the incidence of Listeria monocytogenes in raw milk, an isolation method was evaluated and used to analyze milk from three areas of the United States. The incidence varied by area from 0% in California to 7% in Massachusetts, with an overall incidence of 4.2%. The highest incidence found in any area during a single sampling period was 12% in Massachusetts in March 1985. During that same sampling, the incidence for all Listeria species was 26%. Of the 27 L. monocytogenes strains isolated during the survey, 25 were pathogenic in adult mice. One of three Listeria ivanovii isolated was pathogenic. No other isolates demonstrated pathogenicity.

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