Prevalence of Listeria species in Fresh Salad Vegetables and Ready-to-Eat Foods Containing Fresh Produce Marketed in Canterbury, New Zealand

Zhu, Qi; Hussain, Malik Altaf

doi:10.17140/aftnsoj-1-102

Cited by 11 publications

(8 citation statements)

References 14 publications

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“…further attributed this to the presence of glucose, a fermentable sugar that can be readily utilized by the organism. The low incidence of L. monocytogenes in the carrots also agreed with the fi ndings ofIeren et al ( 2013 ) who found only 2.2% of L. monocytogenes isolates in carrots from fi ve markets in Zaria metropolis Zhu and Hussain ( 2014 ). also reported a low incidence of Listeria spp in carrots sold in Canterbury markets, New Zealand.…”

supporting

confidence: 86%

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The incidence and distribution of Listeria monocytogenes in ready‐to‐eat vegetables in South‐Western Nigeria

Ajayeoba

Atanda

Obadina

et al. 2015

Food Science & Nutrition

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The study investigated the incidence of Listeria monocytogenes in ready‐to‐eat (RTE) vegetables: (Cucumber, Cucumis sativas; Cabbage, Brassica olerecea; Carrot, Daucus carota; Tomato, Solanum lycopersicum; Lettuce, Lactuca sativa) in six states in South‐Western Nigeria. A total of 555 composite samples were collected from 30 traditional markets within the states and only 244 L. monocytogenes species were isolated by standard methods. The incidence of L. monocytogenes was low and not statistically significant per vegetable type. The percentage distribution of the L. monocytogenes isolates in the RTE vegetables was 28.28, 9.02, 23.36, 19.67, and 19.67 for Cabbage, Carrot, Cucumber, Lettuce, and Tomatoes, respectively. Lagos state had the highest incidence of L. monocytogenes contamination (55%) followed by Ondo (48.89%), Oyo (48.75%), Ogun (44.09%), Osun (34.38%), and Ekiti (33.33%) states, respectively. Although the incidence of L. monocytogenes in the RTE vegetables in South‐Western Nigeria is low, its presence should be a source of concern as it could constitute a public health threat for its consumers.

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supporting

confidence: 86%

“…() who found only 2.2% of L. monocytogenes isolates in carrots from five markets in Zaria metropolis. Zhu and Hussain () also reported a low incidence of Listeria spp in carrots sold in Canterbury markets, New Zealand. Similar results were obtained by Sant'Ana et al.…”

Section: Discussionmentioning

confidence: 95%

The incidence and distribution of Listeria monocytogenes in ready‐to‐eat vegetables in South‐Western Nigeria

Ajayeoba

Atanda

Obadina

et al. 2015

Food Science & Nutrition

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“…were commonly detected in cabbage and lettuce samples. 16 Sample collection from retail shops did not seem to be influenced by seasonal changes. Therefore, all fresh produce from retail shops were collected over 6-weeks.…”

Section: Discussionmentioning

confidence: 96%

Detection of Listeria Species in Fresh Produce Samples from Different Retail Shops in Canterbury, New Zealand

Zhu¹,

Gooneratne²,

Hussain³

2016

Adv Food Technol Nutr Sci Open J

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“…Another study reported the prevalence of Listeria spp. in four, common fresh produce (lettuce, carrot, purple cabbage, and green cabbage) over a 5-week period; samples were collected from two markets in New Zealand every week (Zhu & Hussain, 2015). Frequency of Listeria spp.…”

Section: Microbial Surveymentioning

confidence: 99%

“…compared to other produce types, data suggested Listeria spp. were generally prevalent in fresh produce (Zhu & Hussain, 2015).…”

Section: Microbial Surveymentioning

confidence: 99%

In Vitro Recapitulation of Functional Microvessel Using Microfluidic Platform

Li¹

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Microbial quality and pathogen decontamination strategies for locally-grown, fresh produce from West Virginia and Kentucky Ka Wang Li This study aimed to evaluate the microbiological quality/safety of fresh produce from farmers' markets (FM) and assess the post-harvest washing practice with antimicrobials to inactivate Salmonella and Listeria monocytogenes on fresh produce. In study I, 212 produce samples were tested for the presence of Salmonella and Listeria spp. using modified FDA-BAM methods. Aerobic plate counts (APCs), total coliforms (TCCs), and yeast/molds were analyzed on petri-films. Among the 212 samples, the APCs, TCCs, and yeast/molds were 3.72-5.63, 3.67-5.47, and 3.07-4.13 log CFU/g, respectively, with spinach containing the highest (P<0.05) populations. Among all tested samples, Salmonella enterica spp. enterica was detected on 18.6% of spinach, 10.9% of tomatoes, 18.5% of peppers, and 56.3% of cantaloupes, which is much higher than previous reported. Only 3.78% of the samples were confirmed for Listeria spp., and 50% of them were identified as L. monocytogenes, based on multiplex PCR results. Due to the high percentage of pathogens detected on the farmers' marker produce, an evaluation of postharvest produce washing with various antimicrobials was conducted in study II. Specifically, spinach, tomatoes, green peppers and cucumbers were inoculated with S. Typhimurium and Tennessee or L. monocytogenes and washed in tap water, vinegar water (10%), lactic acid (5%), a lactic and citric acid blend (2.5%), and sodium hypochlorite (200 ppm) for 30 sec or unwashed. Vinegar water (10%) showed better (P<0.05) reduction of S. Typhimurium and Tennessee on tomatoes and cucumbers, and L. monocytogenes on tomatoes and peppers than tap water. The three antimicrobials reached an additional reduction level of 0.9 to 2.7 (S. Typhimurium and Tennessee) and 0.2 to 1.4 log CFU/g (L. monocytogenes) compared to tap water. Lactic acid caused the greatest (P<0.05) reduction of S. Typhimurium and Tennessee on spinach and green peppers, and sodium hypochlorite showed the greatest (P<0.05) reduction of L. monocytogenes on cucumbers. These results provide important information for FM vendors to develop postharvest protocols to control foodborne pathogens.

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Prevalence of Listeria species in Fresh Salad Vegetables and Ready-to-Eat Foods Containing Fresh Produce Marketed in Canterbury, New Zealand

Cited by 11 publications

References 14 publications

The incidence and distribution of Listeria monocytogenes in ready‐to‐eat vegetables in South‐Western Nigeria

The incidence and distribution of Listeria monocytogenes in ready‐to‐eat vegetables in South‐Western Nigeria

Detection of Listeria Species in Fresh Produce Samples from Different Retail Shops in Canterbury, New Zealand

In Vitro Recapitulation of Functional Microvessel Using Microfluidic Platform

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