A study on prevalence of microbial contamination on the surface of raw salad vegetables

Mritunjay, Sujeet Kumar; Kumar, Vipin

doi:10.1007/s13205-016-0585-5

Cited by 55 publications

(61 citation statements)

References 30 publications

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“…A higher count was reported earlier by Kubheka et al [29] in South Africa, as the 55 salads collected from street vendors had an ACC mean value of 5.9 (±0.6) log CFU/g and the count ranged between 2.7 and 8.9 log CFU/g. Another higher ACC mean value was reported in a study done in India by Mritunjay and Kumar [30] , where a total of 480 samples of eight different raw salad vegetables from local markets had a mean AMC of 6.1 log CFU/g, ranging from 2.0 to 9.6 log CFU/g.…”

Section: Discussionmentioning

confidence: 67%

Bacteriological assessment of some vegetables and ready-to-eat salads in Alexandria, Egypt

Abaza

2017

EPX

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Background: Fresh vegetables and ready-to-eat salads (RTES) are essential components of human diet. Despite their benefits, they remain a major public health concern, because they have been implicated in foodborne illness outbreaks in numerous countries. Aim: The present study aimed to assess the bacteriological quality of some fresh vegetables and RTES in Alexandria, Egypt. Materials and Methods: This cross-sectional study included 121 samples of vegetables and RTES that were randomly purchased from different markets, restaurants, and street vendors in three districts in Alexandria. All samples were subjected to heterotrophic plate count using pour plate method; detection and enumeration of total coliforms, fecal coliforms and Escherichia coli by multiple tube dilution method; and isolation and detection of Salmonella spp. using standard microbiological methods. Results: The aerobic colony count (ACC) for the 71 tested fresh vegetable samples ranged from 2.0 to 10.4 log CFU/g. Green pepper had the highest ACC mean value (8.4 log CFU/g), whereas lettuce showed the lowest ACC mean (5.1 log CFU/g). Fecal coliforms were detected in 90.1% of tested vegetable samples and 66% of the examined RTES samples. Of the 22 street-vended RTES samples, 18.2% were significantly unsatisfactory regarding E. coli. Salmonella spp. was not detected in any of the examined samples. Conclusion: All examined samples were contaminated and yielded growth of aerobic mesophilic bacteria with varying densities. According to the Public Health Laboratories guidelines, only street-vended RTES samples yielded unsatisfactory levels of E. coli, which indicates the need for close supervision and regular inspection of hygienic practices and preparation methods of street-vended salads.

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Section: Discussionmentioning

confidence: 67%

Bacteriological assessment of some vegetables and ready-to-eat salads in Alexandria, Egypt

Abaza

2017

EPX

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“…; Korir et al . ; Mritunjay and Kumar ). However, a study conducted in India reported high prevalence (39·2%) of E. coli in fresh produce (Viswanathan and Kaur ).…”

Section: Discussionmentioning

confidence: 96%

“…In our study, the low prevalence (5·1%) of Salmonella in vegetables/fruits is corroborated with other studies, where this pathogen was detected at 4·0% (Singh et al . ; Mritunjay and Kumar ). One of the studies conducted in India on raw produce, reported much higher (28·1%) prevalence of this pathogen (Viswanathan and Kaur ).…”

Section: Discussionmentioning

confidence: 96%

Phenotypic and virulence traits ofEscherichia coliandSalmonellastrains isolated from vegetables and fruits from India

et al. 2018

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“…Similarly, Sabbithi et al (2014) reported that 58.5% of the carrots used in the salads sold as street food in Hyderabad, India, were contaminated with Salmonella. In Dhanbad, India, 3.3% of the carrots collected from the local market were contaminated with Salmonella (Mritunjay and Kumar, 2017).…”

Section: Full Papermentioning

confidence: 99%

“…Apart from Salmonella, other microbial pathogens such as E. coli, L. monocytogenes, S. aureus, may grow in cabbages (Mritunjay and Kumar, 2017). According to the studies done by Prazak et al (2002) and Kuan et al (2017), 4.7% and 18.2% of cabbages were contaminated by L. monocytogenes in Texas, United States and Selangor, Malaysia respectively.…”

Section: Full Papermentioning

confidence: 99%

Detection and quantification of Salmonella in fresh vegetables in Perak, Malaysia

et al. 2019

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The eating of fresh and minimally processed vegetables is getting popular among Malaysians. This trend poses an increased risk of food poisoning associated with the consumption of fresh produce contaminated with pathogenic bacteria. Salmonellosis is a foodborne disease caused by several non-typhoidal Salmonella enterica serovars, predominantly serovars Enteritidis and Typhimurium. The present study aimed to determine the prevalence of Salmonella spp., S. enterica serovar Enteritidis and S. enterica serovar Typhimurium in fresh leafy vegetables such as cabbages (n = 40), lettuces (n = 20), and fruit vegetables such as tomatoes (n = 40), carrots (n = 40) and cucumbers (n = 40), which were sold by three different hypermarkets and a wet market in Kampar, Perak, Malaysia. The study was performed over a period of 13 months (January 2018 to January 2019). A combination of most probable number-multiplex polymerase chain reaction (MPN-mPCR) method was used to quantify the concentrations of Salmonella spp., S. enterica serovar Enteritidis and S. enterica serovar Typhimurium in the examined samples. The results of this study demonstrated that of the vegetables tested, tomatoes, carrots and lettuces were not contaminated by Salmonella spp., S. enterica serovar Enteritidis and S. enterica serovar Typhimurium. However, the presence of Salmonella spp. was detected in 3.3% of cabbages from the hypermarket, with estimated microbial loads ranging from <3.0 MPN/g to 15.0 MPN/g. On the other hand, S. enterica serovar Typhimurium was detected in 10.0% of the cucumbers from hypermarkets and 20% of them from the wet market. Their microbial loads were ranging from <3.0 MPN/g to >1,100 MPN/g. This indicated that cabbages and cucumbers could be the potential sources of salmonellosis. Therefore, the monitoring of food safety and hygienic practices should be strictly enforced by relevant government agencies to avoid potential poisoning by foodborne pathogens.

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A study on prevalence of microbial contamination on the surface of raw salad vegetables

Cited by 55 publications

References 30 publications

Bacteriological assessment of some vegetables and ready-to-eat salads in Alexandria, Egypt

Bacteriological assessment of some vegetables and ready-to-eat salads in Alexandria, Egypt

Phenotypic and virulence traits ofEscherichia coliandSalmonellastrains isolated from vegetables and fruits from India

Detection and quantification of Salmonella in fresh vegetables in Perak, Malaysia

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