Microbiological survey of ready-to-eat foods and associated preparation surfaces in retail delicatessens, Johannesburg, South Africa

Christison, Claire Ashleigh; Lindsay, D.; Holy, A. von

doi:10.1016/j.foodcont.2007.07.004

Cited by 83 publications

(73 citation statements)

References 32 publications

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“…These bacterial count/ ranges are comparable to Viswanathan and Kaur (2001) who worked out for bacterial prevalence in a similar street vended food item. Likewise, Christison et al (2008) also reported high bacterial prevalence in filled baguettes and salads. These, and our study, clearly suggested reduced food safety of street vended fruits chats and salads which virtually remains the same, owing to the prevalent vending cultures and practices in most parts of the developing world.…”

Section: Bacterial Prevalencementioning

confidence: 86%

Prevalence and antibiotics susceptibility patterns of some bacterial isolates from a street vended fruit product

Farzana¹,

Akram²,

Mahmood³

2011

Afr. J. Microbiol. Res.

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The study is aimed to evaluate the food safety status of a street vended fruit product locally known as fruit chat. Sample collection was carried out from four groups of vendors which were discriminated based on their mobility, vending practice and storage facility. The extent of prevalence for Enterobacter species, Escherichia coli, Klebsiella species, Salmonella species, Staphylococcus aureus and S. epidermidis was assessed in fruit chat samples. Bacterial isolates were identified through biochemical characterization. The degree of susceptibility of these isolates was evaluated against six different antibiotics that is, amikacin, ampicillin, ciprofloxacin, gentamycin, ceftriaxone and co-trimoxazol using disc diffusion method. Results indicated a higher (10 5 to 10 10 CFU/g) total plate count (TPC) and total coliforms count (TCC) ranged from 10 4 to 10 9 CFU /g in samples collected from mobile vendors without covering. Mobility of vendors and, use of no covering, resulted in significant (P≤0.05) contamination. However, fruit chat samples collected from stationary vendors with refrigeration facilities exhibited considerably lower bacterial count. The study clearly indicated that consumption of fruit chats from street vendors can be a potential risk for food borne outbreaks because of their contamination level by pathogenic bacteria. Bacterial species had shown variable susceptibility and resistance patterns in response to different antibiotics used in the study. However, all bacterial species had shown greater sensitivity for amikacin, whereas, bacterial strains appeared to develop resistance against other commonly used antibiotics. The mounting resistance against antibiotics is currently one of the foremost challenges to treat food borne infections. Therefore, both preventative and effective curative measures should be adopted. Firstly, the safety status of street vended food products can be enhanced by improving hygienic conditions during the preparation of food stuff. Secondly, the use of effective antibiotics will be of significant importance to cure food borne infections as well as to avoid growing resistance in pathogenic bacteria.

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Section: Bacterial Prevalencementioning

confidence: 86%

Prevalence and antibiotics susceptibility patterns of some bacterial isolates from a street vended fruit product

Farzana¹,

Akram²,

Mahmood³

2011

Afr. J. Microbiol. Res.

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“…Foodborne bacterial pathogens commonly detected in RTE foods are Bacillus cereus, Clostridium perfringens, Staphylococcus aureus and Salmonella spp. (Muleta and Ashnafi, 2001;Mankee et al, 2005;Ghosh et al, 2007;Christison et al, 2008;Manguiat and Fang, 2013;Vecdet Öz et al, 2014). Certain foods sold by street vendors, e.g.…”

Section: Introductionmentioning

confidence: 99%

Bacteria associated with contamination of ready-to-eat (RTE) cooked rice in Lagos-Nigeria

Ogunyemi¹,

Buraimoh²,

Onuorah³

et al. 2016

Int. J. Bio. Chem. Sci

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The bacteria associated with contamination of ready-to-eat (RTE) cooked rice in Lagos, Nigeria were studied using standard microbiological methods. The objective of this study was to investigate the distribution of pathogenic bacteria recovered from RTE cooked rice in Lagos, assess bacteria load in the contaminated RTE cooked rice and evaluate their microbial quality. The microbial load of the RTE cooked rice ranged from 1.5 ± 0.29x 10 4 -4.8 ± 0.46x 10 6 cfu/g for three markets. A further test revealed that the average bacteria counts at Ketu was significantly different from those at Yaba and Odogunyan. However it was found that counts at Yaba and Odogunyan were not significantly different. Based on the specification by the International Microbiological Standard limits for Foods (IMSF), the levels of contamination of the total samples that were above and below microbiological acceptable limit were 91.7% and 8.3% respectively. The predominant pathogenic bacteria associated with contamination of the RTE cooked rice samples were identified as Staphylococcus aureus, Brahamella sp, Enterobacter aerogenes and Salmonella typhi. Out of a total of 36 RTE cooked rice samples analyzed, Enterobacter aerogenes 36 (100%) had the highest occurrence followed in descending order by Staphylococcus aureus 33 (91.7%), Brahamella sp. 29 (80.6%) and Salmonella sp. 25(69%). The results indicated that most of the RTE cooked rice samples examined in this study did not meet bacteriological quality standards. These findings suggest that the presence of food pathogens in RTE rice hawked in our local markets may pose serious potential health risks to the consumers in the public.

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“…A few investigations have been conducted in South Africa to ascertain the contamination of chicken carcasses and ready-to-eat foods from retail stores, with various pathogenic bacteria including Salmonella. 13,14 However, the incidence of NTS in broiler products in the North West Province (NWP) has not been established despite the fact that the NWP is one of the provinces with the largest production and distribution of broilers in the country. The objective of this study therefore was to screen raw and ready-to-eat broiler products obtained from the NWP of South Africa for incidence of NTS contamination.…”

Section: Introductionmentioning

confidence: 99%

Incidence of non-typhoidal Salmonella in poultry products in the North West Province, South Africa

Olobatoke¹,

Mulugeta²

2015

S. Afr. J. Sci.

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This study was conducted to evaluate the incidence of non-typhoidal Salmonella (NTS) serotypes in raw and ready-to-eat (RTE) broiler products in the North West Province of South Africa. A total of 120 raw broiler samples, 40 samples of polonies and 20 samples of smoked viennas were obtained from retail points in major cities and towns in the province. Samples were subjected to aerobic plate count and later screened for the presence of NTS using phenotypic and genotypic techniques. The average bacterial count in raw products was 3.1 x 10 5 cfu/g whereas bacterial contamination of RTE products was 1.8 x 10 3 cfu/g. The average recovery rate of NTS species from raw broiler products was 12.5% and the serotypes identified were S. typhimurium (46.4%), S. enteritidis (30.9%) and S. newport (22.9%). No NTS was recovered from the RTE products. However, S. typhimurium was the predominant serotype in whole carcasses whereas S. enteritidis and S. newport were prevalent in chicken parts. Out of the 160 presumptive NTS isolates screened by polymerase chain reaction (PCR), 140 (87.5%) were confirmed for the presence of the Salmonella-specific invA gene. In addition, 115 (82.4%) of the confirmed isolates harboured the plasmid spvC gene. Random Amplified Polymorphic DNA (RAPD) fingerprinting of isolates using RAPD 1 and RAPD 3 primers, revealed some inter-and intra-serotype genetic diversity among isolates, suggesting varying sources of contamination. The results of this study represent the first report on the incidence and prevalent serotypes of NTS in chicken products in the North West Province of South Africa.

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Microbiological survey of ready-to-eat foods and associated preparation surfaces in retail delicatessens, Johannesburg, South Africa

Cited by 83 publications

References 32 publications

Prevalence and antibiotics susceptibility patterns of some bacterial isolates from a street vended fruit product

Prevalence and antibiotics susceptibility patterns of some bacterial isolates from a street vended fruit product

Bacteria associated with contamination of ready-to-eat (RTE) cooked rice in Lagos-Nigeria

Incidence of non-typhoidal Salmonella in poultry products in the North West Province, South Africa

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