Bacterial Contamination of Street-Vended Fruit Juice in Bangkok

Name: Dusanee Suttapreyasri

Organization : Mahidol University. Faculty of Public Health

Name: Suttiman Wattanasrirote

Name: Unchalee Tansuphasiri

Organization : Mahidol University. Faculty of Public Health

keyword: Contamination

; Bangkok

; Fruit juice

; Street-vendor

; Bacteria

Abstract: Thailand has an abundant supply of tropical fruits all-year-round. Street-vended fruit juice, which provides a convenient drink for pedestrians, costs only one-third to one-half that of canned fruit juice. The objective of this study was to investigate the contamination of indicator and pathogenic bacteria of eleven kinds of fruit juice sold in different sites in 6 districts in Bangkok, during February and March, 1996. One hundred and twenty-five samples of fruit juice were randomly sampled from street-vendors in food-markets, bus stations, railway stations, sidewalks, schools and universities. Both heated and cool processed fruit juice samples were collected in the morning and were analysed in the Faculty of Public Health's laboratory within 6 hours. Observation of street-vendors' sanitary practice and hygiene was noted using a prepared check-list. A membrane filter technique and biochemical test were used to identify genus and species of bacteria. The results showed that ninety-six per cent of the samples were contaminated with bacteria exceeding the standard Iimits,as heterotrophic plate count HPC, 90.4%; total coliforms, 86.4%; fecal coliforms, 57.6%; fecal streptococcus, 51.2%; and S.aureus, 76.0%. No salmonella, shigella and V.Cholerae were detected. Heated and cool processed fruit juice samples showed no significant difference in bacterial contamination, but S.aureusfound in heatedpreparations was significantly less than in cool-processed fruit juice. High-acid fruit juice (pH below 3.7) revealed significantly higher HPC, but significantly less S.aureus than the medium-acid (pH 3.8-5.3) and low-acid (pH above 5.3) fruit juice. Fruit juice collected from food markets showed significantly higher contamination with fecal coliforms than those collected from schools and universities. Significant positive association between indicator bacteria and 8.aureuswas found. Unsanitary cleaning and drying of containers and utensils were found at 62.4% and 48.0% respectively, including unhygienic handling (43.2%) and improper garbage/refuse disposal (62.4%). It is recommended that strict municipal sanitary regulation of streetvended fruit juice should be enforced. Training of street-vendors on safe processing, sanitary handling, cleaning, and storage of fruit juice should be promoted. Consumer education on food safety should also be provided.

Mahidol University. Mahidol University Library and Knowledge Center

Address: NAKHONPATHOM

Email: liwww@mahidol.ac.th

Created: 2013

Modified: 2013-03-15

Issued: 1999-01/06

บทความ/Article

application/pdf

Mahidol Journal. 6, 1 (Jan.-June 1999) 15-18

eng

Spatial: Bangkok

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