|
|
Efficiency of different washing procedures on Surface decontamination of raw consumed vegetables.
|
|
Abstract: A total of 168 samples representing 24 samples of each of the following vegetables: tomato, cucumber, cress, green parsley, green coriander, green dill and lettuce were collected. Six samples of each were washed with tap water(with several changes of tap water then soaked in water for 15 min), 20% of the commercial vinegar that contain 6% acetic acid [1.2% acetic acid], 30% vinegar [1.8% acetic acid. These samples that treated with vinegar were firstly washed with water then soaked in either vinegar 30% [1.8% acetic acid] or vinegar 20%[ 1.2% acetic acid] for 30 min). Another six sample of each the used raw vegetables were washed with water then soaked in 1 g potassium permanganate per 1000 ml water for 15 min. All samples subjected to microbia! analysis before and after different treatments.
Salmonella were not detected in tomato samples. The percentage of Salmonella reduction on different tested commodity by using tap water was ranged between 33.3% to 100% . while the percentage of reduction in case of washing with 20% vinegar was ranged between 66.6% to 100%. On the other hand, the percentage of reduction in case of washing with 30% vinegar and 0.1 % potassium permanganates were 100%.
The effect of washing with tap water on total aerobic bacterial count, Enterobactericea, Coliform, Faecal (rhermotolerant) coliform and E coli were ranged from 7.9% up to 18.6% , 8.5% up to 40.9%, 8.3% up to 32.6% ,10.8% up to 24.1 % and 0% up to 51.02% respectively.
The effect of washing with 20% vinegar on total aerobic bacterial count, Enterobactericea, Colifor.m, Faecal (rhermotolerant) coliform and E coli were ranged from 13.1% up to 31.4%,16.1% up to 42.8% , 6.1% up to 39.9%,12.2% up to 40.3% and 2.1% up to 48.9% respectively. However, washing with 30% vinegar resulted in higher percentage of reduction of total aerobic bacterial count, Enterobactericea, Colifor.m, F. coliform and E. coli in all vegetable samples relative to washing with tap water, 20%vinegar 1.2% acetic acid and 0.1% potassium permanganate. The percentages of reduction on total aerobic bacterial count, Enterobactericea, Colifor.m, Faecal (Thermotolerant) coliform and E coli were ranged from, 26.8% up to 46.2%, 34.9% up to 60.2%,24.2% up to 59.3% ,30.6% up to 66.6% and 51.5% up to 100% , respectively.
|
| Publication year |
2005
|
| Pages |
689 - 702
|
| Availability location |
7 شارع نادى الصيد - الدقى - الجيزة(المعمل المركزى لتحليل متبقيات المبيدات والعناصر الثقيلة فى الأغذية)
|
| Availability number |
|
| Organization Name |
|
| serial title |
J. Adv. Agric.Res. (Fac. Agric. Saba Basha)
|
| Department |
Microbiology Analysis
|
| Author(s) from ARC |
|
| Agris Categories |
Plant diseases
|
AGROVOC
TERMS |
Salmonella.
|
| Proposed Agrovoc |
Plants--Microbiology.;Bacterial diseases of plants;
|
| Publication Type |
Journal
|