Essentials of the assessment of the hygienic condition of food factories and their products

Mossel, D. À. A.

doi:10.1002/jsfa.2740150601

Cited by 15 publications

(4 citation statements)

References 82 publications

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“…As with the pure cultures, nitrite formation was faster than depletion of glucose. This agrees with the well known intensive nitrate reductase activity of virtually all Enterobacteriaceae (Mossel, 1964). Also the data of Fig.…”

Section: Pure Culture Studiessupporting

confidence: 92%

“…Dye reduction tests (Rao and Murthy 1986) seemed to be the first choice, but attempts to apply this principle to selective counts could not be found in the literature. On the other hand, nitrate reduction, also having a long standing use in clinical (Sleigh, 1965, Monteverde andNosanchuk, 198 1, Oneson andGroschel, 198.5, Wilkins et al, 1985) and diary microbiology (Crawley and Twomey, 1969), could be made specific (Mossel, 1964;Crawley and Twomey, 1969). Bomar (1983) suggested the use of an additional glucose dissimilation test to also include in nonspecific counts bacteria failing to reduce nitrate.…”

Section: Introductionmentioning

confidence: 99%

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Rapid Detection of Excessive CFU Counts of Enterobacteriaceae, S. aureus and Yeasts by Nitrate Reduction/Glucose Dissimilation (NGD) Monitoring in Selective Media

Netten¹,

Mossel²,

Moosdijk³

1987

Journal of Food Science

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A technique was developed for the approximate selective estimation of CFU loads of thermotrophic Enterobacteriaceae and S. aureus in foods and meals, relying on rate of nitrate reduction and glucose dissimilation (NGD test) in lauryl sulfate nitrate glucose broth and modified liquid Baird Parker medium with nitrate and glucose added, respectively, both incubated at 42.5"C. Yeast CFU could be assessed similarly in oxytetracyclin gentamicin glucose broth at 30°C. The fate of nitrate and glucose was monitored by urinanalysis dip sticks. Response times were 7 and 2 hr for CFU levels of IO5 and 10s g-', respectively, allowing feedback to production lines within one working day. The procedure requiring no other instrumentation than a centrifuge, also has been applied successfully as a field test procedure.

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Section: Pure Culture Studiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Rapid Detection of Excessive CFU Counts of Enterobacteriaceae, S. aureus and Yeasts by Nitrate Reduction/Glucose Dissimilation (NGD) Monitoring in Selective Media

Netten¹,

Mossel²,

Moosdijk³

1987

Journal of Food Science

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“…A. Mossel for this purpose. This medium allows the quantitative development of all Lactobacillaceae, fastidious types included (Mossel, 1964).…”

Section: Holtzaandtel and D A A Mosselmentioning

confidence: 99%

The survival of pathogenic bacteria in, and the microbial spoilage of, salads, containing meat, fish and vegetables

Holtzapffel¹,

Mossel

1968

Int J of Food Sci Tech

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An investigation was carried out on the: fate at 9" and 20°C of: (i) two types of non-spore-bearing bacteria, causing food-borne disease, viz. Staphylococcus aureus and Salmonella spp., and two spore-bearing enteropathogens !Clostridiumperfringens and Bacillus cereus) ; and (ii) Lactobacillaceae and yeasts in one type of meat and vegetable salad (pH --4.2, acetic acid content 0.5%) and in one type of shrimp salad (pH == 5.3, acetic acid content 0.3%), preserved at two levels of benzoic acid plus sorbic acid. The pathogens were inoculated at initial densities of 1 04--109/g; for lactic acid bacteria and yeast reliance was placed on naturally occurring organisms.The non-spore-bearing pathogens died out under all conditions, albeit much faster at 20°C. Spore-bearing cells of the Bacillaceae tested remained mostly dormant under the conditions of the tests. Lactobacillacea.e developed fast, also at 9°C and eventually caused souring of the products. Yeasts appeared to play a role at 3°C only. The main antibacterial effect of the salads was demonstrated to be due to its vinegar content and pH.

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“…Although Lachica and Hartman did not report any lack of selectivity for their TAC agar, other investigators have reported that thallium-containing media allow the growth of unwanted micrococci and group N streptococci (1,8).…”

mentioning

confidence: 91%

Evaluation of Thallium Acetate-Citrate Medium for Isolation of Enterococci1

Bulich¹,

Hartman²

1969

Applied Microbiology

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Essentials of the assessment of the hygienic condition of food factories and their products

Cited by 15 publications

References 82 publications

Rapid Detection of Excessive CFU Counts of Enterobacteriaceae, S. aureus and Yeasts by Nitrate Reduction/Glucose Dissimilation (NGD) Monitoring in Selective Media

Rapid Detection of Excessive CFU Counts of Enterobacteriaceae, S. aureus and Yeasts by Nitrate Reduction/Glucose Dissimilation (NGD) Monitoring in Selective Media

The survival of pathogenic bacteria in, and the microbial spoilage of, salads, containing meat, fish and vegetables

Evaluation of Thallium Acetate-Citrate Medium for Isolation of Enterococci1

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