Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 207 Document Number: D13037
Notes:
6 pages, Kefirs are fermented beverages containing yeast and bacteria produced by the fermentation of water or milk with kefir grains. Because microorganism density may influence a product's health benefits, label accuracy regarding viable bacterial density and taxonomy of fermented foods is important. In this study, the microbiota of 5 commercial kefir products were measured quantitatively using standard plating techniques and characterized using high-resolution, long-read 16S rRNA gene amplicon sequencing. To enumerate viable lactic acid bacteria, 2 lots of each product were plated on de Man, Rogosa and Sharpe agar upon opening and following 14 d and incubated under anaerobic and aerobic conditions. Results revealed that 66% of products with a guaranteed count of colony-forming units per gram overstated microorganism density by at least 1 log, with only product E exceeding 1 × 109 cfu/g. Sequencing results demonstrated moderate product label accuracy in regard to taxonomy, yet several products contained bacterial species above the minimum detectable threshold (0.001% relative abundance) that were not included on the labels (e.g., Streptococcus salivarius, Lactobacillus paracasei). Our results demonstrate a moderate level of labeling accuracy for commercial kefir products intended for human consumption. Regulatory agencies and consumers must continue to scrutinize these products and demand a higher level of accuracy and quality.
Via UI online subscription., This article discusses food fraud as not a phenomenon of modern times. The author notes that illegal manipulations occurred as soon as humankind started to trade with food. Examples feature various kinds of manipulations by ancient Greeks and Romans.
Via online issue. 2 pages., Introduction and description of Golden ARC Award in social media for the Moo Lab entry submitted by Midwest Dairy and FLM Harvest.
First published May 7, 2019. In press., We analyzed comedy series for food and beverage references, with particular attention to their type of presentation, along with the characteristics of actors associated with the references. Because the generally positive tone of comedy series can exert affective influence over audiences, the result that clearly unhealthy products appeared more often (food: 51.6%; beverage: 40.5%) than clearly healthy ones (food: 11.2%; beverage: 19.6%) could be especially problematic. Moreover, women (56.5%; men: 47.4%) and African American characters (62.7%; Caucasians: 51.5%; Other: 44.7%) were significantly more often associated with unhealthy foods, which could prompt stereotypes of such individuals.
