Author:
Duque-Rodríguez Angie Dahiana,Cordeiro Andressa de Almeida,Caldeira Estefânia Claudia,Olimpio Beatriz Rodrigues,Fernandes Patrícia Erika,Pena Wilmer Edgard Luera
Abstract
Dairy desserts are commercially sold refrigerated products that are widely consumed due to their nutritional characteristics, practicality, and sensory appeal. Their deterioration is related to changes in texture, odor, and the production of off-flavors caused by spore-forming bacteria and other contaminating bacteria that produce heat-stable spoilage enzymes. This study aimed to determine the presence of spore-forming bacteria in three types of dairy desserts, which were subjected to thermal shock to induce the germination of bacterial spores. The ability of vegetative cells to grow under different conditions, as well as the synthesis of proteolytic enzymes and their multiplication rates, were evaluated. The results indicated a higher occurrence of mesophilic aerobic bacteria with higher proteolytic and lipolytic activity, and a higher growth rate. Twenty isolates showed statistically significant differences (P<0.05), exhibiting superior capacity for synthesis of enzymes and growth rate. These isolates were genetically identified as B. subtilis, B. cereus, B. thuringiensis, B. tequilensis and B. parabrevis. These results reinforce the necessity for control measures against spore-forming aerobic mesophilic or thermoduric bacteria to ensure quality. Therefore, production losses, reduced shelf life, damage to brand reputation, and sales losses continue to be challenge for the Brazilian dairy industry.
Publisher
South Florida Publishing LLC
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference28 articles.
1. . Nikaedo PHL, Amaral FF, Penna ALB. (2004). Technological characterization of creamy chocolate milk desserts made with whey protein concentrate and mixtures of carrageenan and guar gums. Braz. J. Pharm. Sci. 40:397-404.
2. . Saunders AB. (2016). Dairy Desserts, Reference Module in Food Science, Elsevier, https://doi.org/10.1016/B978-0-08-100596-5.00831-3.
3. . Market Research Future Dairy Desserts Market. (2022) Dairy Desserts Market Research Report Information by Type (Ice creams, Yoghurt, Custards, and Others), Distribution Channel [Store-Based (Supermarkets & Hypermarkets, Convenience Stores, and Others) and Non-Store-Based], and Region (North America, Europe, Asia-Pacific, and RoW) – Forecast till 2027 http://www.marketresearchfuture.com/reports/dairy-desserts-market-5166. Accessed 07 de November of 2022.
4. . André S, Vallaeys T, Planchon S. (2017). Spore-forming bacteria responsible for food spoilage. Res. Microbiol. 168(4):379-387.
5. . Machado SG, Baglinière F, Marchand S, Van Coillie E, Vanetti MC, De Block J, Heyndrickx, M. (2017). The biodiversity of the microbiota producing heat-resistant enzymes responsible for spoilage in processed bovine milk and dairy products. Front Microbiol 8:302.