Data/hora: 27/07/2024 02:18:48

Provedor de dados: 	Brazilian Journal of Microbiology	
País: 	Brazil	
Título: 	Microbiological and chemical changes in freshwater prawn (Macrobrachium rosembergii) stored under refrigeration	
Autores: 	Leitão,Mauro Faber de Freitas; Rios,Daniel de Pinho Astacio.	
Data: 	2000-09-01	
Ano: 	2000	
Palavras-chave: 	Freshwater prawn; Shelf life; Indole.	
Resumo: 	Microbiological and chemical changes were evaluated in freshwater prawn stored under refrigeration at 0°C and 5°C during 10 days, with special emphasis on indole production as a chemical spoilage indicator. The total psychrotrophic and indole positive microflora were mainly mesophilic, with indole positive microorganisms being less than 10% of the total microflora after 10 days storage under refrigeration. Bacteria from Enterobacteriaceae and Vibrionaceae families prevailed among the isolated indole positive strains. The use of the Most Probable Number-MPN method, using tryptone broth as culture medium, was the most reliable approach for the quantitative evaluation of the indole positive microflora. The stored samples showed increases in pH, L-tryptophan and total volatile bases (TVB), which were more intensive at 5°C. The psychrotrophic counts and TVB values of samples stored at 0°C were lower than the recommended limits (107 CFU/g and 30 mg N/100g, respectively), even after 10 days storage. However, in samples stored at 5°C, these values were reached after 10 and 5 days, respectively. The presence of indole in levels above the limit recommended by FDA/USA (25 mug/100g) was confirmed in only one sample, suggesting that this substance, alone, wouldn’t be a good indicator of freshwater prawn quality stored under refrigeration.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300006	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822000000300006	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.31 n.3 2000	
Fonte: 	info:eu-repo/semantics/openAccess