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Type: Artigo de periódico
Title: Enterotoxigenic Profile, Antimicrobial Susceptibility, And Biofilm Formation Of Bacillus Cereus Isolated From Ricotta Processing
Author: da Silva Fernandes M.
Fujimoto G.
Schneid I.
Kabuki D.Y.
Kuaye A.Y.
Abstract: Sources of Bacillus cereus contamination in a ricotta processing plant were evaluated. In addition, the enterotoxigenic potential, antimicrobial susceptibility, and biofilm formation of the isolates were verified. B.cereus was detected in raw materials, environmental samples (mould, press, storage box, packaging table, and whey sewage drain), and product. From a total of 42 B.cereus isolates, 38.1% and 92.9% were positive for the haemolysin BL and non-haemolytic enterotoxin gene complexes, respectively. All isolates were resistant to ampicillin, penicillin, and trimethoprim; 9.5% were resistant to erythromycin. B.cereus formed a biofilm after 4d at 25°C and after 1d at 39°C, with counts of 5.0 and 5.1logcfucm-2, respectively. During biofilm maturation, an increase in the number of B.cereus spores occurred. However, the biofilm was not formed over 8d of incubation at 7°C as the B.cereus isolates were not psychrotrophic. © 2014 Elsevier Ltd.
Editor: Elsevier Ltd
Rights: fechado
Identifier DOI: 10.1016/j.idairyj.2014.03.009
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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