Document Detail


Behavior and enterotoxin production by coagulase negative Staphylococcus in cooked ham, reconstituted skimmed milk, and confectionery cream.
MedLine Citation:
PMID:  21535559     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
In this study, the behavior and enterotoxin production by 10 different coagulase negative Staphylococcus (CNS) strains inoculated in cooked ham, reconstituted skimmed milk, and confectionery cream in the presence or absence of background microbiota have been investigated. After inoculation (103 CFU/g), foods were incubated at 25, 30, and 37 °C and aerobic mesophilic and CNS counts were carried out at 12, 24, 48, and 72 h. Staphylococcal enterotoxins (SE) detection was performed by SET-RPLA (Oxoid, Basingstoke, U.K.) and mini-Vidas® (bioMérieux, La Balme les Grottes, France). CNS counts increased during incubation and approached 106 to 107 CFU/g after 12 h at 37 °C in the 3 foods studied. At 25 °C, counts reached 106 to 107 CFU/g only after 24 to 48 h. The interference of background microbiota on CNS behavior was only observed when they grew in sliced cooked ham, which presented a high initial total count (105 CFU/g). Significantly higher counts of CNS isolated from raw cow's milk in comparison with food handlers isolates were found in reconstituted milk and confectionery cream. Although CNS strains were able to produce SEA, SEB, and SED in culture media, in foods, in the presence or absence of background microbiota S. chromogenes LE0598 was the only strain able to produce SEs. Despite the scarcity of reports on CNS involvement with foodborne disease outbreaks, the results found here support the CNS growth and SE production in foods even in the presence of background microbiota and may affect food safety.
Authors:
Ana Maria Oliveira; Norma Teruko Nago Miya; Anderson S Sant'ana; José Luiz Pereira
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of food science     Volume:  75     ISSN:  1750-3841     ISO Abbreviation:  J. Food Sci.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2011-05-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0014052     Medline TA:  J Food Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  M475-81     Citation Subset:  IM    
Affiliation:
Authors Oliveira, Miya, and Pereira are with Dept. of Food Science, Faculty of Food Engineering, Univ. of Campinas (UNICAMP), Campinas, SP, Brazil. Author Sant'Ana is with Dept. of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, Univ. of São Paulo (USP), São Paulo, SP, Brazil. Direct inquiries to author Pereira (E-mail: pereira@fea.unicamp.br).
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