Occurrence of Staphylococcus and enteropathogens in soft cheese commercialized in the city of Rio de Janeiro, Brazil.
OBJECTIVE
To investigate the presence of Staphylococcus aureus, enteropathogenic Escherichia coli (EPEC), Aeromonas spp. and Yersinia spp. in soft cheese commercialized in Rio de Janeiro, Brazil.


RESULTS
A total of 45 samples of cheese from three different brands marketed in Rio de Janeiro city were analysed for faecal coliform levels using the Most Probable Number (MPN) technique. The samples were also analysed using conventional methodology for the investigation of food-borne pathogens. High levels of faecal contamination were detected in 95.5% of cheese samples. Staphylococcus aureus was isolated from 20% of samples, of which 17.7% were above the limits allowed by Brazilian legislation. Aeromonas hydrophila and Aer. caviae were detected in 17.7% of the samples. Yersinia spp. were not found in this study. EPEC was isolated from 21.1% of the samples and the most frequently found serogroups were O127, followed by O55 and O26.


CONCLUSIONS
Our results showed that 95.5% of cheese samples had high levels of faecal coliforms. The isolation of Staph. aureus, serogroups of EPEC and Aeromonas spp. suggested that the soft cheese commercialized in the city of Rio de Janeiro may represent a health risk for the consumers.


CONCLUSIONS
These results suggest that soft cheese may act as an important vehicle of transmission for well-established pathogens.
Araújo
V S
VS
Departamento de Patologia e Laboratórios, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Brasil.
Pagliares
V A
VA
Queiroz
M L P
ML
Freitas-Almeida
A C
AC
D000333:Aeromonas / Q000302:isolation & purification; D001938:Brazil; D002611:Cheese / Q000382:microbiology*; D004926:Escherichia coli / Q000302:isolation & purification*; D005506:Food Contamination / Q000706:statistics & numerical data*; D012499:Sanitation; D013211:Staphylococcus aureus / Q000302:isolation & purification*; D014504:Urban Health; D015007:Yersinia / Q000302:isolation & purification