Laboratorial method validation : evaluation of BAX system Trade Mark for Salmonella sp in food for polymerase chain reaction. / Validação de metodos laboratoriais : avaliação do sistema BAX Marca Registrada de analise de Salmonella sp em alimentos por reação de polimerase em cadeia (PCR).

AUTOR(ES)

Marta Mitsui Kushida

DATA DE PUBLICAÇÃO

2005

RESUMO

Salmonella sp is one of most important food born microorganism in all the world, and it always has been focused among international public health organs. The food analysis for this pathogen is a subject of routine in all food quality control laboratories, and, besides there are several alternative methods for Salmonella sp detection, but most of the laboratories still work with the traditional technique of detection, which is very expensive and time consuming. The barrier to alternatives methods is the fact that most of them are considered presumptive, and need the traditional technique to confirm the positives results. An alternative technique that does not present the step of confirmation was recently, introduced in Brazil, the BAX? System for Salmonella sp, which works by polymerase chain reaction (PCR). It is a very quick detection method, safety, accurate which shows the analysis result in 30 hours, utilizing very few manipulation of samples, since is automatized. The substitution of traditional Salmonella sp detection method for BAX system, can increase significantly the laboratories analysis capacity, but as it is a very new technique, is still unknown in our country. In despite of this, it is important to evaluate its performance in Brazilian food products, which is the aim of this research. A evaluation of BAX system, compared with the Salmonell traditional method was then carried out, using 708 samples of 22 different food categories. The results showed sensibility of 100%, specificity of 98,6%, falsepositives ratio of 1,4% and false-negatives ratio of 0% for BAX system .

ASSUNTO(S)

food validação de metodo salmonella salmonella method validation alimentos

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