Oxytetracycline in tomatoes and agricultural antimicrobials and evaluation of residues in tomatoes grown in greenhouse and open field. / Oxitetraciclina em tomates e bactericidas agricolas e avaliaçao dos seus residuos em tomates produzidos em estufa e cultura de campo.

AUTOR(ES)

Patricia Penido Maia

DATA DE PUBLICAÇÃO

2007

RESUMO

Antimicrobials as fungicides and/or bactericides have been used for the improvement of the quality of vegetal products destined to the human feed and for its higher productivity in some phases of its cultivation, such as: preparation of the ground, growth, harvest, industrialization and commercialization. However, several of these compounds can remain as residues in consumed foods, and, depending on its toxicity and level of exposure, they can present a risk to the health of the consumer. Among these substances are the antibiotics used to combat or to prevent the appearance of alterations of microbial origin in the food. The development of analytical methods for the identification and quantification of these agents in vegetal products is of great interest, once the chronic exposure to low levels of antimicrobials can promote bacterial resistance to the antibiotics, as well as allergic reactions. Therefore, the present study aimed to develop a methodology for the isolation, identification and quantification of residues of oxytetracycline in tomato, which is very sensible to bacterioses, as well as was compared the residual levels found in fruits cultivated in greenhouse and open field. The developed analytical methodology was applied in the analysis of tomatoes purchased in the region of Campinas/SP and Alfenas/MG. The obtained data were compared with the maximum residue limits (MRLs) and the intervals of security established by the Brazilian legislation in conditions in the field. It was validated a method for quantification of antibiotics oxytetracycline and streptomycin in agricultural formulations used for treatment of tomatoes.

ASSUNTO(S)

oxitetraciclina estreptomicina antimicrobials tomates streptomycin antimicrobianos tomatoes oxytetracycline

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