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Anti-staphylococcal effectiveness of nisaplin in refrigerated pizza doughs

By Wilma Carla de Freitas, Evandro Leite de Souza, Cristina Paiva de Sousa and Antônio Eustáquio Resende Travassos

Abstract

This study evaluated the effectiveness of nisaplin, commercial product having nisin as active component, in decreasing the staphylococcal population in refrigerated pizza doughs. The refrigerated pizza dough pieces randomly chosen were dipped in the solutions with nisaplin concentrations of 1.0 x 10-3 g and 1.0 x 10-2 g nisaplin/mL named for the treatment A and B and kept under refrigeration (7 °C ± 1 °C). On times 0, 15 and 30 days post treatment the Staphylococcus spp. count was carried out. The results showed that both nisaplin treatments were able to reduce the Staphylococcus spp. count (CFU/g) in the refrigerated pizza doughs. However, only treatment B showed statistically significant reducer effect (p < 0.05) on the count providing a decrease of 1.0 and 0.98 log cycles, respectively, after 15 and 30 days post treatment. These data suggest that nisin could appear as promising alternative to control the survival of the pathogen microorganisms in the foods, particularly, Staphylococcus in the refrigerated pizza doughs.<br>Este estudo avaliou a efetividade de nisaplin, produto comercial tendo nisina como componente ativo, em diminuir a população estafilocócica em massas de pizza refrigeradas. Pedaços de massa de pizza refrigerada foram randomicamente escolhidos e mergulhados em soluções de nisaplin com concentração de 1.0 10-3 g e 1.0 10-2 g nisaplin/mL, nomeados, respectivamente, tratamento A e B, e mantidos sob refrigeração (7 °C ± 1°C). Nos tempos 0, 15 e 30 dias pós-tratamento foram feitas as contagens de Staphylococcus spp. Os resultados mostraram que ambos os tratamentos diminuíram a contagem (UFC/g) de Staphylococcus spp. em massas de pizza refrigeradas. Entretanto, somente o tratamento B mostrou um efeito redutor estatisticamente significante (p < 0.05) sobre a contagem de Staphylococcus spp. causando uma diminuição de 1.0 e 0.98 ciclos logarítmicos, respectivamente, nos tempos 15 e 30 dias pós tratamento. Estes dados sugerem que nisina poderia apresentar-se como uma promissora alternativa para controlar o a sobrevivência de microrganismos patógenos em alimentos, particularmente, espécies de Staphylococcus em massas de pizza refrigerada

Topics: Nisaplin, nisin, dough, Staphylococcus, Biotechnology, TP248.13-248.65, Chemical technology, TP1-1185, Technology, T, DOAJ:Biotechnology, DOAJ:Life Sciences, DOAJ:Biology and Life Sciences
Publisher: Instituto de Tecnologia do Paraná (Tecpar)
Year: 2008
DOI identifier: 10.1590/S1516-89132008000300021
OAI identifier: oai:doaj.org/article:57c8d70674424155bd7d2fac083761b3
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