Resistencia bacteriana y calidad microbiológica de néctares de frutas distribuidos por el gobierno en 5 parroquias de la ciudad de Riobamba

Abstract

The objective of this research project was to conduct a microbiological analysis and bacterial resistance of fruit nectars distributed by the government in 5 parishes in the city of Riobamba to verify their microbiological quality. The microbiological indicators that were analyzed to determine the microbiological quality were total coliforms, fecal coliforms, mesophilic aerobes, molds and yeasts using 3M Petrifilm plates, and the bacterial resistance profile was done using the agar diffusion method according to Kirby Bauer. By means of this methodology, the total coliform count was obtained, which remained within the normative standard, having a slight growth in only 1 sample, which was not significant according to NTE INEN 2337, as for fecal coliforms, no growth was obtained in all the samples of the provinces analyzed, as well as for molds and yeasts, which remained within the microbiological parameter of zero growth, and finally, for mesophilic aerobes, growth was obtained in 3 samples, which remained within the range allowed by the respective standard. For the identification of the microorganisms obtained, biochemical tests were done, with the growth of one colony, Escherichia coli. It was concluded that the microbiological quality of the fruit nectars distributed by the government is in adequate sanitary conditions and that the isolated bacteria showed sensitivity to Ceftriaxone and Gentamicin, as well as resistance to antibiotics such as Kanamycin, Tetracycline and Ampicillin.