Calidad microbiológica y resistencia bacteriana de una bebida emoliente a base de sábila (Aloe vera) expendido de forma ambulatoria en la ciudad de Riobamba.

Abstract

The microbiological analysis and bacterial resistance of an emollient drink based on aloe vera (Aloe vera) sold by street vendors in Riobamba city aimed to analyze the quality of these drinks through microbiological counts in different culture media. Besides, it verifies if they are suitable for human consumption. This study was conducted on 30 samples from 15 vending stalls located on the streets of Riobamba, following the specifications of the Health Standard that establishes microbiological quality and safety criteria for food and beverages for human consumption No. 591-2008 MINSA/DIGESA. Mesophilic aerobes, molds and yeasts, total coliforms, and Staphylococcus aureus were analyzed. The results reported that 100% of the samples exceeded the maximum permissible limits for all studied microorganisms. Bacteria were isolated, finding: gram-positive cocci (Staphylococcus aureus, Enterococcus spp.) and gram-negative bacilli (Escherichia coli, Enterobacter cloacae, Enterobacter aerogenes, Klebsiella pneumoniae, Citrobacter diversus). Antimicrobial sensitivity tests showed bacterial strains resistant to ampicillin, amoxicillin + clavulanic acid, gentamicin, penicillin G, and erythromycin. Informative material was designed so that beverage vendors know basic hygiene standards. The hygienic-sanitary quality of these drinks is deficient, which could pose a public health problem as it can cause diseases in consumers. Therefore, attention is called to the relevant authorities to ensure better control in the commercialization of these drinks and guarantee consumer safety.