Influence of Handling Procedure on the Microbiological Quality of Propolis

Ferreira, Mariza Alves; Machado, Cerilene Santiago; Santos, Polyana Carneiro dos; Sodré, Geni da Silva; Carvalho, Carlos Alfredo Lopes de; Evangelista-Barreto, Norma Suely; Dias, Luís G.; Estevinho, Letí­cia M.

doi:10.37885/210303991

Cited by 1 publication

(1 citation statement)

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“…Similarly as in our study, the research on Portuguese propolis did not confirm the presence of Salmonella, Shigella, sulphite-reducing clostridia and E. coli (Dias et al, 2012). Meanwhile, due to its antimicrobial properties and low water activity, raw propolis is not a good environment for the development of microorganisms, and proper propolis collecting and handling seems to be a key factor in good microbiological quality of this bee product (Ferreira et al, 2021). The results obtained for phenolic compound content and antioxidant capacity of tested propolis samples are typical for propolis from Central and Eastern Europe.…”

Section: Discussioncontrasting

confidence: 50%

Quality of Propolis Commercially Available on Podkarpacki Beekeeping Market

Miłek,

Ciszkowicz,

Zaguła

et al. 2024

Journal of Apicultural Science

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Eight samples of propolis commercially available on south-eastern Poland’s beekeeping market were compared in terms of quality, chemical composition and biological activity, including antioxidant and antimicrobial properties. The organoleptic characteristics and physicochemical requirements indicated that only 50% of tested propolis samples was classified to class II regarding obligatory limits, while the others were out-class. A big variation in mineral composition was determined by the ICP-OES method but all samples were free of heavy metals (Pb, Cd and Ni). Although mesophilic bacteria, yeasts and moulds occurred in tested propolis (in general lower than 102 CFU/g), E. coli and spore-forming sulphite-reducing bacteria as well as Salmonella and Shigella bacteria were not detected. High antioxidant activity and total phenolic content for all samples was confirmed, which was correlated with antibacterial activity tested against E. coli ATCC 11775 strain. Additionally, the propolis sample with the strongest antibacterial activity (MIC 0.33 mg/mL) inhibited biofilm formation of S. aureus and S. epidermidis ATCC 35984 (MBIC 0.66 and 5.25 mg/mL, respectively). However, great variation in terms of antioxidant activity and HPLC polyphenolic profile were observed, and sakuranetin and pinobanksin were identified as the most effective antioxidant components. Moreover, the usefulness of ATR-FTIR spectra analysis was confirmed as a quick method for initial testing of propolis quality.

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Section: Discussioncontrasting

confidence: 50%