Detection of microorganisms (Bacteria, Fungi and Yeasts)‎ in royal jelly

الملخص EN

The aim of the present study to detect the population and frequency (%) of microorganism (bacteria, fungi and yeasts) in royal jelly samples.

The data indicated that, there are no significant differences were remarked in the population of microorganisms between all the samples for bacteria, fungi and yeasts, where the mean number of population was 5.923, 1.38 and 7.85 colonies/sample for bacteria, fungi and yeasts respectively, in produced royal jelly from honeybee colonies, local royal jelly collected from Egyptian market and samples of imported royal jelly collected from Egyptian market, respectively.

According to the isolation and identification procedures for detected royal jelly samples, four bacteria types (Clostridium botulinum, Bacillus cereus, Bacillus wakoensis and Micrococcus luteus), two fungi types (Aspergillusniger and Penicillium sp.) and one yeast type (Saccharomyces cerevisiae) were determined.

The data also summarized that Clostridium botulinum was the most frequency compared with the other bacterial types, where the percentage of frequency was 1.8 – 2.5, 0.9 – 1.4, 0.4 – 0.6 and 1.5 – 2.0% for C.

botulinum, B.

cereus, B.

wakoensis and Micrococcus luteus, respectively.

Meanwhile, Penicillium sp.

the most frequency compared with A.

niger, where the percentage of frequency was 0.5 - 2.9 and 0.7 – 1.0 %, respectively, in produced royal jelly from honeybee colonies, local royal jelly samples collected from Egyptian market and imported royal jelly samples collected from Egyptian market respectively.

Regarding the yeasts, the data also summarized that, S.

cerevisiae was the most frequency in royal jelly that produced from