Regarding the types of isolated contaminants, the presence of Gram-positive organisms is consistent with reports in the scientific literature (Abdelaziz et al., 1989; Ravita et al., 2009). The interesting finding in this study was that coagulase-negative staphylococci and
micrococcus species were recovered only from products that were heavily contaminated and this is probably the first observation reported that draws attention to this phenomenon. It is worth
mentioning that this finding was recorded in products of different brand categories, as shown in Table 2, and that these brands were manufactured by various companies. Therefore, this is a generic observation and not related to a single product or firm. The inability to isolate these Gram-positive organisms from cosmetics with low microbial counts or as solo contaminants may suggest that they were unable to grow or even survive in these products without the help of other microorganisms. Although this assumption requires confirmation and perhaps further investigation, it is consistent with the general consensus that Gram-negative bacteria can thrive in industrial products more than Gram-positive ones.
Regarding the types of isolated contaminants, the presence of Gram-positive organisms is consistent with reports in the scientific literature (Abdelaziz et al., 1989; Ravita et al., 2009). The interesting finding in this study was that coagulase-negative staphylococci and
micrococcus species were recovered only from products that were heavily contaminated and this is probably the first observation reported that draws attention to this phenomenon. It is worth
mentioning that this finding was recorded in products of different brand categories, as shown in Table 2, and that these brands were manufactured by various companies. Therefore, this is a generic observation and not related to a single product or firm. The inability to isolate these Gram-positive organisms from cosmetics with low microbial counts or as solo contaminants may suggest that they were unable to grow or even survive in these products without the help of other microorganisms. Although this assumption requires confirmation and perhaps further investigation, it is consistent with the general consensus that Gram-negative bacteria can thrive in industrial products more than Gram-positive ones.
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