drought
Despite the sweat and transdermal fluid secretion (insensible perspiration) offers the epidermis a very dry environment, which is a poor breeding ground. Which correspond to significantly higher bacterial densities in moist areas of skin (intertriginous), such as armpits, finger and toe spaces, groin, anal fold.
lipids, fatty acids
Free fatty acids, some of which are first formed by bacterial metabolism (lipophilic nuclei, see below), bactericidal to many bacteria. A change in these environmental conditions also attracts shifts in the seed densities of individual species and species after themselves. For example, the proportion of lipophilic species in the state to take the seborrhoea and overall number of bacteria increases with increased sweating (humidification otherwise dry skin ) to.
Seborrheic zones
Talgreiche skin regions are very densely populated with lipophilic germs, including: corynebacteria, propionibacteria and Malassezia furfur. The lipolytic metabolism of propionibacteria (including by lecithinase) leads to the formation of free fatty acids, which in turn affect the rest of the colonization of the skin. In addition to these lipophilic organisms (mainly propionibacteria) also plenty of coagulase negative staphylococci and non-pathogenic mycobacteria are present. The seborrheic areas include: forehead, nasolabial folds, nose, neck and shoulders.
Wet skin areas
higher humidity leads to an increase in bacterial density. In intertriginous areas (finger and toe spaces, groin, armpit, Pofalte) are the counts significantly larger than, for example, at the very dry lower legs. The armpits are colonized very different, either coagulase-negative staphylococci predominate next few corynebacteria or the opposite is the case. In the sweat ducts to settle Peptostreptokokken, which are often the cause of an Schweißdrüsenabszesses. Spaces between the toes: pigment-forming Bacteroides species (B. melaninogenicus, B. asaccharolyticus) and Clostridium perfringens are regularly detected. Intertriginous areas are populated fairly often (yeast) fungus.
0 comments:
Post a Comment