“…The pathogens include besides Staphylococcus aureus various streptococci species such as Streptococcus milleri and α‐hemolytic streptococci (Figure 1). Gram‐negative bacteria (such as Pseudomonas aeruginosa, Escherichia coli, Enterobacter cloacae, Proteus vulgaris, Klebsielleae, Hemophilus) and anaerobic species (Bacteroides, Fusobacterium, Eikenella corrodens ) are more characteristic for specific drugs or forms of application [1, 2]. For example, the occasionally practiced licking or blowing out the injection needle before injection doubles the risk of infection with resident bacteria of the oral flora (e. g. streptococci and anaerobes).…”