Bacteria/drug effects; Penicillin V/pharmacology; Tetracycline/pharmacology; Aspergillus/drug effects; Bacillus subtilis/drug effects; Bordetella/drug effects; Candida/drug effects; Clostridium/drug effects; Corynebacterium/drug effects; Cryptococcus/drug effects; Drug Synergism; Escherichia coli/drug effects; Eukaryota/drug effects; Klebsiella/drug effects; Mycobacterium/drug effects; Neisseria/drug effects; Penicillin Resistance; Penicillium/drug effects; Proteus/drug effects; Pseudomonas/drug effects; Salmonella/drug effects; Sarcina/drug effects; Shigella/drug effects; Staphylococcus/drug effects; Streptococcus/drug effects; Streptococcus pneumoniae/drug effects; Trichophyton/drug effects