Blood samples were gathered in EDTA tubes (Venoject K2K, Terumo Europe NV, Leuven, Belgium) from patients who had systemic infections caused by E. fecalis (male, 70 years old, septicemia), S. aureus (male, 26 years old, severe periodontitis, ulcers and septicemia), Pseudomonas aeruginosa (p. aeruginosa) (female, 35 years old, decubital ulcer), Staphylococcus epidermidis (S. epidermidis) (female, 76 years old, prosthesis infection), Clostridium perfringens (female, 75 years old, decubital abscess), Bacterioides fragilis (male, 61 years old, perianal abscess and septicemia), Prevotella oralis (male, 60 years old, severe periodontitis and bacteremia), Escherichia Coli (E. coli) (female, 38 years old, pyelonephritis) and Streptococcus sp. (78 years old male, septicemia) at convalescence.