épuration (1) surveillance (1) Monitoring (1) Implements (1) Diseases (1) Tools (1) Rickettsia (1) Pathogenic microorganisms (1) Human beings (1) Epidemics (1) Diseases (1) Communicable diseases (1) Cell culture (1) Bacteria (1) Use (1) Pathogens (1) Purification (1) Interpretation (1) roman (1)