Organisms causing nosocomial infections Gram-positive:
Gram-negative:
Staphylococcus aureus Streptococcus pyogenes Staphylococcus epidermidis Streptococcus pneumoniae Clostridium difficile Clostridium perfringens Clostridium tetani
Klebsiella Serratia Enterobacter Proteus Pseudomonas Legionella Escherichia coli Citrobacter
Viruses: Hepatitis B Hepatitis C Hepatitis D HIV Herpes viruses Cytomegalovirus Influenza virus Enteroviruses SARS Co V
Fungi: Aspergillus Candida albicans Parasites: Toxoplasma gondii Entamoeba histolytica Pneumocystis jiroveci (earlier known as P. carinii)