Table 2. Opportunistic pathogens.

Organism	Source	Presentation(s)
Candida albicans [10]	Oral cavity and genital organs [10]	Endocarditis, oral thrush, urinary tract infection, endophthalmitis [11]
Staphylococcus aureus	Skin [10]	Sepsis [10]
Pseudomonas aeruginosa	Medical devices [10]	Otitis externa, burn infections, pneumonia [10]
Clostridium difficile	Gastrointestinal tract [10]	Diarrhea, colitis [12]
Legionella pneumophila	Water [13]	Pneumonia [10]
Serratia marcescens	Water, soil, plants, and animals [3]	Urinary tract infections, bloodstream infections, and bloodstream infections [13]