- Aerobic Gram Negative Rod
- Family - Pseudomonadaceae
- Family - Legionellaceae
- Genus - Brucella
- Other Gram Negative aerobic rods
- Flavobacterium meningosepticum
- Alcaligenes faecalis
- Acetobacteraceae: Acetobacter
- Alcaligenaceae: Achromobacter xylosoxidans
-
Bartonella species
- B. bacilliformis (acute in Oroya Fever, chronic in Peruvian Wart)
- B. quintana (Trench Fever)
- B. henselae (Cat Scratch Disease)