Gram-negative rods
Acinetobacter baumannii
Brucella
sp.
Campylobacter
sp
Haemophilus influenzae
Helicobacter pylori
Legionella pneumophila
Klebsiella granulomatis
Citrobacter
sp.
Enterobacter
sp
Escherichia coli
Klebsiella pneumoniae
Proteus
sp
Salmonella typhi
Shigella
sp.
Yersinia pestis
Vibrio cholerae
Acinetobacter
sp.
Pseudomonas aeruginosa
Bacteroides fragilis