Gram-negative bacilli, single or clustered flagella, active, non-spore-forming, non-capsulated

Obligately aerobic, low nutritional requirements, growth at 4°C or 42°C, beta hemolytic ring, water-soluble pigments

No growth at 4°C, growth at 42°C is a characteristic of Pseudomonas aeruginosa

Virulence factors: pyocyanin, adhesins, endotoxins, exotoxins, polysaccharide capsule-like substances, invasive enzymes

Can cause wounds and wound infections, respiratory tract infections, urinary tract infections, sepsis

Gram-negative, straight or slightly campylobacter, terminal flagella, motile, non-sporulating, non-capsulated

Obligately aerobic, growth temperature 35℃, short growth at 4℃, blood agar, ordinary culture medium, colonies of medium size, round, smooth, moist, producing yellow pigment that is not hemolytic, cat eye phenomenon appears after 48 hours

Biochemical identification

Opportunistic pathogens

Among infections caused by non-fermenting bacteria, Stenotrophomonas maltophilia is second only to Pseudomonas aeruginosa and Acinetobacter baumannii

Gram-negative, club-shaped, often arranged in pairs, aflagellate, non-motile, non-spored

Obligate aerobic bacteria, growth temperature 35℃, normal medium, MAC, blood plate growth

Biochemical identification

Opportunistic pathogens

Acinetobacter baumannii infections have been on the rise in recent years, second only to Pseudomonas

Acinetobacter baumannii is inherently resistant to ampicillin, first- and second-generation cephalosporins, and first-generation quinolones.

Gram-negative bacilli, periflagellate, motile

Obligate aerobic bacteria, optimal growth temperature 25-35°C, grown on ordinary culture media, cultured in broth for 24 hours, uniform turbidity, bacterial film forming on the surface, precipitation forming at the bottom of the tube, increasing pH

pH to 8.6 is the characteristic of this bacteria

Biochemical identification

Opportunistic pathogens

One of the common bacteria in hospital infections

Gram-negative bacilli, non-flagellated, non-motile, non-capsulated, non-spore-forming, slender cells

Colony: Smooth, shiny, neat edges, light yellow, some also yellow or brown

Biochemical identification

Opportunistic pathogens

One of the common bacteria in hospital infections