O’Donnell All Bacteria

Chlamydia trachomatis

Pleiomorphic Gm-

STI

Often asymptomatic

Causes PID

Neisseria gonorrheae

Gm- diplococci

STI

Localized infection

Causes PID/epididmitis

Neisseria meningitidis

Gm- diplococci

Capsule, very invasive

Causes meningitis

Haemophilus influenzae

Gm- coccobacilli

Can cause respiratory/sinus infections, otitis media, conjunctivitis

Can have capsule

Bordetella pertussis

Gm- coccobacilli

A-B exotoxin

Causes whooping cough

Moraxella catarrhalis

Gm- diplococci

β-lactamase producer

Causes localized respiratory infections

Legionella pneumophila

Gm- bacilli

Found in fresh water/plumbing

Causes necrotizing multifocal pneumonia

Escherichia coli

Gm- bacilli

Lactose positive

Commonly causes food poisoning and UTIs

Klebsiella pneumoniae

Gm- bacilli

Lactose positive

Healthcare-associated infections

High antibiotic resistance

Proteus mirabilis

Gm- bacilli

Lactose negative

Hospital acquired UTIs

Issue for catheters

Sulfur/rotten egg smell

Campylobacter jejuni

Gm- curved/spiral bacilli

Causes diarrhea and dysentery

Can lead to Guillain-Barré Syndrome

Helicobacter pylori

Gm- curved/spiral bacilli

Causes gastric ulcers

Microaerophile

Produces urease

Yersinia pestis

Gm- bacilli

Causes Bubonic Plague

Spread by rodents/fleas

Pseudomonas aeruginosa

Gm- bacilli

SPACE

Dark blue pigment

Often seen with another illness/injury

Biofilms in cystic fibrosis

Acinetobacter baumannii

Pleiomorphic Gm-

Pan-drug resistance or multi drug resistance

Bacteroides fragilis

Gm- bacilli

May prevent colitis or IBD

Causes abdominal abscesses with trauma

Streptococcus pyogenes (Group A Strep)

Gm+ cocci in chains

Beta-hemolytic

Causes strep throat

Streptococcus pneumoniae

Gm+ diplococci

Alpha-hemolytic

Ungroupable

Cause pneumonia

Capsule

Streptococcus agalactiae (Group B Strep)

Gm+ cocci in chains

Beta-hemolytic

Causes invasive infections in newborns and elderly

Enterococcus faecalis/faecium

Gm+ cocci in chains

Gamma-hemolytic

Causes UTIs and soft tissue infections

Often vancomycin resistant

Staphylococcus aureus

Gm+ grape-like clusters of cocci

MSSA, MRSA, VRSA

Skin lesions, osteomyelitis, scalded skin syndrome

Clostridium perfringens

Gm+ bacilli

Spore forming

Gas gangrene

Clostridium tetani

Gm+ bacilli

Spore forming

Tetanus toxin, lockjaw

Clostridium botulinum

Gm+ bacilli

Spore forming

Botulism toxin, flaccid paralysis

Clostridium difficile

Gm+ bacilli

Spore forming

Antibiotic associated diarrhea

Associated with hospital stays