Bacteria Flashcards
Peptococcus
Gram +
Cocci
Anaerobic
Peptostreptococcus
Gram +
Cocci
Anaerobic
Staphylococcus aureus
Gram + Cocci Aerobic Clusters Catalase + Coagulase + More virulent type of staphylococcus
Staphylococcus epidermidis
Gram + Cocci Aerobic Clusters Catalase + Coagulase - Frequent contaminant of blood cultures
Staphylococcus saprophyticus
Gram + Cocci Aerobic Clusters Catalase + Coagulase -
Streptococcus pneumoniae
Gram + Cocci Aerobic Pairs/Chains Catalase - α-hemolysis If streptococci found in respiratory culture Oral flora
Viridans streptococci
Gram + Cocci Aerobic Pairs/Chains Catalase - α-hemolysis Oral flora
Streptococcus pyogenes
Gram + Cocci Aerobic Pairs/Chains Catalase - β-hemolysis Group A Pathogens of skin, pharynx, and genitourinary tract
Streptococcus agalactiae
Gram + Cocci Aerobic Pairs/Chains Catalase - β-hemolysis Group B Pathogens of skin, pharynx, and genitourinary tract
Enterococcus faecalis
Gram + Cocci Aerobic Pairs/Chains Catalase - Non-hemolytic If streptococci found in intra-abdominal culture Bugs of gastrointestinal origin More common
Enterococcus faecium
Gram + Cocci Aerobic Pairs/Chains Catalase - Non-hemolytic If streptococci found in intra-abdominal culture Bugs of gastrointestinal origin More resistant
Lactobacillus
Gram +
Bacilli
Anaerobic
or
Gram +
Bacilli
Aerobic
Group 2
Propionibacterium
Gram +
Bacilli
Anaerobic
Common skin contaminant
Actinomyces
Gram +
Bacilli
Anaerobic
Clostridium
Gram +
Bacilli
Anaerobic
If Gram + bacilli from necrotizing wound infection
Corynebacterium
Gram + Bacilli Aerobic Group 1 Common skin contaminant
Listeria
Gram + Bacilli Aerobic Group 1 If Gram + bacilli from CSF culture
Gardnerella
Gram +
Bacilli
Aerobic
Group 2
Bacillus
Gram + Bacilli Aerobic Group 2 Common skin contaminant
Cocci
Spheres
Most medically important Gram + pathogens
Bacilli
Rods
Bacteroides
Gram -
Bacilli
Anaerobic
Prevotella
Gram -
Bacilli
Anaerobic
Fusobacterium
Gram -
Bacilli
Anaerobic
Vibrio
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter
Aeromonas
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter
Escherichia
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Klebsiella
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Serratia
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Enterobacter
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Citrobacter
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Proteus
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Salmonella
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Shigella
Gram - Bacilli Aerobic Rapid growth on standard agar Glucose fermenter Enterobacteriaceae Enteric / Lactose fermenting gram- rod
Pseudomonas
Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance
Acinetobacter
Gram - Bacilli (may appear as coccobacilli) Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance
Stenotrophomonas
Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance
Burkholderia
Gram - Bacilli Aerobic Rapid growth on standard agar Non-fermenter Nonfermenting gram- rod Has high level of antibiotic resistance
Haemophilus
Gram - Bacilli (may appear as coccobacilli) Aerobic Fastidious organism HACEK organism
Campylobacter
Gram -
Bacilli
Aerobic
Fastidious organism
Helicobacter
Gram -
Bacilli
Aerobic
Fastidious organism
Bartonella
Gram -
Bacilli
Aerobic
Fastidious organism
HACEK organisms
Haemophilus Actinobacillus Cardiobacterium Eikenella Kingella
Gram -
Bacilli
Aerobic
Fastidious organism
Fastidious organisms
Picky eaters
Grow slowly
Require specially supplemented media
May take few days to few weeks to grow in culture
Neisseria
Gram -
Cocci
Useful in preliminary identification of meningitis; strongly suggests Neisseria meningitidis
Moraxella
Gram -
Cocci (may appear as coccobacilli)
Actinobacillus
HACEK organism
Cardiobacterium
HACEK organism
Eikenella
HACEK organism
Kingella
HACEK organism