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20 Cards in this Set
- Front
- Back
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Lactose Fermenter
Oxidase negative TSI A/A (LF) No Hs2 production Indole positive |
E. coli
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What does oxidase positive even mean?
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OX+ normally means that the bacterium contains cytochrome c oxidase and can therefore utilize oxygen for energy production with an electron transfer chain.
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LF
Oxidase negative TSI A/A (LF) No H2S Indole negative |
Klebsiella pneumonia
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LF
oxidase negative TSI A(K)/A H2S Produced Indole negative most of the time |
Citrobacter freundii
Citrobacter is a genus of Gram-negative coliform bacteria in the Enterobacteriaceae family. |
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NLF
oxidase negative TSI K/A H2S production No indole formation Swarming colonies |
Proteus mirabilis
Proteus mirabilis is a Gram-negative, facultatively anaerobic bacterium. It shows swarming motility, and urease activity. P. mirabilis causes 90% of all 'Proteus' infections in humans. |
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NLF
oxidase negative TSI A(K)/A (NLF) H2S Production Indole Positive Swarming colonies |
Proteus vulgaris
Proteus vulgaris is a rod-shaped, Gram negative bacterium that inhabits the intestinal tracts of humans and animals. It can be found in soil, water and fecal matter. It is grouped with the enterobacteriaceae and is an opportunistic pathogen of humans. It is known to cause urinary tract infections and wound infections. |
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NLF
Oxidase negative TSI K/A H2S production Few indole positive |
Salmonella enteritis
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NLF
oxidase negative A (K)/A no H2S few indole postiive Some have red/orange pigment |
Serratia marcesens
Serratia marcescens is a species of Gram-negative, rod-shaped bacterium in the family Enterobacteriaceae. A human pathogen, S. marcescens is involved in nosocomial infections, particularly catheter-associated bacteremia, urinary tract infections and wound infections,[1][2] and is responsible for 1.4% of nosocomial bacteremia cases in the United States.[3] It is commonly found in the respiratory and urinary tracts of hospitalized adults and in the gastrointestinal system of children. |
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NLF
oxidase positive (only one among the gram negative rods we studied in lab!) TSI K/K No H2S Indole negative Metallic/green sheen |
Pseudomonas aeruginosa
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NLF
oxidase negative K/K No H2S Production Indole negative |
Stenotrophomonas maltophilia
S. maltophilia frequently colonizes breathing tubes such as endotracheal or tracheostomy tubes, the respiratory tract and indwelling urinary catheters. |
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Gram negative coccobacilli
Small gram negative bacilli |
suggestive of Hemophilus, fastidious and anaerobic organisms. Pseudomonas may occur as larger coccobacilli
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Gram negative bacilli
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Enteric gram negative rods
* Enterobacteriaceae (=enteric gram-negative rods, enteric bacteria, coliform bacteria): a large, heterogeneous group of gram-negative rods * Natural habitat is the intestinal tract of humans and animals * Some enteric organisms (E.coli) are part of the normal flora and incidentally cause disease, while others (salmonellae, shigellae) are regularly pathogenic for human |
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Gram negative anaerobes
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Bacteroides
Fusobacterium |
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Gram negative aerobic cocci
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Neisseria
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Gram negative Aerobic bacilli/coccobacilli
Do grow on MacConkey agar, ferment lactose |
LF: Enterobacter
E Coli Citrobacter Klebsiella |
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Gram negative Aerobic bacilli/coccobacilli
Do grow on MacConkey agar, do NOT ferment lactose, do NOT ferment glucose |
Oxidase positive: pseudomonas, burkholderia
Oxidase negative: Acinetobacter Stenotrophomonas |
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Aerobic bacilli/coccobacilli
Do grow on MacConkey agar, DO NOT ferment lactose, ferment glucose |
Salmonella
Shigella Proteus Providencia Mogranella others |
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Gram negative bacilli/coccobacilli
Do NOT grow on MacConkey agar |
Haemophilus
Campylobacter/Legionella/Bordetella require special growth media |
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Gram negative cocci
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Probable anaerobe
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Gram negative intracellular diplococci
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Probably neisseria or branhamella
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