Organisms which do not gram stain well
- These Rouges May Microscopically Lack Color.
- Treponema,Rickettsia,Mycobacteria,Mycoplasma,Legionella pneumophila,Chlamydia.
- Oh My no cellwall.
Intracellular Organisms
Obligate Intracellular
- Mycoplasma,Rickettsiae.
- RiCh organisms stay inside
Facultative Intracellular
Sally Myc and Bruce Neednot Live FreeLY.
Salmonella,Mycobacterium,Brucella,Neisseria,Listeria,Franciscella,Legionella,Yersinia.
Obligate anaerobes
- ABC are anaerobes.
- Actinomycetes,Bacteroids,Clostridium.
- Anaerobes lack Catalase,Superoxide dismutase so susceptible to oxidative damage.
- Aminoglycosides are ineffective because these antibiotis require O2 to enter into the cell.
Encapsulated bacteria
- Some Killers Have Pretty Nice Capsules.
- Streptococcus Pneumoniae
- Klebsiella penumoniae
- H.Influenza B
- Pseudomonas aeroginosa
- N.Meningitidis
- Cryptococcus
- Positive Quellung reaction.
Urease Positive
- Ptoteus
- Ureaplasma
- H.pylori
- Klebsiella
Gram positive and Gram negative
All cocci are gram positive except Neisseria
All bacilli are gram negative except DATTA
- Diptheria
- Actinomycetes
- Tetani
- Tuberculosis
- Anthrax bacillus
Motility of Organisms
- Dartling motility/Swarm of Gnats-Cholera
- Stately motility-Clostridia
- Swarming motility-Proteus
- Spinning motility-Fusobacterium gyrans
- Tumbling motility-Listeria
Bacterial Growth factors
- Salmonella Typhi-Tryptophan
- Gonococci-Glutathione
- H.influenzae-Factors V and X
Generation time
- Coliforms-20 minutes
- Tubercle bacilli-14 hours
- Lepra bacillus-12 to 13 days.
To remember:Time to cook a cauliflower 20 minutes,for tubercle bacilli it becomes hours as sputum samples are taken hours apart.Leprosy requires constant contact to develop so it becomes several days.
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