BACTERIA MORPHOLOGY

• Staining divides bacteria into 2 ways:

  gram positive

  gram negative
• Common Cellular Morphologies:

  - Cocci (circular)

  - Coccobacilli (ovoid)

  - Bacillus (rod-shaped)

  - Fusiform (Pointed ed)

  - Curved

  - Spiral shapes
• - Found in ocean sediment (African coast)

  - Diameter: 0.1 to 0.3 mm

  Thiomargarita namibiensis
• • Arrangements of bacterias:

  in clusters

  in chains

  in pairs

  in tetrads

  coccobacilli

  bacilli of various size

  fusiform bacilli

  palisading

  spirochetes
• It is what we called when bacilli is varying in sizes?

  pleomorphism
• Diplococcus:

  • Plane of Division: One plane
  • Resulting Arrangement: Two cocci adjacent to each other
  • Examples: Neisseria spp., Streptococcus pneumoniae
• type of bacteria that is exempted by diplococcus?

  Neisseria spp. Neisseria weaver Neisseria elongate
• **Cocci in Chains:**Plane of Division:_____Resulting Arrangement: ______Example: _________

  One plane

  Continuous division

  Streptococcus spp.
• • Tetrads:**Plane of Division: ______Resulting Arrangement of the example bacteria: ______-Example: ____________

  two plane

  Coccus in packets of four

  Micrococcus tetragena
• • **Sarcina/e:**Plane of Division: _______Resulting Arrangement of the example bacteria: ______Example: ______

  three plane in a regular pattern

  Coccus in cubical packets of eight

  Microccus luteus
• • **Cocci in Clusters:**Plane of Division:________Resulting Arrangement: ______Example: __________

  two or more plan in irregular pattern

  grape like clusters

  Staphylococcus spp.
• A rod shaped, cylindrical, or elongated bacteria?

  Bacillus
• bacillus in pair

  diplobacillus
• bacillus in chains

  streptobacillus
• bacillus that are small, short, stout/plump

  coccobacillus
• arranged in school of fish, rail road track, or fingerprint pattern in stained smear

  small and short bacillus
• What bacteria is an example of small and short bacillus?

  Haemophilus ducreyi
• causative agent of soft changre/ chancroid?

  Haemophilus ducreyi
• Give me an example of a LARGE, SQUARE CUT-ENDS, SPORE FORMING BACILLUS which is Arranged in chains?

  Bacillus anthracis
• Give me a bacteria that is LARGE, ROUNDED ENDS, NON-SPORE FORMING BACILLUS?

  Fusobacterium spp.
• anaerobic bacteria that is found in GTI?

  Fusobacterium spp.
• Sometimes arranged in serpentine cord (crawling snake) pattern in stained smears

  SLIM, SLENDER, THREADLIKE BACILLUS
• give me an example of bacteria that looks like a crawling snake?

  Mycobacterium tuberculosis
• give me an example of bacteria that is BRANCHING OR FILAMENTOUS BACILLI (3)

  Actinomyces spp.

  Nocardia spp.

  Actinomycetes spp
• Club shaped or barb shaped arranged in palisade, fence stick, cigarette packet.

  irregular bacilli
• Sometimes resembles X, V, Y, Z, or Chinese character

  irregular bacilli
• give me an example of a club shape or irregular type of bacilli

  Corynebacterium diphtheriae
• give me an example of CURVED OR COMMA SHAPED BACILLI

  Vibrio spp.
• helical or twisted bacteria

  spirals
• A bacteria that is helical but rigid

  Spirillum spp.
• bacteria which are helical as well but more flexible in movement

  Spirochetes
• Give me an example of bacteria that is SPIRAL WITH TWO OR MORE CURVES and is Quite rigid

  Spirillum minor/minus
• causative agent of sodoku (a rat bite infection)

  Spirillum minor/minus
• Resembling a stretch spiral

  LOOSELY TWISTED SPIRAL
• causative agent of relapsing fever and lyme disease

  Borrelia spp.
• give me an example of a LOOSELY TWISTED SPIRAL bacteria

  Borrelia spp.
• resembling a cork screw

  TIGHTLY TWISTED SPIRAL
• causative agent of syphilis

  Treponema pallidum
• give me an example of a cork screw bacteria

  Treponema pallidum
• An example of bacteria that is Sometimes even resembling an interrogative symbol

  Leptospira interrogans