Bacteria- Shapes

filament bacillus

- bacillus bacteria that grow in a chain of cells; sometimes hard to see as individual cells - can grow long end to long end or side width by side width

solitary bacillus

- bacillus bacteria where some cells have no tendency to associate with one another

L-form

- discovered at the Lister Institute - type of involution (shape) form that has whatever shape it is when you are looking at it - one shape does not have a regular occurrence - aka, pleiomorphic - ex. amoeba - occurs when nutrients are all used up so the cell wall loses shape

bacteria

- prokaryotic - have 3 main shapes, but come in different sizes too - have a large cell surface area

bacillus bacteria

- rod shaped bacteria - cells of species have characteristic lengths & widths

coccus bacteria

- spherical shaped bacteria - best grown in broth medium (to separate) - has cellular cement at the point of contact between cells

filament spirillum

- spirillum bacteria cells that create a spiral filament - can see individual cells by their cell walls

3 main shapes of bacteria

1. coccus 2. bacillus 3. spirillum

types of coccus bacteria

1. diplococcus 2. tetrads 3. sarcina 4. streptococcus 5. staphylococcus 6. single, solitary

coccoid bacilli

bacillus bacteria that are really short rod shaped cells; hard to distinguish from coccus cells

palisade arrangement

bacillus bacteria that arrange side by side

spirillum

bacteria that have a small, curving or spiraled shape

diplococcus

coccus bacteria where 2 cells stick together

sarcina

coccus bacteria where a group of 8 cells are arranged in a 3D shape

tetrads

coccus bacteria where groups of 4 are formed when bacteria grow

staphylococcus

coccus bacteria where the cells divide & arrange like a bunch of grapes

streptococcus

coccus bacteria where the cells divide & arrange like a string of beads

single, solitary coccus

coccus bacteria where the cells divide & have no tendency to stick together

vibrios spirillum

comma-shaped spirillum bacteria

involution forms

forms that can occur when a bacteria culture is kept for a long time

swollen ends

on bacillus bacteria, some ends may be swollen

mycoplasmas

organisms similar to L-form bacteria because they don't have the cells walls so they don't have a regular shape

solitary spirillum

spirillum bacteria cells that have no tendency to stick together

tightly kinked spirillum

spirillum bacteria that are shaped like a slinky; tightly coiled