Plate 11 Bacterial Shapes. Bacillus Bacillus = rod 0.5-20 µm in length.
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Transcript of Plate 11 Bacterial Shapes. Bacillus Bacillus = rod 0.5-20 µm in length.
Plate 11
Bacterial Shapes
Bacillus
• Bacillus = rod • 0.5-20 µm in
length
Rectangle-Shaped Bacilli
• Bacillus anthracis (anthrax) bacteria is rectangular in shape
Club-shaped Bacilli
• Cornybacterim diphtheria (diptheria) bacteria is club-shaped
Swollen-Shaped Bacilli
• Clostridium tetani (tetnus) bacteria is club shape w/ spore at end
Strepto Bacilli
• Strepto means that the bacteria are linked end-to-end in a chain
• Rat bite fever is an example
Spores in bacilli
Photomicrograph Drawing
Cocci Bacteria
• Cocci = sphere
• Small in diameter (usually 0.5µm)
Forms of Coccus Bacteria
• Diplo – 2 cells fused on one side
• Strepto – long chain• Packet (sarcina) –
group of 4• Staphylo – irregular
group “grape like”
Diplococcus
• Diplo means “double”
• Neisseria gonorrhoeae (gonorrhea) is an example
Streptococcus
• Strepto = long chain
• “Strep Throat” is an example
Sarcina Coccus
• Sarcina = packet
• Micrococcus luteus is an example
• Found on human skin
Staphylococcus
• Staphylo = irregular shape
• Staphylococcus aureus is an example
• “Staph” infection
Spiral Bacteria
•Wave-like shape
•Average 15 µm long
Single Spiral Bacteria
• Vibrio – “comma like”
• Vibrio cholerae (cholera) is an example
Corkscrew and Flagellum Bacteria
• Spirillum = wave like w/ flagella
• Rat bite fever is an example
Corkscrew and No Flagellum
• Spirochete – flexible wall no flagella
• Treponema pallidum (syphilis) is an example
Leptospirilum
What is the practical value of knowing the bacteria’s form?