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Bacterial Shapes and Groupings

Bacterial Shapes and Groupings. Bacteria are…. Unicellular May not always appear as single cells able to communicate with one another through a process called quorum sensing. they can function as a multi-cellular population rather than as individual bacteria.

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Bacterial Shapes and Groupings

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  1. Bacterial Shapes and Groupings

  2. Bacteria are… • Unicellular • May not always appear as single cells • able to communicate with one another through a process called quorum sensing. • they can function as a multi-cellular population rather than as individual bacteria. • Often found in clumps, groups or chains • Identified and named by • Their shapes • The way they appear in groups

  3. Shapes of Bacteria • Most bacteria are one of three shapes (although there are a few other possibilities): • Spherical • Rod Shaped • Spiral

  4. Coccus • coccus (sing.) • cocci (pl.) • are spherical • (coccus = a berry)

  5. Streptococcus & Staphylococcus Chains Grape-like Clusters

  6. Scanning Electron Micrograph of Streptococcus pneumoniae Image provided by Dr. Richard Facklam .Courtesy of the Centers for Disease Control and Prevention.

  7. Bacillus • bacillus (sing.) • bacilli (pl.) • are rod-shaped • (bacill(um) = a little stick)

  8. E-Coli & Bacillus Appear in chains after division

  9. Spirillium- 3 Forms • spirillum (sing.) • spirilla (pl.) • are spiral • (spiro = spiral, coil)

  10. VibrioCholerae & Spirullium Caption:-- Vibrio cholerae - curved (vibrio-shaped), rod prokaryote; causes Asiatic cholera.

  11. Spirochete

  12. Groupings/Arrangement of Bacteria

  13. Dipl0= Pair Caption:-- Neisseria gonorrhoeae - Gram-negative, coccus prokaryote (dividing); causes gonorrhea.

  14. Tetra= groups/squares of four

  15. Strepto= chain Caption:-- Streptococcus pyogenes - Gram-positive, coccus prokaryote (dividing). Causes pharyngitis, food poisoning, puerperal fever (childbed fever), scarlet fever, rheumatic fever, skin and wound infections (erysipelas, impetigo) . Group A Streptococcus.

  16. Staphylo= clump Caption:-- Staphylococcus aureus -Gram-positive, MRSA, coccus prokaryote (dividing); causes food poisoning, toxic shock syndrome and skin and wound infections such as scalded skin syndrome, scarlet fever, erysipelas and impetigo.

  17. MRSA-Methicillin Resistant Staphylococcus Aureus Image provided by Joyce Ayers. Courtesy of the Centers for Disease Control and Prevention

  18. Sarcena= cubes of eight

  19. Other Shapes…

  20. Staphylococcus albus

  21. Streptobacillusnicolau

  22. Gaffkyatetragena

  23. Diplococcuspneumoniae

  24. Spirillum minus

  25. Bacterial Diseases

  26. Bell Work • Name at least 5 things that you have to do when we have a lab? WHY?

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