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Download Bacterial Shapes and Groupings
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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 Shapes of Bacteria Most bacteria are one of three shapes (although there are a few other possibilities): Spherical Rod Shaped Spiral Coccus coccus (sing.) cocci (pl.) are spherical (coccus = a berry) Streptococcus & Staphylococcus Chains Grape-like Clusters Scanning Electron Micrograph of Streptococcus pneumoniae Image provided by Dr. Richard Facklam . Courtesy of the Centers for Disease Control and Prevention. bacillus (sing.) bacilli (pl.) ◦are rodshaped (bacill(um) = a little stick) Appear in chains after division spirillum (sing.) spirilla (pl.) are spiral (spiro = spiral, coil) Caption:-- Vibrio cholerae - curved (vibrioshaped), rod prokaryote; causes Asiatic cholera. Caption:-- Neisseria gonorrhoeae - Gram-negative, coccus prokaryote (dividing); causes gonorrhea. 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. 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. Image provided by Joyce Ayers. Courtesy of the Centers for Disease Control and Prevention Staphylococcus albus Streptobacillus nicolau Gaffkya tetragena Diplococcus pneumoniae Spirillum minus Bacterial Diseases Scientific Name Disease and Body Part Affected Diplococcus pneumoniae Pneumonia—lungs Neisseria meningitides Meningitis--brain and spinal cord Corynebacterium diphtheriae Diptheria—nasopharynx or skin Bordetella bronchiseptica Bronchitis—respiratory tract Clostridium tetani Tetanus-nervous system (lock jaw) Myobacterium tuberculosis Tuberculosis--lungs Staphylococcus epidermidis Staph Infection—Skin & Mucous Membranes Bordetella pertussis Pertussis/Whooping Cough--Lungs Bell Work Name at least 5 things that you have to do when we have a lab? WHY?