Bacteria GN.pdf

Bacteria Biomedical science Benjamin Tighe Intended Learning Outcomes By the end of this sessions students should be able to: Classify bacteria by: Shape, size and arrangement Structure Gram staining Environmental requirements Their name OAer relevant examples of bacteria associated...

Bacteria Biomedical science Benjamin Tighe Intended Learning Outcomes By the end of this sessions students should be able to: Classify bacteria by: Shape, size and arrangement Structure Gram staining Environmental requirements Their name OAer relevant examples of bacteria associated with denDstry  procreate-reproduce > Features of Bacteria waste. Bacteria are small, single celled micro- organisms Ancient life form Same basic functions as other living cells Lack chlorophyll -plant cells. Usually have single circular DNA ir egularlyed - chromosome found within cytoplasm No membrane-bound organelles  39 trillion microbes on us. Size of Bacteria Shape of Bacteria. -Periotcaries most commons · Arrangement of Bacteria Arrangement supports name > -. 12 1- - 4 Structure of bacteria Complete bacteria work book to describe each of these features Flagellum Ribosomes Cytoplasm Nucleoid Plasma membrane Cell wall Capsule Pilus  vital to differentiate Gram staining have thidd cell wal) Gram staining is a technique used to (which distinguish & classify bacterial species into two groups: 1. Gram-positive bacteria 2. Gram-negative bacteria The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique Gram staining Recall features you identified in the structure of bacteria workbook Cell wall – peptidoglycan – thick (gram positive) Cell wall thin peptidoglycan but thick lipopolysaccharide (gram negative) h?ps://www.youtube.com/watch?v=1SITCrgF3yk decolourising - a purple. dy - Pink.  Endotoxin-Generally associated with gram negative. Which one is which? By far the worst. Can be associated with periodontal disease. t - Environmental Requirements (complete bacteria workbook to describe each of these features) Carbon Moisture Oxygen Dioxide Temperature pH Light OsmoTc Mechanical eUect stress  Label these types of bacteria in relaTon to oxygen environment A lot adapt and lines of Oxygen- can - facultative within range of different oxygen levels. - not a lot of- Oxygen live both high ↑ A A. -and low oxygen anaerobic Bacteria aerobic needs microderophiles environments bacteria oxygen  n to spell !!! Naming Bacteria ClassiWcaTon of organisms The systematic classification of organisms into ordered groups is Kingdom Procaryote called TAXONOMY Division Firmicutes The name is classically a combination of the last two ranks Subdivision Low DNA content Genus and Species Species does not begin with a Family Streptococcaceae capital letter Genus Streptococcus Name is usually in italics Generic names can be abbreviated Species Streptococcus salivarius e.g. S. salivarius -  Bacteria associated with denTstry caused by ↑ biofilm. caries ANUG infective myocarditis legionella. & ↑ ↑ - MRSA missu infection  requi ~&peBotrioidmoentCaraial a disease Features of Bacteria Features of bacteria Relevance Shape & in dentistry arrangement Name Structure Oxygen Gram factor staining