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==Key Stage 4==
===Meaning===
[[File:Bacteria.png|right|300px|thumb|A [[Magnify|magnified]] image of several '''bacteria'''.]]
A '''pathogenic bacteria''' are [[bacteria]] which cause [[disease]].
===About Pathogenic Bacteria===
: Some '''pathogenic bacteria''' have a tail called a [[flagellum]].
: Some '''pathogenic bacteria''' are encased in a [[Slime Capsule|slime capsule]] which protects them from [[phagocyte]]s and some [[toxic]] [[chemical]]s.
: [[Bacteria]] are [[Prokaryotic Cell|prokaryotes]] so they do not have a [[Cell Nucleus|nucleus]], [[mitochondria]] or [[chloroplast]]s.
{| class="wikitable"
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|[[File:BacteriaDiagram2.png|center|400px]]
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| style="height:20px; width:200px; text-align:center;" |A [[diagram]] showing the features of a '''bacterium'''.
|}
===Examples===
: [[Cholera]] is a '''pathogenic bacteria''' spread in the water supply.
: [[E.coli]] is a '''pathogenic bacteria''' found in meat.
: [[Salmonella]] is a '''pathogenic bacteria''' found particularly in raw [[chicken]] meat but can be spread to other foods through contact.
: [[Gonorrhea]] is a [[Sexually Transmitted Infection|sexually transmitted]] '''pathogenic bacteria''' which is spread in the body fluids of [[organism]]s.