![]() ![]() The tropical disease cholera, characterised by severe diarrhoea and dehydration, is caused by the vibrio bacteria. Spirochaetes bacteria are responsible for a range of diseases, including the sexually transmissible infection syphilis. ![]() Spirochaetes – as the name suggests, these bacteria are shaped like tiny spirals.Examples include Staphylococci (which cause a host of infections including boils) and Gonococci (which cause the sexually transmissible infection gonorrhoea). ![]() Depending on the sort, cocci bacteria group themselves in a range of ways, such as in pairs, long lines or tight clusters. Cocci – shaped like a sphere with a diameter of around 0.001mm.Illnesses such as typhoid and cystitis are caused by bacilli strains. Bacilli – shaped like a rod with a length of around 0.03mm.Exposure to infected bodily fluids through activities such as sexual intercourse or sharing hypodermic needles.įorgetting to wash your hands after handling pets and animals is another way for germs to be taken in by mouth.īacteria that cause disease are broadly classified according to their shape.Viruses are spread from one person to another by: Indirectly, by touching contaminated surfaces – such as taps, toilet handles, toys and nappies.Breathing in the exhaled droplets when an infected person coughs or sneezes.Contact with the faeces of an infected person.The range of access routes for bacteria includes: To cause disease, pathogenic bacteria must gain access into the body. That’s why some of the most serious communicable diseases known to medical science are viral in origin. Immunisation is available to prevent many important bacterial diseases.Ī virus is an even smaller micro-organism that can only reproduce inside a host’s living cell. Many bacterial infections can be treated successfully with appropriate antibiotics, although antibiotic-resistant strains are beginning to emerge. These disease-causing varieties are called pathogenic bacteria. They are among the most successful life forms on the planet, and range in habitat from ice slopes to deserts.īacteria can be beneficial – for instance, gut bacteria help us to digest food – but some are responsible for a range of infections. Bacteria are tiny single-celled organisms, thought by some researchers to be related to plants. Laurel Susan Studio LLC retains the rights to this work, and it is not to be mass produced or distributed.Many human infections are caused by either bacteria or viruses. This was created by Laurel Susan Studio LLC for your personal use only. These would also make a great bulletin board display. A collection of six foldables (with instructions) are ready to be cut out and glued into a science notebook or on paper. The fourth part of this activity offers students an opportunity to research each of the three types of bacteria to discover how the bacteria can be harmful and helpful to humans. Part three is a page of three printable bookmarks (one for each bacteria shape) for students to color. A color key is included so students may self-check. It is a drawing of the three bacterial types, and students are asked to color each type a different color. Part two is an activity sheet for students to practice identifying the three types of bacteria. The first part of this activity is a one-page poster with information about each of the three bacterial shapes: names with singular and plural forms, their shapes, and etymology of two of the forms. ![]() In this four-part activity, students will be introduced to the three most common bacterial shapes (coccus, bacillus, and spiral) and have the opportunity to research how the bacterial types are harmful and helpful. ![]()
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