transmission of disease-producing agents such as bacteria‚ viruses and fungi from one patient to another patient‚ from dental practitioner and dental staff to patients‚ and from patients to dental practitioner or other dental staff. In dental practice‚ microorganisms may be inhaled‚ implanted‚ ingested‚ injected‚ or splashed onto the skin or mucosa. They can spread by direct contact from one person to another‚ or through indirect contact via instruments and equipment‚ when the dental staff member’s hands or
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of disease within a health care facility. Infectious and Communicable Diseases Diseases can be classified according to whether or not they can be transmitted from one person to another person. An infectious disease results from an invasion of microorganisms‚ such as bacteria or viruses. A communicable disease is a type of infectious disease that can be transmitted from one person to another person. Not all infectious diseases are communicable. For example‚ Lyme disease is caused by bacteria‚ but
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Unit 4222-265 Causes and spread of infection (ICO2) 1.1 Identify the differences between bacteria‚ viruses‚ fungi & parasites. • Bacteria is a microorganism‚ most bacteria is harmless. It is found in soil‚ water‚ plants‚ animals and humans; it can only be seen under a microscope. Antibiotics can help treat bacterial infections. Examples of bacterial infections are TB and MRSA. • Viruses live inside other living organisms. They can enter humans through the nose‚ mouth and breaks in the skin. Viruses
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ring worm‚ yeast infection. Parasites – worms‚ malaria‚ trypanosomiasis (sleeping sickness) 1.3 Describe what is meant by infection and colonisation. Infection – is an invasion to body tissues from a disease- caused microorganism. Colonisation – is multiplication of microorganisms without tissue invasion or damage. 1.4 Explain what is meant by “systemic infection and localized infection” Systemic – is when infection is distributed throughout the whole body. Localized – is when infection is limited
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persistent with the germ multiplying on your body (usually called colonisation). In certain circumstances‚ the germs that colonise our bodies may go on to give an infection. 1.4 Systemic infection is a generic term for an infection caused by microorganisms in animals or plants‚ where the causal agent (the microbe) has spread actively or passively in the host’s anatomy and is disseminated throughout several organs in different symptoms of the host. Systemic infections are also called disseminated
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November 17th 2011 at 11:30 a.m. (eastern). I sense this lab will provide evidence that the sample from tap water does not contain e-coli but will provide evidence that the sample from the lake water will contain e-coli. BACKGROUND Microorganisms are an essential factor in many natural phenomena that make life possible on Earth and the diversity of microbial populations that they take advantage of any niches found in their environment. Such niches can be different amounts of light‚ oxygen
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individual or a con- specific (belonging to the same species) individual or group‚ regardless of whether the other individual was previously infected. MODES OF INFECTION The main modes of infection are categorized into three; Direct Indirect Airborne 1. DIRECT MODE OF INFECTION DIRECT TRANSMISSION By direct or immediate transfer of the agent to an appropriate portal of entry by personal contact‚ e.g. touching‚ biting‚ kissing‚ sexual intercourse By the direct projection of droplets
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Population growth in yeast Aim: To study the population growth rate of yeast‚ a microorganism Saccharomyces cerevesiae Variables: | | Units | Independent variable | Time the readings were taken | Hours | Dependent variable | Absorbance (increasing yeast population) | - | Controlled variables | Units | Possible effects on result | The wave lengths | Nanometer | since the transmission and absorbance is being measured at a specific wave length‚ so if we change it the results
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Biogenesis is any process by which lifeforms produce other lifeforms. For example‚ a spider lays eggs that become other spiders. Spontaneous generation is a different matter‚ the ancient Greeks believed that living things could spontaneously come into being from nonliving matter‚ and that the goddess Gaia could make life arise spontaneously from stones – a process known as Generatio spontanea (which obviously translates to spontaneous generation). Aristotle disagreed‚ but he still believed that creatures
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An agar plate is a Petri dish that contains a combination of agar and nutrients that help microorganisms grow. The proper method of setting microorganisms on an agar plate is know as “streaking”. In order to streak‚ the microorganisms are placed on a sterile swab or metal wire‚ which is then dragged lightly against the agar solution‚ leaving behind the microorganisms. The amount of organisms is greatest at the beginning of the streak and lowest at the end of the streak (Madigan
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