background material explaining any terms or processes with which you are not familiar. Record the results of your investigations of each unknown in Table 1 by completing the following steps: 1) Apply the stain to your first unknown slide and examine it under the microscope. 2) Record the shape of the bacteria‚ the arrangement of the bacteria‚ and the gram staining characteristics. 3) Analyze and record the G+C content of the sample by dragging the DNA tube that corresponds
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Introduction Clinically defined‚ Endocarditis is an infection of the inner lining of the heart. Endocarditis occurs when bacteria enters the body and spreads through the blood stream. Once in the blood‚ the bacteria will latch on to any damaged or weakened parts of the heart‚ and in most cases the heart valves are targeted. Endocarditis is extremely rare for individuals with healthy hearts and immune systems‚ but those with weakened immune systems‚ preexisting heart conditions‚ or individuals that
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Antimicrobial Property of Mango Twigs Extract against Dental Caries-causing Microorganisms (Streptococcus mutans‚ Streptococcus sobrinus) Jervene Venturina‚ Santiago Bataller Jr.‚ Raymark Camato Dental caries is an ecological disease in which the diet‚ the host and the microbial flora interact over a period of time in such a way as to encourage demineralisation of the tooth enamel which results to caries formation. This disease can affect both the enamel (the outer coating of the tooth) and
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hormonal status‚ and a number of external factors-for example‚ diet‚ the microbial flora colonizing the teeth‚ oral hygiene‚ and fluoride availability. In this article‚ our aim is to focus on the effects of saliva and salivary constituents on cariogenic bacteria and the subsequent development of dental caries. H uman saliva not only lubricates the oral tissues‚ making oral functions such as speaking‚ eating‚ and swallowing possible‚ but also protects teeth and oral _ mucosal surfaces in different ways
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effect of different toothpastes containing different ingredients on growth of the oral bacterium Streptococcus mutans. This is important as Streptococcus mutans is what causes the common carries infection‚ or a cavity. Hypothesis If the ring of inhibition is greatest with the Aloe vera‚ then the plant A. vera is the best‚ as a smaller zone of inhibition means that there will be a lesser growth of bacteria when that herb is used in the actual experimentation. This comes from a previous study by Julia
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toothpaste to oral bacteria VS the effect of mouthwash to oral bacteria Problem: Bacteria in ones’ mouth causes many problems for oneself in the future. For example‚ gum diseases‚ bad breath‚ etc..‚ Toothpaste and mouthwash is promised to kill most of the bacteria in one’s mouth‚ but which is more effective at killing the bacteria and preventing future problems? This experiment and research is going to prove which is more effective at killing oral bacteria. Purpose:
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odontogenic infections Most odontogenic infections contain mixed aerobic and anaerobic bacteria. predominant bacterial species present in oral cavity are maunly Streptococcus ‚ Peptostreptococcus‚ Veillonella‚ Lactobacillus‚ and Actinomyces . 11‚12 The mixed aerobic-anaerobic composition of the bacteria involved in suppurative odontogenic infections is thought to be important in the pathogenesis of infection. if bacteria involved in mixed odontogenic infections are isolated in pure culture and transferred
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Effect of chalepensin on S. mutans growth Fifty microliters of a S. mutans suspension (1 x 103 bacteria/ml) in BHI medium (Remel‚ Lenexa‚ KS) were transferred to flat-bottomed 96-well plates (Corning Incorporated‚ Corning‚ NY) containing serial dilutions (1:2) of 50 μl of chalepensin‚ or 1 μg/ml tetracycline‚ chalepensin-free vehicle (vehicle was similarly processed as with chalepensin extraction‚ but without plant material)‚ and culture medium controls‚ and incubated for 6 h at 37°C. Next‚ MTT was
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Dental Caries 1.1 – Describe a problem biologists are trying to solve Dental caries (tooth decay) is the destruction of the outer surface of a tooth. Decay results from the action of numerous bacteria‚ including Streptococcus mutans‚ which inhabit plaque‚ formed by colonies of bacteria. The plaque sticks to tooth enamel and metabolizes carbohydrates from food to produce lactic acid. The lactic acid‚ if left in contact with the teeth for a sustained period of time‚ causes the demineralization of
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human tooth ‚ tooth decay [pic] Human tooth Teeth of humans are small‚ calcified‚ whitish structures found in the mouth that are used to break down food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums. Teeth are made of multiple tissues of varying density and hardness. Teeth are among the most distinctive (and long-lasting) features of mammal species. Humans‚ like other mammals‚ are diphyodont‚ meaning that
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