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Biofilms are generally thousands of times less sensitive to antibiotics than planktonic bacteria.
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Why antibiotics induce biofilm formation?
Antibiotics trigger a protective response by bacteria to form biofilms. Bacteria within a biofilm are thousands of times less susceptible to antibiotics than planktonic bacteria
What two factors make a biofilm in an intravenous line especially dangerous to the patient?
The two factors that make biofilm in an intravenous line especially dangerous to the patient is infection and the difficulty of treatment. While the microorganisms are within the biofilm, they cannot be eradicated with antibiotics. However, if the biofilm were to detach from the IV line, the access to the circulatory system would potentially cause a massive infection.
Are there any antibiotics for dogs with very sensitive stomachs?
Ask your vet about that. There may be
What are the benefits of biofilm made by normal flora?
Longevity.
Where doesnt a biofilm occurs?
Sterile or dry conditions
What is biofilm?
Biofilm forms when bacteria sticks to surfaces in moist environments by excreting a slimy substance. Examples of this would be the slippery rocks on the bottom of a stream or plaque on teeth.
Which microscope would be MOST useful for examining the contours of the surface of a bacteria cell?
It depends on the type of biofilm, what surface the biofilm is on, and what information you want to get by looking at the biofilm under a microscope. If you just want to look at how much of a surface is covered by a biofilm, you can use normal light trasmission microscopy (as long as the surface is transparent e.g. glass). Alternatively you could use epifluorescent microscopy in combination with a fluorescent stain. If you want to look at the structure of the biofilm, confocal laser scanning microscopy is probably the best as you can get a 3D image. Other useful types of microscopy include phase contrast and DIC, which allow you to look at the biofilm without staining it first.
What is the term used for a biofilm that builds up on the teeth?
plaque
Is a natural biofilm a pure culture?
A biofilm may consist of a single species embedded in extracellular polymeric substance (EPS), or it may consist of multiple species. The monospecies biofilm does constitute a 'pure' culture, and these do occur under natural circumstances, as for example, H. pylori biofilm in the human stomach (Cole et al (2004) Characterization of Monospecies biofilm formation by Helicobacter pylori," Journal of Bacteriology 186:3124-3132). However, most biofilms that people are familiar with - pipe slime, tooth plaque, etc. - include multiple bacterial species, and can include algae and/or fungus.
Which microscope is most useful for visualizing a biofilm?
scanning acoustic microscope
What is urine culture and sensitivity?
Urine culture is when a doctor orders a urine specimen to be evaluated in a lab to determine exactly what kind of bacteria are living in it and causing problems. "Culture" means to grow, and they literally grow the bacteria so that they can test different antibiotics on it. Some antibiotics may kill the bacteria, and some antibiotics have no effect on the bacteria. This is the "sensitivity" part. If a bacteria is sensitive to an antibiotic, it would be a good choice for treatment of the infection. If it is not sensitive, the it is resistant to the antibiotic and it won't produce a cure.
How is a biofilm different from a multicellular organism?
multicellular organisms are usually made up of specialised tissues that make up organs (a noteable exception is sponges). biofilms are made up of either a sinlge species or several species that fill niches in the biofilm ecosystem (one could liken the different species to different organs, providing different services to the biofilm as a whole).
